Page summary

https://stf.xelta.ai/ai-tool/virtual-try-on

Tested 2026-09-14 10:11:12 using Chrome 150.0.7871.46 (runtime settings)

SummaryWaterfallMetricsRenderingCoachPageXrayCPUThird party

This page is fast to paint, but janky to interact with, prone to layout shifts, loose on best practices, weak on user privacy and heavy to download.

71 / 100
Coach overall
72 / 100
Performance
65 / 100
Best practice
72 / 100
Privacy

How it loaded →

0 → 5.634 s · median run
Frame at 0 ms
start
Frame at 2100 ms
Largest paint2.100 s
Frame at 3000 ms
3.000 s
Frame at 3900 ms
3.900 s
Frame at 4800 ms
4.800 s
Frame at 5700 ms
Complete5.700 s
1.367 s
First Visual Change
1.686 s
Speed Index
1.800 s
Visual Complete 85%
5.634 s
Last Visual Change
TTFB481 msLCP1.608 sTBT1.192 sCLS0.11

What to act on · top recommendations

Don't scale images in the browser

0 / 100

The page has 10 images that are scaled more than 100 pixels. It would be better if those images are sent so the browser don't need to scale them.

Avoid using Google Tag Manager.

0 / 100

The page is using Google Tag Manager, this is a performance risk since non-tech users can add JavaScript to your page.

Avoid CPU Long Tasks

0 / 100

The page has 10 CPU long tasks with the total of 2.054 s. The total blocking time is 1.192 s and 1 long task before first contentful paint with total time of 412 ms. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. Use Geckoprofiler for Firefox or Chromes tracelog to debug your long tasks.

Google Web Vitals

min · median · mean · max of 1 run
MetricMinMedianMeanMax
Time To First Byte (TTFB)481 ms481 ms481 ms481 ms
Largest Contentful Paint (LCP)1.608 s1.608 s1.608 s1.608 s
Cumulative Layout Shift (CLS)0.10610.10610.10610.1061

Visual Metrics

min · median · mean · max of 1 run
MetricMinMedianMeanMax
First visual change1.367 s1.367 s1.367 s1.367 s
Last visual change5.634 s5.634 s5.634 s5.634 s
Speed index1.686 s1.686 s1.686 s1.686 s
Visual readiness4.267 s4.267 s4.267 s4.267 s
Visual complete 851.800 s1.800 s1.800 s1.800 s
Visual complete 952.000 s2.000 s2.000 s2.000 s
Visual complete 992.267 s2.267 s2.267 s2.267 s

CPU

min · median · mean · max of 1 run
MetricMinMedianMeanMax
Total Blocking Time1.192 s1.192 s1.192 s1.192 s
Max Potential FID330 ms330 ms330 ms330 ms
CPU long tasks 10101010
CPU last long task happens at3.818 s3.818 s3.818 s3.818 s

More metrics

min · median · mean · max of 1 run
MetricMinMedianMeanMax
First paint1.476 s1.476 s1.476 s1.476 s
Load event end1.994 s1.994 s1.994 s1.994 s

Waterfall

Run 1 SpeedIndex median

First paintFCPLCPDOMContentLoadedDOM interactiveLoadRender-blockingRedirectError

Rendering

Run 1 · median
0.000 s
0s1s2s3s4s5s

The red band on the timeline marks when the main thread was busy with long tasks: moments when the page could not paint or respond, however the video looks.

Download video

Filmstrip

46 frames

Use --filmstrip.showAll to show all filmstrips.

Frame at 0 ms
0 ms
0 %
Frame at 1.000 s
1.000 s
0 %
Frame at 1.400 s
1.400 s
9 %
Frame at 1.500 s
1.500 s
13 %
Frame at 1.600 s
1.600 s
81 %
Frame at 1.700 s
1.700 s
81 %
Frame at 1.800 s
1.800 s
86 %
Frame at 1.900 s
1.900 s
86 %
Frame at 2.000 s
2.000 s
95 %
Frame at 2.100 s
2.100 s
95 %
Frame at 2.200 s
2.200 s
95 %
Frame at 2.300 s
2.300 s
99 %
Frame at 2.400 s
2.400 s
99 %
Frame at 2.500 s
2.500 s
99 %
Frame at 2.600 s
2.600 s
99 %
Frame at 2.700 s
2.700 s
99 %
Frame at 2.800 s
2.800 s
99 %
Frame at 2.900 s
2.900 s
99 %
Frame at 3.000 s
3.000 s
99 %
Frame at 3.100 s
3.100 s
99 %
Frame at 3.200 s
3.200 s
99 %
Frame at 3.300 s
3.300 s
99 %
Frame at 3.400 s
3.400 s
99 %
Frame at 3.500 s
3.500 s
99 %
Frame at 3.600 s
3.600 s
99 %
Frame at 3.700 s
3.700 s
99 %
Frame at 3.800 s
3.800 s
99 %
Frame at 3.900 s
3.900 s
99 %
Frame at 4.000 s
4.000 s
99 %
Frame at 4.100 s
4.100 s
99 %
Frame at 4.200 s
4.200 s
99 %
Frame at 4.300 s
4.300 s
99 %
Frame at 4.400 s
4.400 s
99 %
Frame at 4.500 s
4.500 s
99 %
Frame at 4.600 s
4.600 s
99 %
Frame at 4.700 s
4.700 s
99 %
Frame at 4.800 s
4.800 s
99 %
Frame at 4.900 s
4.900 s
99 %
Frame at 5.000 s
5.000 s
99 %
Frame at 5.100 s
5.100 s
99 %
Frame at 5.200 s
5.200 s
99 %
Frame at 5.300 s
5.300 s
99 %
Frame at 5.400 s
5.400 s
99 %
Frame at 5.500 s
5.500 s
99 %
Frame at 5.600 s
5.600 s
99 %
Frame at 5.700 s
5.700 s
100 %

Click a frame to seek the video to that moment. The dot marks frames where the page changed visually.

Why was rendering delayed?

Rendering was not meaningfully delayed. First paint landed at 1.476 s on a 481 ms first byte; the 2 render-blocking requests were done by 829 ms and the remaining ~647 ms is style, layout and web-font loading. The largest paint followed at 1.608 s.

Want to see how much CSS style-recalculation work delayed FCP and LCP, plus CPU long tasks? Run with --cpu.

Render blocking requests

32 requests · 567.7 KB

Blocking requests delay both paints: the browser renders nothing until they arrive, so they push First Contentful Paint and everything after it, including the largest paint (LCP). Requests that block the parser inside the body stall everything after them in the document. Load JavaScript with defer or async, and keep non-critical CSS off the critical path with media attributes. Bars show when each request loaded on a clock that runs to the last paint (the dashed line is FCP, the clock ends at LCP); the gap after the bars is style and layout work. Web fonts are context, not blockers: text renders invisible or in a fallback face while they load, so a font finishing after a paint is the classic reason text changed late.

RequestWhen it loadedTransferDownload
document
stf.xelta.ai · TTFB 481 ms
889 ms
34.8 KB887 ms
css · stf.xelta.ai
238 ms
86.4 KB238 ms
css · stf.xelta.ai
197 ms
4.7 KB197 ms
3dlul65aa-nvq.jspotentially blocking
javascript · stf.xelta.ai
561 ms
73.3 KB561 ms
3sy5ezjqwbusz.jspotentially blocking
javascript · stf.xelta.ai
548 ms
48.8 KB548 ms
1ghsza2wgj0ob.jspotentially blocking
javascript · stf.xelta.ai
531 ms
44.0 KB531 ms
0r_-zfn80zo41.jspotentially blocking
javascript · stf.xelta.ai
524 ms
2.3 KB524 ms
26--kr-ciax9i.jspotentially blocking
javascript · stf.xelta.ai
523 ms
42.8 KB523 ms
03zd5dvwufaqs.jspotentially blocking
javascript · stf.xelta.ai
521 ms
13.7 KB521 ms
24 more requests
all done by 1.164 s
251.9 KB
LCP resource
1787034972806-2474fb4d5cb1db43.png — downloaded by 1.172 s, rendered at 1.608 s
105 ms
13.4 KB105 ms
web font · stf.xelta.ai
340 ms
71.9 KB340 ms
web font · stf.xelta.ai
325 ms
37.6 KB325 ms
web font · stf.xelta.ai
325 ms
8.1 KB325 ms
0402 ms804 ms1.206 sFCP 1.476 sLCP 1.608 s

Coach

The coach helps you find performance problems on your web page using web performance best practice rules. And gives you advice on privacy and best practices. Tested using Coach-core version 9.2.1.

What to fix first

Performance advice

72
2 errors12 warnings4 info
warn(0)Don't scale images in the browseravoidScalingImages

The page has 10 images that are scaled more than 100 pixels. It would be better if those images are sent so the browser don't need to scale them.

It's easy to scale images in the browser and make sure they look good in different devices, however that is bad for performance! Scaling images in the browser takes extra CPU time and will hurt performance on mobile. And the user will download extra kilobytes (sometimes megabytes) of data that could be avoided. Don't do that, make sure you create multiple version of the same image server-side and serve the appropriate one.

Offenders
warn(0)Avoid using Google Tag Manager.googleTagManager

The page is using Google Tag Manager, this is a performance risk since non-tech users can add JavaScript to your page.

Google Tag Manager makes it possible for non tech users to add scripts to your page that will downgrade performance.

warn(0)Avoid CPU Long TaskslongTasks

The page has 10 CPU long tasks with the total of 2.054 s. The total blocking time is 1.192 s and 1 long task before first contentful paint with total time of 412 ms. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. Use Geckoprofiler for Firefox or Chromes tracelog to debug your long tasks.

Long CPU tasks locks the thread. To the user this is commonly visible as a "locked up" page where the browser is unable to respond to user input; this is a major source of bad user experience on the web today. However the CPU Long Task is depending on the computer/phones actual CPU speed, so you should measure this on the same type of the device that your user is using. To debug you should use the Chrome timeline log and drag/drop it into devtools or use Firefox Geckoprofiler.

Offenders
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • self
  • self
warn(0)Serve images in modern formats (AVIF, WebP)modernImageFormats

The page ships 19 images (out of 19) in JPEG/PNG/GIF without a modern alternative. Wrap them in a <picture> with a <source type="image/avif"> or "image/webp" before the legacy <img>, or serve modern formats from your image pipeline directly. AVIF and WebP usually deliver 25–50% smaller files at the same quality.

AVIF and WebP routinely deliver 25–50% smaller files than JPEG and PNG at the same perceived quality, and every browser version still under support understands at least one of them. Ship modern formats either through a <picture> element with <source type="image/avif"> / "image/webp" entries in front of the legacy <img>, or directly from a content-negotiating image pipeline that returns AVIF / WebP when the client accepts it. https://web.dev/articles/serve-images-webp

Offenders
warn(0)Avoid extra requests by setting cache headerscacheHeaders

The page has 15 requests that are missing a cache time. Configure a cache time so the browser doesn't need to download them every time. It will save 4.3 MB the next access.

The easiest way to make your page fast is to avoid doing requests to the server. Setting a cache header on your server response will tell the browser that it doesn't need to download the asset again during the configured cache time! Always try to set a cache time if the content doesn't change for every request.

Offenders
infoAvoid too many fontsfewFonts
warn(0)Total JavaScript size shouldn't be too bigjavascriptSize

The total JavaScript transfer size is 1.4 MB and the uncompressed size is 4.5 MB. This is totally crazy! There is really room for improvement here.

A lot of JavaScript often means you are downloading more than you need. How complex is the page and what can the user do on the page? Do you use multiple JavaScript frameworks?

Offenders
URLTransferContent
https://stf.xelta.ai/_next/static/chunks/0_cis5bf89bk3.js3.7 KB9.3 KB
https://stf.xelta.ai/_next/static/chunks/3ur639cpt-7ui.js11.3 KB38.9 KB
https://stf.xelta.ai/_next/static/chunks/3dlul65aa-nvq.js73.3 KB232.0 KB
https://stf.xelta.ai/_next/static/chunks/3sy5ezjqwbusz.js48.8 KB171.2 KB
https://stf.xelta.ai/_next/static/chunks/turbopack-24c8re3t_hr9w.js6.6 KB18.4 KB
https://stf.xelta.ai/_next/static/chunks/0inxmj29ffnqy.js6.4 KB20.3 KB
https://stf.xelta.ai/_next/static/chunks/17d1-bwqhg7yp.js9.6 KB27.2 KB
https://stf.xelta.ai/_next/static/chunks/1umv1owun4cfl.js8.6 KB33.7 KB
https://stf.xelta.ai/_next/static/chunks/2uoulaw6kucli.js10.1 KB26.2 KB
https://stf.xelta.ai/_next/static/chunks/36h4r9duhyjke.js11.1 KB37.2 KB
https://stf.xelta.ai/_next/static/chunks/2f2i__v854m6r.js9.2 KB30.0 KB
https://stf.xelta.ai/_next/static/chunks/1ytwdotu3mdq4.js10.3 KB27.8 KB
https://stf.xelta.ai/_next/static/chunks/00up96pc24a4e.js10.4 KB25.8 KB
https://stf.xelta.ai/_next/static/chunks/2699mm_b_frg_.js8.0 KB21.0 KB
https://stf.xelta.ai/_next/static/chunks/2rlqhawoa2-1z.js24.1 KB77.8 KB
https://stf.xelta.ai/_next/static/chunks/0qj250lktf-9_.js12.8 KB34.0 KB
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https://stf.xelta.ai/_next/static/chunks/0v-y_275lo0v3.js10.8 KB29.1 KB
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https://stf.xelta.ai/_next/static/chunks/21qxs2_9klwty.js1.8 KB1.4 KB
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https://stf.xelta.ai/_next/static/chunks/1yoy6xy7rnaz0.js2.1 KB2.2 KB
https://stf.xelta.ai/_next/static/chunks/0r_-zfn80zo41.js2.3 KB2.7 KB
https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba178836298749510.1 KB29.6 KB
https://stf.xelta.ai/_next/static/chunks/0ga4rs1yp22vv.js2.4 KB3.0 KB
https://stf.xelta.ai/_next/static/chunks/2tldojfjwreij.js10.6 KB36.2 KB
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https://stf.xelta.ai/_next/static/chunks/0-kblk69bwgum.js5.5 KB11.9 KB
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https://stf.xelta.ai/_next/static/chunks/3r6i7ud2kx9-k.js10.6 KB33.7 KB
https://stf.xelta.ai/_next/static/chunks/31gmcbixca3pb.js1.3 KB312 B
https://www.googletagmanager.com/gtm.js?id=GTM-5XNS5NQ2115.0 KB324.1 KB
https://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP186.6 KB567.5 KB
https://connect.facebook.net/en_US/fbevents.js110.4 KB410.0 KB
https://stf.xelta.ai/_next/static/chunks/3f1tw02kuplod.js3.3 KB6.2 KB
https://stf.xelta.ai/_next/static/chunks/2k5vpzc_p9jpq.js35.3 KB106.7 KB
https://connect.facebook.net/signals/config/1123404090023729.../1123404090023729137.1 KB485.1 KB
https://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP&cx=c&gtm=4e69a0h2186.6 KB567.5 KB
https://stf.xelta.ai/_next/static/chunks/3m9-oomc-qdle.js1.4 KB455 B
https://stf.xelta.ai/_next/static/chunks/34zqwff648hvy.js10.7 KB33.9 KB
https://stf.xelta.ai/_next/static/chunks/0_ierrc7whc8i.js10.5 KB31.3 KB
https://stf.xelta.ai/_next/static/chunks/3dh4veiardltk.js47.0 KB206.7 KB
warn(0)Total page size shouldn't be too bigpageSize

The page total transfer size is 6.5 MB, which is more than the coach limit of 3 MB. That is insane and you need to make it smaller.

Avoid having pages that have a transfer size over the wire of more than 3 MB (desktop) and 2 MB (mobile) because heavy pages hurt performance and are expensive for users on metered connections. Reference: HTTP Archive median page weight in 2024 was around 2.7 MB desktop / 2.4 MB mobile, so this rule fires when a page is above the modern median.

Offenders
URLTransferContent
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https://stf.xelta.ai/cdn-cgi/speculation459 B151 B
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https://stf.xelta.ai/_next/image...ta.ai/_next/image8.7 KB7.6 KB
https://stf.xelta.ai/_next/image?url=%2Fhero%2FoutfitGirl.webp&w=384&q=757.5 KB6.4 KB
https://stf.xelta.ai/_next/image?url=%2Fvirtual-tryon%2Finput-t.jpeg&w=750&q=7535.8 KB34.7 KB
https://stf.xelta.ai/_next/image?url=%2Fvirtual-tryon%2Fxelta_download_1772709052129.jpeg&w=640&q=759.8 KB7.8 KB
https://stf.xelta.ai/_next/image...ta.ai/_next/image2.3 KB1.2 KB
https://stf.xelta.ai/_next/image...ta.ai/_next/image2.3 KB1.2 KB
https://stf.xelta.ai/_next/image...ta.ai/_next/image2.3 KB1.2 KB
https://stf.xelta.ai/_next/image...ta.ai/_next/image3.2 KB1.2 KB
https://stf.xelta.ai/cdn-cgi/rum?589 B0 b
https://stf.xelta.ai/icons/favicon.ico9.6 KB8.3 KB
https://stf.xelta.ai/icons/apple-touch-icon.png6.0 KB4.6 KB
https://stf.xelta.ai/api/payment/public/pricing1.6 KB117 B
https://stf.xelta.ai/_next/static/chunks/0ga4rs1yp22vv.js2.4 KB3.0 KB
https://stf.xelta.ai/_next/static/chunks/2tldojfjwreij.js10.6 KB36.2 KB
https://stf.xelta.ai/_next/static/chunks/1_sa18c8qfniy.js6.2 KB16.2 KB
https://stf.xelta.ai/api/cms/maintenance1.6 KB43 B
https://stf.xelta.ai/api/quiz/quiz-events/active-banner1.6 KB43 B
https://stf.xelta.ai/api/cms/announcements?placement=APP_TOP1.6 KB26 B
https://stf.xelta.ai/_next/static/chunks/0-kblk69bwgum.js5.5 KB11.9 KB
https://stf.xelta.ai/_next/static/chunks/1lrh5vntxtq_1.js16.0 KB50.9 KB
https://stf.xelta.ai/_next/static/chunks/3r6i7ud2kx9-k.js10.6 KB33.7 KB
https://stf.xelta.ai/_next/static/chunks/31gmcbixca3pb.js1.3 KB312 B
https://www.googletagmanager.com/gtm.js?id=GTM-5XNS5NQ2115.0 KB324.1 KB
https://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP186.6 KB567.5 KB
https://connect.facebook.net/en_US/fbevents.js110.4 KB410.0 KB
https://stf.xelta.ai/_next/static/chunks/3f1tw02kuplod.js3.3 KB6.2 KB
https://stf.xelta.ai/_next/static/chunks/2k5vpzc_p9jpq.js35.3 KB106.7 KB
https://stf.xelta.ai/api/geo1.8 KB155 B
https://tryon.stg.xelta.ai/api/community/posts?page=1&limit=20&type=image79.7 KB79.3 KB
https://connect.facebook.net/signals/config/1123404090023729.../1123404090023729137.1 KB485.1 KB
https://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP&cx=c&gtm=4e69a0h2186.6 KB567.5 KB
https://analytics.google.com/g/collect...gle.com/g/collectN/A0 b
https://stats.g.doubleclick.net/g/collect...ick.net/g/collect555 B0 b
https://www.google.co.in/ads/ga-audiences.../ads/ga-audiences408 B42 B
https://media.xelta.ai/outputs/7a2dfefe-803e-410a-9613-dd2dc56c917b_front-facing_standing_pose.png66.3 KB65.8 KB
https://pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev/outputs/02b8dc54-7b4e-48e7-8...body_portrait.png554.5 KB554.5 KB
https://pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev/outputs/0cc79c85-9e37-4033-9...standing_pose.png631.8 KB631.8 KB
https://pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev/outputs/f06ab4aa-9262-4239-8...body_portrait.png639.1 KB639.1 KB
https://stf.xelta.ai/api/media/signN/A113 B
https://mpc-prod-27-s6uit34pua-uk.a.run.app/events?cee=noN/A0 b
https://pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev/outputs/348b7f14-2597-489a-b...body_standing.png435.6 KB435.6 KB
https://pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev/outputs/98cc0014-9280-4909-b...body_standing.png531.8 KB531.8 KB
https://pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev/outputs/c5a706ec-1724-450d-a...body_portrait.png653.9 KB653.9 KB
https://pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev/outputs/4af69e0e-752d-4750-a...body_standing.png634.3 KB634.3 KB
https://stf.xelta.ai/_next/static/chunks/3m9-oomc-qdle.js1.4 KB455 B
https://stf.xelta.ai/_next/static/chunks/34zqwff648hvy.js10.7 KB33.9 KB
https://stf.xelta.ai/_next/static/chunks/0_ierrc7whc8i.js10.5 KB31.3 KB
https://stf.xelta.ai/_next/static/chunks/3dh4veiardltk.js47.0 KB206.7 KB
https://stf.xelta.ai/_next/image?url=%2Fchatboard%2Favtar.png&w=96&q=752.1 KB1.0 KB
https://telemetry.matchbestsoftware.online/faro/0 b0 b
https://telemetry.matchbestsoftware.online/faro/286 B2 B
https://www.facebook.com/tr/N/A0 b
warn(50)Total CSS size shouldn't be too bigcssSize

The total CSS transfer size is 93.3 kB and uncompressed size is 688.9 kB. That is big and the CSS could most probably be smaller.

Delivering a massive amount of CSS to the browser is not the best thing you can do, because it means more work for the browser when parsing the CSS against the HTML and that makes the rendering slower. Try to send only the CSS that is used on that page. And make sure to remove CSS rules when they aren't used anymore.

Offenders
URLTransferContent
https://stf.xelta.ai/_next/static/chunks/0l1q20e5y-c75.css86.4 KB636.6 KB
https://stf.xelta.ai/_next/static/chunks/0kldb6fnstui0.css4.7 KB36.2 KB
warn(50)Total image size shouldn't be too bigimageSize

The page total image size is 4.5 MB. It's really big. Is the page using the right format for the images? Can they be lazy loaded? Are they compressed as good as they can be? Make them smaller by using https://imageoptim.com/.

Avoid having too many large images on the page. The images will not affect the first paint of the page, but it will eat bandwidth for the user.

infoAdd decoding="async" to non-critical imagesdecodingAsync

The page has 19 images (out of 48) without a decoding hint. Add decoding="async" to non-critical images so the browser can decode them off the main thread.

Setting decoding="async" on an <img> tells the browser it can decode the image off the main thread, which keeps the page responsive to user interactions while images are being processed. The default ("auto") leaves the choice to the browser. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#decoding

Offenders
warn(60)Don't use private headers on static contentprivateAssets

The page has 5 requests with private headers. The main page has a private header. It could be right in some cases where the user can be logged in and served specific content. But if your asset is static it should never be private. Make sure that the assets really should be private and only used by one user. Otherwise, make it cacheable for everyone.

If you set private headers on content, that means that the content are specific for that user. Static content should be able to be cached and used by everyone. Avoid setting the cache header to private.

Offenders
infoLong cache headers is goodcacheHeadersLong

The page has 22 requests that have a shorter cache time than one year (but still a cache time).

Setting a cache header is good. Setting a long cache header (a year) is even better because the asset will stay in the browser cache across visits. For content-hashed URLs (e.g. app.4af2.css) you can safely use Cache-Control: max-age=31536000, immutable. For unversioned URLs that may change, use a revalidating strategy instead.

Offenders
warn(90)Always compress text contentcompressAssets

The page has 1 request that are served uncompressed. You could save a lot of bytes by sending them compressed instead.

In the early days of the Internet there were browsers that didn't support compressing (gzipping) text content. They do now. Make sure you compress HTML, JSON, JavaScript, CSS and SVG. It will save bytes for the user; making the page load faster and use less bandwith.

Offenders
URLTransferContent
https://tryon.stg.xelta.ai/api/community/posts?page=1&limit=20&type=image79.7 KB79.3 KB
infoMake each CSS response smalloptimalCssSize

https://stf.xelta.ai/_next/static/chunks/0l1q20e5y-c75.css size is 88.5 kB (88472) and that is bigger than the limit of 25 kB. Try to keep each CSS response under 25 kB.

Render-blocking CSS holds up the first paint until it has fully downloaded, parsed and applied, so smaller CSS files mean a faster start. Split your CSS into a small critical bundle inlined or eagerly loaded, with the rest lazy-loaded.

Offenders
URLTransferContent
https://stf.xelta.ai/_next/static/chunks/0l1q20e5y-c75.css86.4 KB636.6 KB
error(90)Avoid missing and error requestsresponseOk

The page has 1 error response. The page has 1 response with code 503.

Your page should never request assets that return a 400 or 500 error. These requests are never cached. If that happens something is broken. Please fix it.

Offenders
warn(95)Inline CSS for faster first renderinlineCss

The page has both inline CSS and CSS requests even though it uses a HTTP/2-ish connection. If you have many users on slow connections, it can be better to only inline the CSS. Run your own tests and check the waterfall graph to see what happens.

In the early days of the Internet, inlining CSS was one of the ugliest things you can do. That has changed if you want your page to start rendering fast for your user. Always inline the critical CSS when you use HTTP/1 and HTTP/2 (avoid doing CSS requests that block rendering) and lazy load and cache the rest of the CSS. It is a little more complicated when using HTTP/2. Does your server support HTTP push? Then maybe that can help. Do you have a lot of users on a slow connection and are serving large chunks of HTML? Then it could be better to use the inline technique, becasue some servers always prioritize HTML content over CSS so the user needs to download the HTML first, before the CSS is downloaded.

error(99)Avoid using incorrect mime typesmimeTypes

The page has 1 misconfigured mime type.

It's not a great idea to let browsers guess content types (content sniffing), in some cases it can actually be a security risk.

Offenders

Best practice advice

65
1 error2 warnings4 info
warn(0)Avoid too many third party requeststhirdParty

The page do 18% requests to third party domains (20 requests and 4.9 MB). First party is 91 requests and 1.5 MB. The page transfer more bytes from third party domains (4.9 MB) then first party (1.5 MB). The regex .*xelta.* was used to calculate first/third party requests.

Do not load most of your content from third party URLs.

infoAvoid unnecessary headersunnecessaryHeaders

There are 1 response that sets a p3p header. There are 5 responses that sets both a max-age and expires header. There are 3 responses that sets a pragma no-cache header (that is a request header). There are 109 responses that sets a server header.

Do not send headers that you don't need. We look for p3p, cache-control and max-age, pragma, server and x-frame-options headers. Have a look at Andrew Betts - Headers for Hackers talk as a guide https://www.youtube.com/watch?v=k92ZbrY815c or read https://www.fastly.com/blog/headers-we-dont-want.

Offenders
error(50)Cumulative Layout ShiftcumulativeLayoutShift

You have a cumulative layout shift score (0.1061) that needs improvements. It is in the Google Web Vitals needs improvement range, shift higher than 0.1. You should manually check the filmstrip or video and check if it will affect the user.

Cumulative Layout Shift measures the sum total of all individual layout shift scores for unexpected layout shift that occur. The metric is measuring visual stability by quantify how often users experience unexpected layout shifts. It is one of Google Web Vitals.

infoMeta descriptionmetaDescription

The meta description is too long. It has 203 characters, the recommended max is 160

Use a page description to make the page more relevant to search engines.

warn(50)Page titlepageTitle

The title is too long by 5 characters. The recommended max is 60

Use a title to make the page more relevant to search engines.

infoDo not send too long headerslongHeaders

https://stf.xelta.ai...ol/virtual-try-on has a header link that is 1725 characters long. https://stf.xelta.ai...7m9ogm38dql.woff2 has a header content-security-policy-report-only that is 799 characters long. https://stf.xelta.ai...7m9ogm38dql.woff2 has a header report-to that is 617 characters long. https://stf.xelta.ai...ta.ai/_next/image has a header content-security-policy-report-only that is 799 characters long. https://stf.xelta.ai...ta.ai/_next/image has a header report-to that is 621 characters long. https://stf.xelta.ai...ta.ai/_next/image has a header content-security-policy-report-only that is 798 characters long. https://stf.xelta.ai...ta.ai/_next/image has a header report-to that is 622 characters long. https://stf.xelta.ai...ta.ai/_next/image has a header content-security-policy-report-only that is 798 characters long. https://stf.xelta.ai...ta.ai/_next/image has a header report-to that is 620 characters long. https://connect.face...en_US/fbevents.js has a header content-security-policy that is 1344 characters long. https://connect.face...en_US/fbevents.js has a header permissions-policy that is 874 characters long. https://connect.face.../1123404090023729 has a header content-security-policy that is 1344 characters long. https://connect.face.../1123404090023729 has a header permissions-policy that is 874 characters long.

Do not send response headers that are too long.

Offenders
infoAvoid use too many response headersmanyHeaders

https://stf.xelta.ai...nt/public/pricing has 33 headers.https://stf.xelta.ai/api/cms/maintenance has 33 headers.https://stf.xelta.ai...nts/active-banner has 33 headers.https://stf.xelta.ai...cms/announcements has 33 headers.https://stf.xelta.ai/api/geo has 32 headers.

Avoid send too many response headers.

Offenders

Privacy advice

72
5 warnings2 info
warn(0)Avoid using Google Analyticsga

The page is using Google Analytics meaning you share your users private information with Google. You should use analytics that care about user privacy, something like https://matomo.org.

Google Analytics share private user information with Google that your user hasn't agreed on sharing.

warn(0)Avoid embedding services from surveillance capitalist companiessurveillance

The page embeds 5 resources from companies that profit from user surveillance. Consider privacy-respecting alternatives.

Embedding scripts or iframes from companies whose business model is surveillance capitalism (Google, Facebook, etc.) leaks detailed user data on every page view, often before the user has had a chance to consent. See https://en.wikipedia.org/wiki/Surveillance_capitalism for background. Prefer privacy-respecting alternatives where possible.

Offenders
infoSet a Cross-Origin-Embedder-Policy header so cross-origin subresources opt in to being embedded.crossOriginEmbedderPolicyHeader

Set a Cross-Origin-Embedder-Policy header (typically require-corp or credentialless) on the document response to control cross-origin embedding.

Cross-Origin-Embedder-Policy (COEP) makes the page refuse to load cross-origin subresources unless they explicitly opt in via CORP or CORS. Together with Cross-Origin-Opener-Policy it puts the page in a cross-origin isolated context, which mitigates cross-window side-channel attacks (Spectre) and unlocks high-resolution timers and SharedArrayBuffer. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cross-Origin-Embedder-Policy

Offenders
warn(0)Set a Cross-Origin-Opener-Policy header to isolate the page from cross-origin windows.crossOriginOpenerPolicyHeader

Set a Cross-Origin-Opener-Policy header (typically same-origin) on the document response to isolate the page from cross-origin windows.

Cross-Origin-Opener-Policy (COOP) lets a page sever its window-group ties to cross-origin documents that opened it or that it opens. Together with Cross-Origin-Embedder-Policy it puts the page in a cross-origin isolated context, which mitigates cross-window side-channel attacks (Spectre) and unlocks high-resolution timers and SharedArrayBuffer. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cross-Origin-Opener-Policy

Offenders
infoSet a Cross-Origin-Resource-Policy header to limit who may embed the page.crossOriginResourcePolicyHeader

Set a Cross-Origin-Resource-Policy header (same-origin, same-site or cross-origin) on the document response to limit who may embed it.

Cross-Origin-Resource-Policy (CORP) is a per-response opt-in that tells the browser which origins are allowed to embed the resource. It blocks cross-origin or cross-site no-cors embedding (img, script, iframe, etc.) and is one of the building blocks of cross-origin isolation. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Cross-Origin-Resource-Policy

Offenders
warn(0)Do not share user data with third parties.thirdPartyPrivacy

The page has 9% requests that are 3rd party (10 requests with a size of 764.6 kB). The page also have request to companies that harvest data from users and do not respect users privacy (see https://en.wikipedia.org/wiki/Surveillance_capitalism). The page do 2 utility requests and uses 2 utility tools. The page do 3 tag-manager requests and uses 1 tag-manager tool. The page do 9 survelliance requests and uses 5 survelliance tools. The page do 9 surveillance requests and uses 5 surveillance tools. The page do 3 social requests and uses 1 social tool. The page do 1 analytics request and uses 1 analytics tool. The page do 1 ad request and uses 1 ad tool.

Using third party requests shares user information with that third party. Please avoid that! The project https://github.com/patrickhulce/third-party-web is used to categorize first/third party requests.

Offenders
warn(90)Avoid third party cookies that is used to track the user.thirdPartyCookies

The page sets 1 third party cookie.

Third party cookies are used to track the user. They are automatically blocked in Safari and Firefox.

Offenders
  • .facebook.com

Page info

A snapshot of what the browser actually built for this page: the document, how big and deep the DOM tree is and what it kept in storage. Big, deep trees are slower to style and lay out, so the counts Chrome warns about carry a flag.

Page info

Document

What the page says it is and how large it rendered.

TitleAI Virtual Try-On Tool – Digital Fitting Room for Clothes | XeltaThe document title, shown in the browser tab and used by search results.
Layout viewport1358 × 4376 pxThe width the page laid out at, and the full height of the rendered document.

DOM structure

How much markup the browser has to build, style and lay out.

DOM elements1,761Very large, slows layout and styleTotal HTML elements. Fewer means less for the browser to style, lay out and paint.
Avg DOM depth10How deeply elements are nested on average.
Max DOM depth16The deepest nesting on the page. Deep branches cost more style recalculation.
Iframes1Embedded documents. Each is a separate page the browser loads and renders.
Script tags60Number of script elements. More scripts usually means more main-thread work.

Storage and connection

What the page stored on the client, and the network it was tested on.

Local storage360 BData the page saved in localStorage, kept across visits.
Session storage188 BData kept in sessionStorage for this tab session only.
Connection type4GWhat the Network Information API reported for the test connection.

Resource hints

4 hints
dns-prefetch
  • https://media.xelta.ai/
preconnect
  • https://media.xelta.ai/
  • https://fonts.googleapis.com/
  • https://fonts.gstatic.com/

Technologies used to build the page

Data collected using Coach-core version 9.2.1. With updated code from Webappanalyzer 2026-05-04. Use --browsertime.firefox.includeResponseBodies html or --browsertime.chrome.includeResponseBodies html to help Wappalyzer find more information about technologies used.

Detected technologies

5 technologies

Third-party tools

16 tools

Data collected using Third Party Web version 0.29.2.

Utility
  • Cloudflare
  • Other Google APIs/SDKs
Tag-manager
  • Google Tag Manager
Survelliance
  • Google Tag Manager
  • Facebook
  • Google Analytics
  • Google/Doubleclick Ads
  • Other Google APIs/SDKs
Surveillance
  • Google Tag Manager
  • Facebook
  • Google Analytics
  • Google/Doubleclick Ads
  • Other Google APIs/SDKs
Social
  • Facebook
Analytics
  • Google Analytics
Ad
  • Google/Doubleclick Ads

Data from run 1

Visual Metrics

Visual milestones

all times from navigation start
Speed Index1.69 show quickly the page looked done
First Visual Change1.37 sfirst paint reaches the screen
Last Visual Change5.63 sscreen stops changing · 4.27 s after first
nothing painted yet
≥99%
1.37 sFirst Visual Change
1.80 sVisual Complete 85%
2.00 sVisual Complete 95%
2.27 sVisual Complete 99%
Last Visual Change5.63 s
Visual Readiness4.27 s· first to last change
01.0 s2.0 s3.0 s4.0 s5.0 s
Content milestones
Perception index
Visual progress
Visual progress at 0 s0.0s
Visual progress at 1.8 s1.8s
Visual progress at 2.5 s2.5s
Visual progress at 3.1 s3.1s
Visual progress at 3.8 s3.8s
Visual progress at 4.4 s4.4s
Visual progress at 5.1 s5.1s
Visual progress at 5.7 s5.7s
FCP1.48s
LCP1.61s
VC851.80s
Long tasks
0.0s1.1s2.3s3.4s4.6s5.7s

Google Web Vitals

from run 1
481 msTTFB
Good
0.11CLS
Needs improvement
1.192 sTBT
Poor

Largest Contentful Paint

When the page main content is rendered, collected via the Largest Contentful Paint API. Read more about Largest Contentful Paint.

1.608 sLCP render time

Phase breakdown

  • TTFB481 ms
  • Resource load delay601 ms
  • Resource load duration106 ms
  • Element render delay421 ms

Element

Element type
<div>
Size (w × h)
747900
URL
https://media.xelta....4fb4d5cb1db43.png
Load time
1.385 s

DOM path

body > div#app-root > div:eq(1) > section:eq(0) > div:eq(0)
LCP

The LCP element is highlighted in the screenshot. If nothing is highlighted the element was removed before the screenshot or the LCP API couldn't find it.

The Largest Contentful Paint API matched this image:

LCP element

Cumulative Layout Shift

How much the page's content shifts as it loads, collected via the Cumulative Layout Shift API.

0.106cumulative layout shift score

Elements that shifted

Sorted by individual shift score (higher = bigger shift). The top entries usually account for most of the page's CLS.

  • #10.106<img alt="Girl Virtual Fit" loading="lazy" width="320" height="420" decoding="async" data-nimg="1" class="absolute top-[60%] left-[49%] -translate-x-1/2 -translate-y-1/2 z-10 w-[180px] sm:w-[440px] h-auto object-contain pointer-events-none" style="color:transparent" srcset="/_next/image?url=%2Fhero%2FoutfitGirl.webp&amp;w=384&amp;q=75 1x, /_next/image?url=%2Fhero%2FoutfitGirl.webp&amp;w=640&amp;q=75 2x" src="/_next/image?url=%2Fhero%2FoutfitGirl.webp&amp;w=640&amp;q=75">,<div class="lg:col-span-6 text-left flex flex-col lg:ml-16 justify-center"></div>,<div class="absolute bottom-0 inset-x-0 h-36 bg-gradient-to-t from-black via-black/80 to-transparent pointer-events-none z-20"></div>
    body > div#app-root > div:eq(1) > section:eq(0) > div:eq(3) > div:eq(1) > img:eq(1),body > div#app-root > div:eq(1) > section:eq(0) > div:eq(3) > div:eq(0),body > div#app-root > div:eq(1) > section:eq(0) > div:eq(2)
  • #20.000<div class="hidden lg:flex items-center flex-shrink-0 ml-auto"></div>
    body > div#app-root > header > div > div:eq(2)
Layout shift

Elements that shifted by more than 0.01 are highlighted in the screenshot. If an element shifted outside the viewport, it won't appear here. Check the video or filmstrip to see the shift.

Browser Metrics

Navigation Timing
Extra timings

Server timings

Timing data the server chose to expose through Server-Timing response headers on the main document — typically backend time, cache status or experiment flags.

Server timings

3 entries
NameDurationDescription
cfCacheStatus0 msDYNAMIC
cfEdge7 ms–
cfOrigin336 ms–

Custom metrics collected through JavaScript

There are no custom configured scripts.

Extra metrics collected using scripting

There are no custom extra metrics from scripting.

PageXray

How the page is built.

HTTP versionHTTP/2.0
Total requests111
Total domains13
Transfer size6.2 MB
Content size9.9 MB
Missing compression1
Cookies41 third-party

Main document

status 200 · 0 redirects

https://stf.xelta.ai/ai-tool/virtual-try-on

HeaderValue
alt-svch3=":443"; ma=86400
cache-controlprivate, no-cache, no-store, max-age=0, must-revalidate
cf-cache-statusDYNAMIC
cf-raya3ae9b43c935a7f8-DEL
content-encodingbr
content-security-policydefault-src 'self'; script-src 'self' 'nonce-jKrtsC0ywYORz/XU++InrQ==' 'strict-dynamic' https:; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com data:; img-src 'self' data: blob: https:; media-src 'self' https: blob:; connect-src 'self' https: wss:; worker-src 'self' blob:; frame-src 'self' https:; frame-ancestors 'none'; object-src 'none'; base-uri 'self'; form-action 'self'
content-security-policy-report-onlydefault-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https:; style-src 'self' 'unsafe-inline' https:; img-src 'self' data: blob: https:; font-src 'self' data: https:; media-src 'self' data: blob: https:; connect-src 'self' https: wss:; worker-src 'self' blob:; frame-src 'self' https:; object-src 'none'; base-uri 'self'; form-action 'self' https:; frame-ancestors 'self';
content-typetext/html; charset=utf-8
dateMon, 14 Sep 2026 10:11:15 GMT
expect-ctmax-age=86400, enforce
link</_next/static/media/47fe1b7cd6e6ed85-s.p.3bh2vc0w-r-ll.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/83afe278b6a6bb3c-s.p.2bn3s6zvc0dyp.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/8dfd6563338cbf38-s.p.2uos8jt9rp249.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/8e6fa89aa22d24ec-s.p.2o7m9ogm38dql.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/9d0c71fa164043fa-s.p.2snziqcncuet5.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/9e9f04e3c37952ab-s.p.0pan85mumqyf3.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/a218039a3287bcfd-s.p.43zbiuwnnoiok.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/c875c6f5d3e977ac-s.p.1h18_wedhzk4h.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/ce62453a442c7f35-s.p.0a0h245ktd4x0.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/e2334d715941921e-s.p.3o_v2fun1jzxk.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2", </_next/static/media/e8f2fbee2754df70-s.p.1dqa_6e_ad4sj.woff2>; rel=preload; as="font"; crossorigin=""; nonce="jKrtsC0ywYORz/XU++InrQ=="; type="font/woff2"
nel{"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
permissions-policycamera=(), microphone=(self), geolocation=(), interest-cohort=()
referrer-policysame-origin strict-origin-when-cross-origin
report-to{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=Dc0Fl9Vcjp%2BCD0ApJy6sgtn1eBQ0d7%2BErI3MCSuCfkVwXKd9ogulFhABYB%2BPGKsapqUE6UaWYsx6yvn0SqQUfHdyZOV%2Bh1SVrHl%2BcJ%2BmsZZeLznIeVBSUwgoOZhh4g%3D%3D"}]}
servercloudflare
server-timingcfCacheStatus;desc="DYNAMIC" cfEdge;dur=7,cfOrigin;dur=336
speculation-rules"/cdn-cgi/speculation"
strict-transport-securitymax-age=31536000; includeSubDomains; preload
varyrsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch, Accept-Encoding
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
x-xss-protection1; mode=block

Response codes

200
10594.6%
202
10.9%
204
43.6%
503
10.9%

Requests and sizes per content type

9 types

Transfer size6.2 MB

  • image69.6%
  • javascript21.9%
  • font4.9%
  • css1.4%
  • json1.4%
  • html0.55%
  • favicon0.15%
  • plain0.02%
  • other0.01%

Content size9.9 MB

  • javascript43.6%
  • image43.3%
  • css6.7%
  • font3.0%
  • html2.6%
  • json0.80%
  • favicon0.08%
  • other0.00%
  • plain0.00%

Requests110

  • javascript45.5%
  • image27.3%
  • font10.0%
  • json7.3%
  • plain5.5%
  • css1.8%
  • html0.91%
  • favicon0.91%
  • other0.91%
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b34.8 KB263.4 KB1
css0 b91.1 KB672.8 KB2
javascript0 b1.4 MB4.3 MB50
image2.0 KB4.3 MB4.3 MB30
font0 b310.6 KB304.1 KB11
favicon0 b9.6 KB8.3 KB1
other0 b459 B151 B1
json0 b90.0 KB80.9 KB8
plain0 b1.4 KB2 B6
Total2.0 KB6.2 MB9.9 MB110

Data per domain

13 domains
DomainTotal download timeTransfer SizeContent SizeRequests
stf.xelta.ai34.604 s1.3 MB3.4 MB88
static.cloudflareinsights.com173 ms10.1 KB29.6 KB1
media.xelta.ai159 ms79.7 KB78.6 KB2
www.googletagmanager.com1.125 s488.2 KB1.4 MB3
connect.facebook.net415 ms247.5 KB895.2 KB2
tryon.stg.xelta.ai951 ms79.7 KB79.3 KB1
analytics.google.com260 msN/A0 b1
stats.g.doubleclick.net226 ms555 B0 b1
www.google.co.in240 ms408 B42 B1
pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev6.482 s4.0 MB4.0 MB7
mpc-prod-27-s6uit34pua-uk.a.run.app400 msN/A0 b1
telemetry.matchbestsoftware.online227 ms286 B2 B2
www.facebook.com224 msN/A0 b1

Expires & last-modified statistics

typeminmedianmax
Expires0 seconds1 year1 year
Last modified1 hour2 days9 weeks

Requests loaded after onLoad event

44 requests

Includes requests done after load event end.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript896.4 KB18
image4.1 MB11
font0 b0
favicon9.6 KB1
plain1.4 KB6
json88.0 KB7
Total5.0 MB44

Requests loaded after onContentLoad

44 requests

Includes requests done after DOM content loaded.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript896.4 KB18
image4.1 MB11
font0 b0
favicon9.6 KB1
plain1.4 KB6
json88.0 KB7
Total5.0 MB44

CPU

Get deeper CPU insight with one extra run
Run with --enableProfileRun to see where main-thread time went, blocking time and CPU cost per script, module and function, forced reflows and frame stability. The data is collected in one extra run, so the timing metrics of your measured runs stay untouched.

Long tasks

Tasks ≥ 50 ms blocking the main thread, collected via the Long Task API.

TBT1.192 s
Max potential input delay330 ms
Total long tasks10
Total time2.054 s
Last task at3.818 s
Before first paint412 ms1 task
Before FCP412 ms1 task
Before LCP619 ms2 tasks
After load1.435 s8 tasks

Long Animation Frames

A long animation frame (LOAF) is a frame that took ≥ 50 ms from input to the next paint. The part beyond the threshold is blocking time, the number that hurts Interaction to Next Paint and Total Blocking Time. Break long tasks up (scheduler.yield(), smaller chunks) or move the work off the main thread. Read more about the Long Animation Frames API.

Long animation frames15showing the 10 with the most blocking time
Blocking time1.605 sacross all long frames — what hurts INP and TBT
Forced style & layout0.7 msscripts reading layout mid-frame
Blocking before LCP540.9 msdelaying the largest paint — fix these first
Blocking after load1.055 safter the load event — didn't delay page load

What to fix first

ScriptFramesTime runningBlocking (share by run time)Forced style & layoutTriggered by
11234040900237293rd party1329.4 ms281.5 ms0.7 msscript tag
js3rd party2376.3 ms276.7 ms–script tag, timer or animation callback
3dlul65aa-nvq.js2362.9 ms232.1 ms–script tag, event handler
fbevents.js3rd party1214.5 ms157.5 ms–script tag
gtm.js3rd party1151.1 ms100.8 ms–script tag
js3rd party1136.8 ms85.4 ms–script tag
2k5vpzc_p9jpq.js171.2 ms21.2 ms–script tag
v31edd6df95cf4e85bb4c19e7a9bdbcba17883629874953rd party124.2 ms14.4 ms–module script
turbopack-24c8re3t_hr9w.js18.7 ms5.2 ms–script tag

A frame's blocking time is split between its scripts by their share of the frame's work, capped at each script's own run time — blocking from work no script owns (HTML parsing, browser internals) stays unattributed. The per-script blocking view below uses the same attribution.

Long animation frame #1 · 745.8 msat 596 ms · before LCP
blocking 378.5 ms
  • Scripts & other work369.6 ms
  • Animation callbacks0.8 ms
  • Style & layout375.4 ms
  • Render0 ms

The browser did not report which script was responsible for this frame — typically its own style/layout work, or a cross-origin script it will not name.

Long animation frame #2 · 338.3 msat 3.818 s · after load
blocking 284.9 ms
  • Scripts & other work333.4 ms
  • Animation callbacks0.2 ms
  • Style & layout4.7 ms
  • Render0 ms
1 script ran during this frame · forced style & layout 0.7 ms
Ran for
329.4 ms
Forced style and layout
0.7 ms
How it started
script tag
Long animation frame #3 · 226.5 msat 2.737 s · after load
blocking 165.6 ms
  • Scripts & other work225.6 ms
  • Animation callbacks0.1 ms
  • Style & layout0.8 ms
  • Render0 ms
1 script ran during this frame
fbevents.js3rd party
Ran for
214.5 ms
How it started
script tag
Long animation frame #4 · 277.7 msat 1.486 s · before LCP
blocking 162.4 ms
  • Scripts & other work272.3 ms
  • Animation callbacks5.3 ms
  • Style & layout0.1 ms
  • Render0 ms
4 scripts ran during this frame
Ran for
8.7 ms
How it started
script tag
Ran for
24.2 ms
How it started
module script
Ran for
197.5 ms
How it started
script tag
Ran for
9.5 ms
Started by
#document.onload
How it started
event handler
Source function
dU
Position in source
character 225441 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Long animation frame #5 · 211 msat 3.161 s · after load
blocking 159.6 ms
  • Scripts & other work210.4 ms
  • Animation callbacks0.1 ms
  • Style & layout0.5 ms
  • Render0 ms
1 script ran during this frame
js3rd party
Ran for
208.7 ms
How it started
script tag
Long animation frame #6 · 176.2 msat 3.374 s · after load
blocking 121.7 ms
  • Scripts & other work172.3 ms
  • Animation callbacks0.3 ms
  • Style & layout3.6 ms
  • Render0 ms
1 script ran during this frame
js3rd party
Ran for
167.6 ms
Started by
TimerHandler:setTimeout
How it started
timer or animation callback
Long animation frame #7 · 166.3 msat 2.086 s · after load
blocking 111.8 ms
  • Scripts & other work160.4 ms
  • Animation callbacks5.8 ms
  • Style & layout0.1 ms
  • Render0 ms
1 script ran during this frame
Ran for
155.9 ms
Started by
MessagePort.onmessage
How it started
event handler
Source function
z
Position in source
character 3191 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Long animation frame #8 · 154.3 msat 2.976 s · after load
blocking 102.3 ms
  • Scripts & other work153.4 ms
  • Animation callbacks0.1 ms
  • Style & layout0.8 ms
  • Render0 ms
1 script ran during this frame
gtm.js3rd party
Ran for
151.1 ms
How it started
script tag
Long animation frame #9 · 140.6 msat 3.580 s · after load
blocking 87.5 ms
  • Scripts & other work140.1 ms
  • Animation callbacks0.1 ms
  • Style & layout0.4 ms
  • Render0 ms
1 script ran during this frame
js3rd party
Ran for
136.8 ms
How it started
script tag
Long animation frame #10 · 71.4 msat 2.452 s · after load
blocking 21.3 ms
  • Scripts & other work71.4 ms
  • Animation callbacks0 ms
  • Style & layout0 ms
  • Render0 ms
1 script ran during this frame
Ran for
71.2 ms
How it started
script tag

Blocking time per script (browser-reported)

How much each script blocked the main thread, derived from the Long Animation Frame API. Each frame's blocking time is split between its scripts by their share of the frame's work, capped at each script's own run time — blocking from work no script owns (HTML parsing, browser internals) is not attributed (older data credits the script that started the frame). The closest answer to "which script should I fix to improve TBT" the platform exposes.

Third party

Third party requests categorised by Third party web version 0.29.2.

Third-party requests19
Tools6
Categories6
Third-party cookies1

Categories

6 categories

Requests by category19

  • survelliance9 req · 5 tools47.4%
  • tag-manager3 req · 1 tool15.8%
  • social3 req · 1 tool15.8%
  • utility2 req · 2 tools10.5%
  • analytics1 req · 1 tool5.3%
  • ad1 req · 1 tool5.3%

Third party requests and tools

6 categories
utilityCloudflareOther Google APIs/SDKs2 requests · 2 tools
tag-managerGoogle Tag Manager3 requests · 1 tool
survellianceGoogle Tag ManagerFacebookGoogle Analytics+ 2 more9 requests · 5 tools
socialFacebook3 requests · 1 tool
analyticsGoogle Analytics1 requests · 1 tool
adGoogle/Doubleclick Ads1 requests · 1 tool

Unmatched third party domains

3 domains

Domains that didn't match any tool in Third party web. If you are sure they are third party domains, please do a PR to that project. You can also fine tune the list using --firstParty.

  • pub-a5c9f998046243af9a6b5fdc3c07d449.r2.dev
  • mpc-prod-27-s6uit34pua-uk.a.run.app
  • telemetry.matchbestsoftware.online
Third party cookies1
.facebook.com1 cookie

First party vs third party

91 first · 20 third party

Transfer size6.2 MB

  • First party1.5 MB23.7%
  • Third party4.7 MB76.3%

Content size9.9 MB

  • First party3.6 MB36.0%
  • Third party6.3 MB64.0%

Requests111

  • First party9182.0%
  • Third party2018.0%

First party requests and sizes per content type

91 requests

Calculated using .*xelta.* (use --firstParty to configure).

ContentHeader SizeTransfer SizeContent SizeRequests
html0 b34.8 KB263.4 KB1
css0 b91.1 KB672.8 KB2
javascript0 b641.1 KB2.0 MB44
image0 b317.4 KB291.0 KB22
font0 b310.6 KB304.1 KB11
favicon0 b9.6 KB8.3 KB1
other0 b459 B151 B1
json0 b90.0 KB80.9 KB7
plain0 b589 B0 b1
TotalN/A1.5 MB3.6 MB91

Third party requests and sizes per content type

20 requests
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b0 b0 b0
css0 b0 b0 b0
javascript0 b745.8 KB2.3 MB6
image2.0 KB4.0 MB4.0 MB8
font0 b0 b0 b0
favicon0 b0 b0 b0
plain0 b841 B2 B5
json0 b0 b0 b1
Total2.0 KB4.7 MB6.3 MB20