Page summary

https://xelta.ai/models/image_generation/gemini-3-1-flash-image-workflow

Tested 2026-09-24 21:32:47 using Chrome 150.0.7871.46 (runtime settings)

SummaryWaterfallMetricsRenderingCoachPageXrayCPUThird party

This page is fast to paint, visually stable and follows best practices, but a little janky to interact with, weak on user privacy and slow to respond from the server.

73 / 100
Coach overall
73 / 100
Performance
91 / 100
Best practice
65 / 100
Privacy

How it loaded →

0 → 6.133 s · median run
Frame at 0 ms
start
Frame at 2400 ms
Largest paint2.400 s
Frame at 3300 ms
3.300 s
Frame at 4300 ms
4.300 s
Frame at 5200 ms
5.200 s
Frame at 6200 ms
Complete6.200 s
1.900 s
First Visual Change
2.865 s
Speed Index
4.633 s
Visual Complete 85%
6.133 s
Last Visual Change
TTFB1.009 sLCP1.972 sTBT432 msCLS0.00

What to act on · top recommendations

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 1.024 s. The total blocking time is 432 ms and 1 long task before first contentful paint with total time of 142 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.

Avoid extra requests by setting cache headers

0 / 100

The page has 11 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 18.5 kB the next access.

Google Web Vitals

min · median · mean · max of 1 run
MetricMinMedianMeanMax
Time To First Byte (TTFB)1.009 s1.009 s1.009 s1.009 s
Largest Contentful Paint (LCP)1.972 s1.972 s1.972 s1.972 s
Cumulative Layout Shift (CLS)0000

Visual Metrics

min · median · mean · max of 1 run
MetricMinMedianMeanMax
First visual change1.900 s1.900 s1.900 s1.900 s
Last visual change6.133 s6.133 s6.133 s6.133 s
Speed index2.865 s2.865 s2.865 s2.865 s
Visual readiness4.233 s4.233 s4.233 s4.233 s
Visual complete 854.633 s4.633 s4.633 s4.633 s
Visual complete 954.767 s4.767 s4.767 s4.767 s
Visual complete 995.267 s5.267 s5.267 s5.267 s

CPU

min · median · mean · max of 1 run
MetricMinMedianMeanMax
Total Blocking Time432 ms432 ms432 ms432 ms
Max Potential FID263 ms263 ms263 ms263 ms
CPU long tasks 10101010
CPU last long task happens at4.516 s4.516 s4.516 s4.516 s

More metrics

min · median · mean · max of 1 run
MetricMinMedianMeanMax
First paint1.316 s1.316 s1.316 s1.316 s
Load event end3.932 s3.932 s3.932 s3.932 s

Waterfall

Run 1 SpeedIndex median

First paintFCPLCPDOMContentLoadedDOM interactiveLoadRender-blockingRedirectError

Rendering

Run 1 · median
0.000 s
0s2s4s6s

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

49 frames

Use --filmstrip.showAll to show all filmstrips.

Frame at 0 ms
0 ms
0 %
Frame at 1.200 s
1.200 s
0 %
Frame at 1.400 s
1.400 s
0 %
Frame at 1.500 s
1.500 s
0 %
Frame at 1.800 s
1.800 s
0 %
Frame at 1.900 s
1.900 s
33 %
Frame at 2.000 s
2.000 s
33 %
Frame at 2.100 s
2.100 s
33 %
Frame at 2.200 s
2.200 s
33 %
Frame at 2.300 s
2.300 s
33 %
Frame at 2.400 s
2.400 s
41 %
Frame at 2.500 s
2.500 s
48 %
Frame at 2.600 s
2.600 s
54 %
Frame at 2.700 s
2.700 s
62 %
Frame at 2.800 s
2.800 s
76 %
Frame at 2.900 s
2.900 s
77 %
Frame at 3.000 s
3.000 s
77 %
Frame at 3.100 s
3.100 s
77 %
Frame at 3.200 s
3.200 s
77 %
Frame at 3.300 s
3.300 s
77 %
Frame at 3.400 s
3.400 s
77 %
Frame at 3.500 s
3.500 s
77 %
Frame at 3.600 s
3.600 s
77 %
Frame at 3.700 s
3.700 s
77 %
Frame at 3.800 s
3.800 s
77 %
Frame at 3.900 s
3.900 s
77 %
Frame at 4.000 s
4.000 s
77 %
Frame at 4.100 s
4.100 s
77 %
Frame at 4.200 s
4.200 s
77 %
Frame at 4.300 s
4.300 s
77 %
Frame at 4.400 s
4.400 s
77 %
Frame at 4.500 s
4.500 s
77 %
Frame at 4.600 s
4.600 s
77 %
Frame at 4.700 s
4.700 s
92 %
Frame at 4.800 s
4.800 s
96 %
Frame at 4.900 s
4.900 s
97 %
Frame at 5.000 s
5.000 s
98 %
Frame at 5.100 s
5.100 s
98 %
Frame at 5.200 s
5.200 s
98 %
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
99 %
Frame at 5.800 s
5.800 s
99 %
Frame at 5.900 s
5.900 s
99 %
Frame at 6.000 s
6.000 s
99 %
Frame at 6.100 s
6.100 s
99 %
Frame at 6.200 s
6.200 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?

The server dominated the wait. The first byte took 1.009 s (77 % of the time to First Contentful Paint). Nothing can render before it arrives, and Google Web Vitals considers a TTFB over 800 ms in need of improvement. See the request timing on the Waterfall tab. First paint landed at 1.316 s. The largest paint followed at 1.972 s.

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

Render blocking requests

33 requests · 512.2 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
xelta.ai · TTFB 1.009 s
269 ms
741 B268 ms
2cc4dk9_-w4i-.jspotentially blocking
javascript · xelta.ai
182 ms
73.3 KB182 ms
turbopack-1vqwnc7wbbpm2.jspotentially blocking
javascript · xelta.ai
165 ms
6.6 KB165 ms
1rttzs2jjmcrm.jspotentially blocking
javascript · xelta.ai
162 ms
44.0 KB162 ms
0qyja2b6pvkmf.jspotentially blocking
javascript · xelta.ai
161 ms
9.9 KB161 ms
3mvjwj-2y-dir.jspotentially blocking
javascript · xelta.ai
159 ms
45.2 KB159 ms
1rsxdij5pgn2k.jspotentially blocking
javascript · xelta.ai
159 ms
23.4 KB159 ms
00up96pc24a4e.jspotentially blocking
javascript · xelta.ai
159 ms
10.4 KB159 ms
25ym4jnna99b5.jspotentially blocking
javascript · xelta.ai
155 ms
48.8 KB155 ms
25 more requests
all done by 1.228 s
250.7 KB
web font · xelta.ai · finished after first paint
256 ms
65.5 KB256 ms
web font · xelta.ai · finished after first paint
227 ms
8.6 KB227 ms
web font · fonts.gstatic.com · finished after first paint
643 ms · past LCP
8.1 KB643 ms
0493 ms986 msFCP 1.316 sLCP 1.972 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.

Performance advice

73
2 errors10 warnings3 info
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 1.024 s. The total blocking time is 432 ms and 1 long task before first contentful paint with total time of 142 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)Avoid extra requests by setting cache headerscacheHeaders

The page has 11 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 18.5 kB 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
warn(0)Avoid redirecting the main documentdocumentRedirect

The main document gets redirected 1 time(s). Remove those redirect and make the page faster!

You should never ever redirect the main document, because it will make the page load slower for the user. Well, you should redirect the user if the user tries to use HTTP and there's an HTTPS version of the page. The coach checks for that. :)

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

The total JavaScript transfer size is 1.6 MB and the uncompressed size is 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://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba178836298749510.1 KB29.6 KB
https://xelta.ai/_next/static/chunks/0_cis5bf89bk3.js3.7 KB9.3 KB
https://xelta.ai/_next/static/chunks/3er0xpd5wsvv-.js11.3 KB38.9 KB
https://xelta.ai/_next/static/chunks/2cc4dk9_-w4i-.js73.3 KB232.0 KB
https://xelta.ai/_next/static/chunks/25ym4jnna99b5.js48.8 KB171.2 KB
https://xelta.ai/_next/static/chunks/turbopack-1vqwnc7wbbpm2.js6.6 KB18.4 KB
https://xelta.ai/_next/static/chunks/2gtwcux9_e_3q.js6.5 KB20.8 KB
https://xelta.ai/_next/static/chunks/2uoulaw6kucli.js10.1 KB26.2 KB
https://xelta.ai/_next/static/chunks/3wuo8wdooey29.js8.4 KB34.0 KB
https://xelta.ai/_next/static/chunks/403qh4uu73dc5.js5.9 KB14.3 KB
https://xelta.ai/_next/static/chunks/1kcz29pl_q05f.js6.8 KB17.2 KB
https://xelta.ai/_next/static/chunks/3harezu8knhoz.js8.0 KB21.0 KB
https://xelta.ai/_next/static/chunks/3nr_dzzgm0opf.js9.9 KB26.9 KB
https://xelta.ai/_next/static/chunks/00up96pc24a4e.js10.4 KB25.8 KB
https://xelta.ai/_next/static/chunks/444qa-9lnnm8j.js9.9 KB24.2 KB
https://xelta.ai/_next/static/chunks/0s0hfw1em6oem.js10.4 KB27.9 KB
https://xelta.ai/_next/static/chunks/34w5esdmj6s16.js15.1 KB45.8 KB
https://xelta.ai/_next/static/chunks/1rttzs2jjmcrm.js44.0 KB140.6 KB
https://xelta.ai/_next/static/chunks/1spzo3397ba2t.js6.5 KB14.5 KB
https://xelta.ai/_next/static/chunks/2f2i__v854m6r.js9.2 KB30.0 KB
https://xelta.ai/_next/static/chunks/15jgvcbmyanuo.js18.1 KB54.6 KB
https://xelta.ai/_next/static/chunks/2_mphrdu04vzv.js13.8 KB39.3 KB
https://xelta.ai/_next/static/chunks/3nm_prpbuhl-p.js19.8 KB55.4 KB
https://xelta.ai/_next/static/chunks/2qwl8sgb3v89v.js19.7 KB62.0 KB
https://xelta.ai/_next/static/chunks/1vagg_skbh5uc.js2.0 KB1.7 KB
https://xelta.ai/_next/static/chunks/0r_-zfn80zo41.js2.3 KB2.7 KB
https://xelta.ai/_next/static/chunks/3i-r83vn-7w_3.js1.4 KB971 B
https://xelta.ai/_next/static/chunks/2dknsmb64ir51.js8.1 KB30.7 KB
https://xelta.ai/_next/static/chunks/1up2sajt-q-8n.js11.1 KB35.6 KB
https://xelta.ai/_next/static/chunks/0whi-u2z_jxb8.js9.6 KB28.6 KB
https://xelta.ai/_next/static/chunks/36h4r9duhyjke.js11.1 KB37.2 KB
https://xelta.ai/_next/static/chunks/3mvjwj-2y-dir.js45.2 KB169.1 KB
https://xelta.ai/_next/static/chunks/3-75ace_v0-18.js15.5 KB45.1 KB
https://xelta.ai/_next/static/chunks/1rsxdij5pgn2k.js23.4 KB105.5 KB
https://xelta.ai/_next/static/chunks/0qyja2b6pvkmf.js9.9 KB28.2 KB
https://xelta.ai/_next/static/chunks/0ga4rs1yp22vv.js2.4 KB3.0 KB
https://xelta.ai/_next/static/chunks/3pzd7gqy3lw2b.js10.6 KB36.4 KB
https://xelta.ai/_next/static/chunks/1e2gzhrdpsa04.js6.1 KB16.3 KB
https://xelta.ai/_next/static/chunks/3mtsdqo46ttgs.js7.6 KB18.5 KB
https://xelta.ai/_next/static/chunks/1nlwvy4lxglg9.js1.2 KB151 B
https://xelta.ai/_next/static/chunks/3yloscmx17qc-.js2.6 KB3.9 KB
https://xelta.ai/_next/static/chunks/16aoeha2a-odl.js5.9 KB15.8 KB
https://xelta.ai/_next/static/chunks/3aea5tta4zd_f.js1.2 KB151 B
https://xelta.ai/_next/static/chunks/00jz7czrjjgum.js9.3 KB29.7 KB
https://xelta.ai/_next/static/chunks/2oue1a6qt5s20.js1.4 KB493 B
https://xelta.ai/_next/static/chunks/3z2ezzsj1qtf7.js1.7 KB1.2 KB
https://xelta.ai/_next/static/chunks/3c9-jx0jhg1zb.js2.1 KB1.8 KB
https://xelta.ai/analytics/gtm.js1.6 KB403 B
https://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP187.6 KB569.9 KB
https://xelta.ai/analytics/ga4.js1.4 KB144 B
https://xelta.ai/analytics/meta-pixel.js1.6 KB514 B
https://xelta.ai/_next/static/chunks/1ki4hltmjvw2d.js77.6 KB253.9 KB
https://www.googletagmanager.com/gtm.js?id=GTM-5XNS5NQ2115.3 KB324.2 KB
https://connect.facebook.net/en_US/fbevents.js111.7 KB414.7 KB
https://xelta.ai/_next/static/chunks/3a5v007d95ttp.js41.8 KB139.5 KB
https://xelta.ai/_next/static/chunks/3f1tw02kuplod.js3.3 KB6.2 KB
https://xelta.ai/_next/static/chunks/2k5vpzc_p9jpq.js35.3 KB106.7 KB
https://connect.facebook.net/signals/config/1123404090023729.../1123404090023729139.6 KB497.5 KB
https://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP&cx=c&gtm=4e69n0187.6 KB569.9 KB
https://xelta.ai/_next/static/chunks/28r3ari2she5h.js1.2 KB217 B
https://xelta.ai/_next/static/chunks/0ibqqj5n22681.js10.4 KB31.0 KB
https://xelta.ai/_next/static/chunks/38cqstpd1yycs.js47.0 KB206.7 KB
warn(10)Don't scale images in the browseravoidScalingImages

The page has 9 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
infoAvoid too many fontsfewFonts

The page has 6 font requests. Do you really need them? What value does the fonts give the user?

How many fonts do you need on a page for the user to get the message? Fonts can slow down the rendering of content, try to avoid loading too many of them because worst case it can make the text invisible until they are loaded (FOIT—flash of invisible text), best case they will flicker the text content when they arrive.

Offenders
warn(50)Total CSS size shouldn't be too bigcssSize

The total CSS transfer size is 97.7 kB and uncompressed size is 708.2 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://xelta.ai/_next/static/chunks/2g7-gn0hh0mu5.css90.0 KB658.1 KB
https://xelta.ai/_next/static/chunks/24aqi5k581skx.css4.1 KB24.5 KB
https://fonts.googleapis.com/css2...ogleapis.com/css21.4 KB9.0 KB
warn(50)Don't use private headers on static contentprivateAssets

The page has 5 requests with private headers. 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 28 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
error(90)Avoid Frontend single point of failuresspof

The page has 1 request inside of the head that can cause a SPOF (single point of failure). Load them asynchronously or move them outside of the document head.

A page can be stopped from loading in the browser if a single JavaScript, CSS, and in some cases a font, couldn't be fetched or is loading really slowly (the white screen of death). That is a scenario you really want to avoid. Never load 3rd-party components synchronously inside of the head tag.

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://xelta.ai/models/image-generation/gemini-3-1-flash-image-workflow31.4 KB229.0 KB
infoMake each CSS response smalloptimalCssSize

https://xelta.ai/_next/static/chunks/2g7-gn0hh0mu5.css size is 92.1 kB (92126) 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://xelta.ai/_next/static/chunks/2g7-gn0hh0mu5.css90.0 KB658.1 KB
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

91
1 warning3 info
infoAvoid unnecessary headersunnecessaryHeaders

There are 1 response that sets a p3p header. There are 7 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 118 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
warn(50)Avoid too many third party requeststhirdParty

The page do 13% requests to third party domains (15 requests and 780.8 kB). First party is 105 requests and 1.4 MB. The regex .*xelta.* was used to calculate first/third party requests.

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

infoAvoid use too many response headersmanyHeaders

https://xelta.ai/api...nts/active-banner has 34 headers.https://xelta.ai/api...cms/announcements has 34 headers.https://xelta.ai/api...nt/public/pricing has 34 headers.https://xelta.ai/api...ge_generation/all has 31 headers.https://xelta.ai/api...sh-image-workflow has 31 headers.https://xelta.ai/api/cms/maintenance has 33 headers.https://xelta.ai/api/geo has 32 headers.

Avoid send too many response headers.

Offenders
infoDo not send too long headerslongHeaders

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

Privacy advice

65
7 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
warn(0)Use a strict Content-Security-Policy header to mitigate cross-site scripting (XSS) attacks.contentSecurityPolicyHeader

Set a Content-Security-Policy header to mitigate cross-site scripting attacks. You can start with a Content-Security-Policy-Report-Only header, which only reports violations rather than blocking them.

A Content-Security-Policy response header tells the browser which sources of script, style, and other content are allowed. The most effective form is a strict CSP using nonces or hashes together with strict-dynamic; the worst is a missing header, with unsafe-inline and unsafe-eval close behind. https://web.dev/articles/strict-csp

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)Set a Permissions-Policy header to control which browser features the page can use.permissionsPolicyHeader

Set a Permissions-Policy header to control which browser features the page can use.

The Permissions-Policy response header (the successor to Feature-Policy) lets a site explicitly opt in or out of powerful browser features such as camera, microphone, geolocation, payment and clipboard. Setting a strict policy reduces the attack surface and limits what embedded third parties can do. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Permissions-Policy

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

The page has 10% requests that are 3rd party (12 requests with a size of 780.5 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 11 survelliance requests and uses 6 survelliance tools. The page do 11 surveillance requests and uses 6 surveillance tools. 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 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.

TitleGemini 3.1 Flash Image - AI ModelThe document title, shown in the browser tab and used by search results.
Layout viewport1350 × 3356 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 elements2,047Very large, slows layout and styleTotal HTML elements. Fewer means less for the browser to style, lay out and paint.
Avg DOM depth12How deeply elements are nested on average.
Max DOM depth22The deepest nesting on the page. Deep branches cost more style recalculation.
Iframes1Embedded documents. Each is a separate page the browser loads and renders.
Script tags71Number 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 storage1.1 KBData the page saved in localStorage, kept across visits.
Session storage565 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://fonts.googleapis.com/
  • https://fonts.gstatic.com/
  • https://media.xelta.ai/

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

19 tools

Data collected using Third Party Web version 0.29.2.

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

Data from run 1

Visual Metrics

Visual milestones

all times from navigation start
Speed Index2.87 show quickly the page looked done
First Visual Change1.90 sfirst paint reaches the screen
Last Visual Change6.13 sscreen stops changing · 4.23 s after first
nothing painted yet
≥95% rendered
≥99%
First Visual Change1.90 s
Visual Complete 85%4.63 s
Visual Complete 95%4.77 s
Visual Complete 99%5.27 s
Last Visual Change6.13 s
Visual Readiness4.23 s· first to last change
02.0 s4.0 s
Content milestones
Perception index
Visual progress
Visual progress at 0 s0.0s
Visual progress at 2.1 s2.1s
Visual progress at 2.8 s2.8s
Visual progress at 3.5 s3.5s
Visual progress at 4.1 s4.1s
Visual progress at 4.8 s4.8s
Visual progress at 5.5 s5.5s
Visual progress at 6.2 s6.2s
FCP1.32s
LCP1.97s
VC854.63s
Long tasks
0.0s1.2s2.5s3.7s5.0s6.2s

Google Web Vitals

from run 1
1.009 sTTFB
Needs improvement
432 msTBT
Needs improvement

Largest Contentful Paint

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

1.972 sLCP render time

Phase breakdown

  • TTFB1.009 s
  • Resource load delay0 ms
  • Resource load duration0 ms
  • Element render delay963 ms

Element

Size (w × h)
28721
Load time
0 ms
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.

Cumulative Layout Shift

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

0.000cumulative layout shift score

No layout shifts were detected on this page.

Browser Metrics

Navigation Timing
Extra timings
TTFB1.009 s

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 msMISS
cfEdge63 ms–
cfOrigin664 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 requests120
Total domains12
Transfer size2.1 MB
Content size6.1 MB
Missing compression1
Cookies91 third-party

Main document

status 200 · 1 redirect

https://xelta.ai/models/image-generation/gemini-3-1-flash-image-workflow

HeaderValue
alt-svch3=":443"; ma=86400
cf-cache-statusBYPASS
cf-raya404e76859a60769-DEL
dateThu, 24 Sep 2026 21:32:49 GMT
expect-ctmax-age=86400, enforce
location/models/image-generation/gemini-3-1-flash-image-workflow
nel{"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
referrer-policysame-origin strict-origin-when-cross-origin
refresh0;url=/models/image-generation/gemini-3-1-flash-image-workflow
report-to{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=TI2SSQ5XqWjYuPdcCQStIvM6wmx%2B82PkBxEcKwFo6l3pQQ2%2BpNvdDCKH0DUfMSqsNRCUYMPsbPAC5fy8tVOEAveiYLrhC9XBP4acNa4se6fzlrj7qmJavsei"}]}
servercloudflare
server-timingcfCacheStatus;desc="BYPASS" cfEdge;dur=118,cfOrigin;dur=117
speculation-rules"/cdn-cgi/speculation"
strict-transport-securitymax-age=31536000; includeSubDomains; preload
varyaccept-encoding
x-content-type-optionsnosniff
x-frame-optionsSAMEORIGIN
x-xss-protection1; mode=block

Response codes

200
11495.0%
202
10.8%
204
43.3%
308
10.8%

Largest assets on the page (by transfer size)

Top 20 of 120

Requests and sizes per content type

9 types

Transfer size2.1 MB

  • javascript71.7%
  • image14.1%
  • font6.9%
  • css4.4%
  • html1.5%
  • json0.87%
  • favicon0.45%
  • plain0.06%
  • other0.03%

Content size6.1 MB

  • javascript78.3%
  • css11.0%
  • image4.3%
  • html3.6%
  • font2.3%
  • json0.28%
  • favicon0.13%
  • other0.00%
  • plain0.00%

Requests119

  • javascript52.1%
  • image24.4%
  • json8.4%
  • font5.0%
  • plain5.0%
  • css2.5%
  • html0.84%
  • favicon0.84%
  • other0.84%
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b31.4 KB229.0 KB1
css0 b95.4 KB691.6 KB3
javascript0 b1.5 MB4.8 MB62
image0 b303.7 KB272.1 KB29
font0 b148.2 KB142.4 KB6
favicon0 b9.6 KB8.3 KB1
other0 b726 B151 B1
json0 b18.8 KB17.7 KB10
plain0 b1.4 KB2 B6
Total0 b2.1 MB6.1 MB119

Data per domain

12 domains
DomainTotal download timeTransfer SizeContent SizeRequests
xelta.ai20.171 s1.4 MB3.8 MB105
fonts.googleapis.com146 ms1.4 KB9.0 KB1
static.cloudflareinsights.com86 ms10.1 KB29.6 KB1
fonts.gstatic.com654 ms8.1 KB7.6 KB1
www.googletagmanager.com932 ms490.5 KB1.4 MB3
connect.facebook.net94 ms251.3 KB912.2 KB2
mpc-prod-27-s6uit34pua-uk.a.run.app351 msN/A0 b1
analytics.google.com116 msN/A0 b1
stats.g.doubleclick.net116 ms553 B0 b1
www.google.co.in118 ms408 B42 B1
telemetry.matchbestsoftware.online165 ms286 B2 B2
www.facebook.com45 msN/A0 b1

Expires & last-modified statistics

typeminmedianmax
Expires0 seconds1 year1 year
Last modified26 minutes1 day1 year

Requests loaded after onLoad event

27 requests

Includes requests done after load event end.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript963.0 KB15
image8.5 KB3
font0 b0
favicon9.6 KB1
plain1.4 KB6
json1.8 KB2
Total984.3 KB27

Requests loaded after onContentLoad

58 requests

Includes requests done after DOM content loaded.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript1015.0 KB27
image146.6 KB14
font8.1 KB1
favicon9.6 KB1
json16.8 KB9
plain1.4 KB6
Total1.2 MB58

CPU

https://xelta.ai/_next/static/chunks/2cc4dk9_-w4i-.js is responsible for 64% of blocking time
300 ms of 470 ms total. Defer it, replace it with a lighter alternative, or move its work off the main thread to recover most of your TBT.
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.

TBT432 ms
Max potential input delay263 ms
Total long tasks10
Total time1.024 s
Last task at4.516 s
Before first paint142 ms1 task
Before FCP142 ms1 task
Before LCP560 ms4 tasks
After load464 ms6 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 frames12showing the 10 with the most blocking time
Blocking time588.7 msacross all long frames — what hurts INP and TBT
Forced style & layout26.5 msscripts reading layout mid-frame
Blocking before LCP417 msdelaying the largest paint — fix these first
Blocking after load171.7 msafter the load event — didn't delay page load
Input waiting1 framea real interaction was delayed (INP)

What to fix first

ScriptFramesTime runningBlocking (share by run time)Forced style & layoutTriggered by
2cc4dk9_-w4i-.js3418.7 ms300.3 ms26.3 msevent handler, script tag
11234040900237293rd party1112.7 ms63.2 ms0.2 msscript tag
fbevents.js3rd party1105.6 ms56.3 ms–script tag
js3rd party2127 ms27.8 ms–script tag, timer or animation callback
1ki4hltmjvw2d.js167.7 ms16.8 ms–script tag
gtm.js3rd party153.9 ms4.5 ms–script tag
3nr_dzzgm0opf.js15.1 ms1.3 ms–timer or animation callback

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 · 316 msat 1.406 s · before LCP
blocking 252.8 ms
  • Scripts & other work276.1 ms
  • Animation callbacks3.2 ms
  • Style & layout36.7 ms
  • Render0 ms
1 script ran during this frame
Ran for
263 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 #2 · 240.8 msat 1.042 s · before LCP
blocking 103.7 ms
  • Scripts & other work104.2 ms
  • Animation callbacks0.8 ms
  • Style & layout135.8 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 #3 · 113.6 msat 4.322 s · after load
blocking 63.4 ms
  • Scripts & other work113 ms
  • Animation callbacks0.1 ms
  • Style & layout0.5 ms
  • Render0 ms
1 script ran during this frame · forced style & layout 0.2 ms
Ran for
112.7 ms
Forced style and layout
0.2 ms
How it started
script tag
Long animation frame #4 · 107.4 msat 1.797 s · before LCP
input was waitingblocking 57 ms
  • Scripts & other work104.2 ms
  • Animation callbacks2.6 ms
  • Style & layout0.6 ms
  • Render0 ms
1 script ran during this frame · forced style & layout 26.3 ms
Ran for
103.8 ms
Forced style and layout
26.3 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 #5 · 106.8 msat 4.113 s · after load
blocking 56.5 ms
  • Scripts & other work106 ms
  • Animation callbacks0.1 ms
  • Style & layout0.7 ms
  • Render0 ms
1 script ran during this frame
fbevents.js3rd party
Ran for
105.6 ms
How it started
script tag
Long animation frame #6 · 71.7 msat 4.443 s · after load
blocking 20.1 ms
  • Scripts & other work71.3 ms
  • Animation callbacks0.2 ms
  • Style & layout0.2 ms
  • Render0 ms
1 script ran during this frame
js3rd party
Ran for
69.6 ms
How it started
script tag
Long animation frame #7 · 75.3 msat 3.988 s · after load
blocking 18.5 ms
  • Scripts & other work74.7 ms
  • Animation callbacks0.3 ms
  • Style & layout0.3 ms
  • Render0 ms
2 scripts ran during this frame
Ran for
5.1 ms
Started by
IdleRequestCallback
How it started
timer or animation callback
Position in source
character 21310 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Ran for
67.7 ms
How it started
script tag
Long animation frame #8 · 59.5 msat 4.516 s · after load
blocking 8.4 ms
  • Scripts & other work58.6 ms
  • Animation callbacks0.4 ms
  • Style & layout0.5 ms
  • Render0 ms
1 script ran during this frame
js3rd party
Ran for
57.4 ms
Started by
TimerHandler:setTimeout
How it started
timer or animation callback
Long animation frame #9 · 58.3 msat 4.251 s · after load
blocking 4.8 ms
  • Scripts & other work57.8 ms
  • Animation callbacks0.2 ms
  • Style & layout0.3 ms
  • Render0 ms
1 script ran during this frame
gtm.js3rd party
Ran for
53.9 ms
How it started
script tag
Long animation frame #10 · 68.5 msat 1.319 s · before LCP
blocking 3.5 ms
  • Scripts & other work67.8 ms
  • Animation callbacks0.6 ms
  • Style & layout0.1 ms
  • Render0 ms
2 scripts ran during this frame
Ran for
6 ms
How it started
module script
Ran for
51.9 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.

Forced layout per script

Each long animation frame reports how much time each script spent forcing synchronous style and layout, i.e. JavaScript reading layout-triggering properties mid-execution. Same actionable answer as forced reflows above but measured directly by the browser instead of inferred from the trace.

Scripts forcing layout

1 of 2 scripts

Third party

Third party requests categorised by Third party web version 0.29.2.

Third-party requests23
Tools7
Categories7
Third-party cookies1

Categories

7 categories

Requests by category23

  • survelliance11 req · 6 tools47.8%
  • tag-manager3 req · 1 tool13.0%
  • social3 req · 1 tool13.0%
  • cdn2 req · 1 tool8.7%
  • utility2 req · 2 tools8.7%
  • analytics1 req · 1 tool4.3%
  • ad1 req · 1 tool4.3%

Third party requests and tools

7 categories
cdnGoogle Fonts2 requests · 1 tool
survellianceGoogle FontsGoogle Tag ManagerFacebook+ 3 more11 requests · 6 tools
utilityCloudflareOther Google APIs/SDKs2 requests · 2 tools
tag-managerGoogle Tag Manager3 requests · 1 tool
socialFacebook3 requests · 1 tool
analyticsGoogle Analytics1 requests · 1 tool
adGoogle/Doubleclick Ads1 requests · 1 tool

Unmatched third party domains

2 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.

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

First party vs third party

105 first · 15 third party

Transfer size2.1 MB

  • First party1.4 MB64.5%
  • Third party762.5 KB35.5%

Content size6.1 MB

  • First party3.8 MB61.4%
  • Third party2.4 MB38.6%

Requests120

  • First party10587.5%
  • Third party1512.5%

First party requests and sizes per content type

105 requests

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

ContentHeader SizeTransfer SizeContent SizeRequests
html0 b31.4 KB229.0 KB1
css0 b94.1 KB682.6 KB2
javascript0 b789.2 KB2.4 MB56
image0 b303.3 KB272.1 KB28
font0 b140.1 KB134.9 KB5
favicon0 b9.6 KB8.3 KB1
other0 b726 B151 B1
json0 b18.8 KB17.7 KB9
plain0 b573 B0 b1
TotalN/A1.4 MB3.8 MB105

Third party requests and sizes per content type

15 requests
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b0 b0 b0
css0 b1.4 KB9.0 KB1
javascript0 b751.8 KB2.3 MB6
image0 b408 B42 B1
font0 b8.1 KB7.6 KB1
favicon0 b0 b0 b0
json0 b0 b0 b1
plain0 b839 B2 B5
TotalN/A762.5 KB2.4 MB15