Page summary

https://xelta.ai/models/video_generation/wan-text-to-video-22-workflow

Tested 2026-09-17 17:09:23 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 and weak on user privacy.

74 / 100
Coach overall
77 / 100
Performance
91 / 100
Best practice
65 / 100
Privacy

How it loaded →

0 → 4.437 s · median run
Frame at 0 ms
start
Frame at 1400 ms
1.400 s
Frame at 2200 ms
2.200 s
Frame at 2900 ms
Largest paint2.900 s
Frame at 3700 ms
3.700 s
Frame at 4500 ms
Complete4.500 s
774 ms
First Visual Change
1.700 s
Speed Index
2.286 s
Visual Complete 85%
4.437 s
Last Visual Change
TTFB553 msLCP2.328 sTBT224 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 8 CPU long tasks with the total of 639 ms. The total blocking time is 224 ms and 1 long task before first contentful paint with total time of 65 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 redirecting the main document

0 / 100

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

Google Web Vitals

min · median · mean · max of 1 run
MetricMinMedianMeanMax
Time To First Byte (TTFB)553 ms553 ms553 ms553 ms
Largest Contentful Paint (LCP)2.328 s2.328 s2.328 s2.328 s
Cumulative Layout Shift (CLS)0.00010.00010.00010.0001

Visual Metrics

min · median · mean · max of 1 run
MetricMinMedianMeanMax
First visual change774 ms774 ms774 ms774 ms
Last visual change4.437 s4.437 s4.437 s4.437 s
Speed index1.700 s1.700 s1.700 s1.700 s
Visual readiness3.663 s3.663 s3.663 s3.663 s
Visual complete 852.286 s2.286 s2.286 s2.286 s
Visual complete 952.286 s2.286 s2.286 s2.286 s
Visual complete 992.723 s2.723 s2.723 s2.723 s

CPU

min · median · mean · max of 1 run
MetricMinMedianMeanMax
Total Blocking Time224 ms224 ms224 ms224 ms
Max Potential FID103 ms103 ms103 ms103 ms
CPU long tasks 8888
CPU last long task happens at1.945 s1.945 s1.945 s1.945 s

More metrics

min · median · mean · max of 1 run
MetricMinMedianMeanMax
First paint780 ms780 ms780 ms780 ms
Load event end937 ms937 ms937 ms937 ms

Waterfall

Run 1 SpeedIndex median

First paintFCPLCPDOMContentLoadedDOM interactiveLoadRender-blockingRedirectError

Rendering

Run 1 · median
0.000 s
0s1s2s3s4s

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

40 frames

Use --filmstrip.showAll to show all filmstrips.

Frame at 0 ms
0 ms
0 %
Frame at 700 ms
700 ms
0 %
Frame at 800 ms
800 ms
22 %
Frame at 900 ms
900 ms
22 %
Frame at 1.000 s
1.000 s
22 %
Frame at 1.100 s
1.100 s
22 %
Frame at 1.200 s
1.200 s
22 %
Frame at 1.300 s
1.300 s
22 %
Frame at 1.400 s
1.400 s
22 %
Frame at 1.500 s
1.500 s
22 %
Frame at 1.600 s
1.600 s
31 %
Frame at 1.700 s
1.700 s
49 %
Frame at 1.800 s
1.800 s
52 %
Frame at 1.900 s
1.900 s
70 %
Frame at 2.000 s
2.000 s
70 %
Frame at 2.100 s
2.100 s
71 %
Frame at 2.200 s
2.200 s
71 %
Frame at 2.300 s
2.300 s
98 %
Frame at 2.400 s
2.400 s
98 %
Frame at 2.500 s
2.500 s
98 %
Frame at 2.600 s
2.600 s
98 %
Frame at 2.700 s
2.700 s
98 %
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
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 780 ms on a 553 ms first byte; the 2 render-blocking requests were done by 663 ms and the remaining ~117 ms is style and layout work. The largest paint followed at 2.328 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 · 555.4 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 553 ms
114 ms
737 B113 ms
css · xelta.ai
49 ms
4.4 KB49 ms
css · xelta.ai
47 ms
88.2 KB47 ms
1rttzs2jjmcrm.jspotentially blocking
javascript · xelta.ai
141 ms
44.0 KB141 ms
12bbkchpzeqfu.jspotentially blocking
javascript · xelta.ai
139 ms
43.1 KB139 ms
2qwl8sgb3v89v.jspotentially blocking
javascript · xelta.ai
137 ms
19.7 KB137 ms
17jp2fut2e48l.jspotentially blocking
javascript · xelta.ai
137 ms
18.1 KB137 ms
120g0hpahlx34.jspotentially blocking
javascript · xelta.ai
137 ms
23.2 KB137 ms
3rjq2t8-kpk-e.jspotentially blocking
javascript · xelta.ai
132 ms
12.1 KB132 ms
24 more requests
all done by 769 ms
302.5 KB
LCP resource
generated-video-1762160650886.mp4 — downloaded by 2.071 s, rendered at 2.328 s
511 ms
667 B511 ms
web font · xelta.ai · finished after first paint
31 ms
65.5 KB31 ms
web font · xelta.ai · finished after first paint
30 ms
8.6 KB30 ms
web font · xelta.ai · finished after first paint
104 ms
37.7 KB104 ms
01.164 s1.746 sFCP 780 msLCP 2.328 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

77
1 error10 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 8 CPU long tasks with the total of 639 ms. The total blocking time is 224 ms and 1 long task before first contentful paint with total time of 65 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
  • unknown
  • unknown
  • self
  • self
  • self
  • self
  • self
  • self
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 1.4 MB and the uncompressed size is 4.4 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://xelta.ai/_next/static/chunks/0_cis5bf89bk3.js3.7 KB9.3 KB
https://xelta.ai/_next/static/chunks/3ur639cpt-7ui.js11.3 KB38.9 KB
https://xelta.ai/_next/static/chunks/3-w1slqtx4wge.js73.3 KB232.0 KB
https://xelta.ai/_next/static/chunks/25ym4jnna99b5.js48.8 KB171.2 KB
https://xelta.ai/_next/static/chunks/turbopack-0qliv_on3yvhn.js6.6 KB18.4 KB
https://xelta.ai/_next/static/chunks/40ecen_51u8zc.js6.5 KB20.8 KB
https://xelta.ai/_next/static/chunks/2uoulaw6kucli.js10.1 KB26.2 KB
https://xelta.ai/_next/static/chunks/403qh4uu73dc5.js5.9 KB14.3 KB
https://xelta.ai/_next/static/chunks/444qa-9lnnm8j.js9.9 KB24.2 KB
https://xelta.ai/_next/static/chunks/1s0vi8ebq1ha0.js11.3 KB31.2 KB
https://xelta.ai/_next/static/chunks/1vr-_-ai-9wxy.js8.0 KB21.0 KB
https://xelta.ai/_next/static/chunks/1321f5pb3peoq.js8.4 KB33.9 KB
https://xelta.ai/_next/static/chunks/00up96pc24a4e.js10.4 KB25.8 KB
https://xelta.ai/_next/static/chunks/3wmj0jv19y0e5.js15.0 KB45.5 KB
https://xelta.ai/_next/static/chunks/2qwl8sgb3v89v.js19.7 KB62.0 KB
https://xelta.ai/_next/static/chunks/0v-y_275lo0v3.js10.8 KB29.1 KB
https://xelta.ai/_next/static/chunks/2_mphrdu04vzv.js13.8 KB39.3 KB
https://xelta.ai/_next/static/chunks/1spzo3397ba2t.js6.5 KB14.5 KB
https://xelta.ai/_next/static/chunks/1rttzs2jjmcrm.js44.0 KB140.6 KB
https://xelta.ai/_next/static/chunks/17jp2fut2e48l.js18.1 KB54.6 KB
https://xelta.ai/_next/static/chunks/120g0hpahlx34.js23.2 KB66.2 KB
https://xelta.ai/_next/static/chunks/2f2i__v854m6r.js9.2 KB30.0 KB
https://xelta.ai/_next/static/chunks/21qxs2_9klwty.js1.8 KB1.4 KB
https://xelta.ai/_next/static/chunks/1yoy6xy7rnaz0.js2.1 KB2.2 KB
https://xelta.ai/_next/static/chunks/0r_-zfn80zo41.js2.3 KB2.7 KB
https://xelta.ai/_next/static/chunks/1jwfrutmzsfv7.js1.5 KB1.0 KB
https://xelta.ai/_next/static/chunks/0qyja2b6pvkmf.js9.9 KB28.2 KB
https://xelta.ai/_next/static/chunks/2dknsmb64ir51.js8.1 KB30.7 KB
https://xelta.ai/_next/static/chunks/36h4r9duhyjke.js11.1 KB37.2 KB
https://xelta.ai/_next/static/chunks/3rjq2t8-kpk-e.js12.1 KB36.7 KB
https://xelta.ai/_next/static/chunks/12bbkchpzeqfu.js43.1 KB178.2 KB
https://xelta.ai/_next/static/chunks/073hu694tbfa2.js3.9 KB7.6 KB
https://xelta.ai/_next/static/chunks/3ji_lutiqykw4.js17.5 KB64.4 KB
https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba178836298749510.1 KB29.6 KB
https://xelta.ai/_next/static/chunks/0ga4rs1yp22vv.js2.4 KB3.0 KB
https://xelta.ai/_next/static/chunks/2tldojfjwreij.js10.6 KB36.2 KB
https://xelta.ai/_next/static/chunks/2aamqngoqh57z.js6.1 KB16.1 KB
https://xelta.ai/_next/static/chunks/2oue1a6qt5s20.js1.4 KB493 B
https://xelta.ai/_next/static/chunks/2qqm7elam7bva.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-CPG3NLBKHP187.5 KB569.2 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://xelta.ai/_next/static/chunks/16orvb4qnjgm7.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://www.googletagmanager.com/gtm.js?id=GTM-5XNS5NQ2115.0 KB324.6 KB
https://connect.facebook.net/en_US/fbevents.js110.8 KB411.7 KB
https://xelta.ai/_next/static/chunks/11szm_a0s3dji.js8.6 KB22.6 KB
https://xelta.ai/_next/static/chunks/1p_d3vq1nz57f.js1.2 KB254 B
https://xelta.ai/_next/static/chunks/23yz-m6sxd_k2.js9.4 KB29.3 KB
https://xelta.ai/_next/static/chunks/3yloscmx17qc-.js2.6 KB3.9 KB
https://xelta.ai/_next/static/chunks/31gu7h_0uwf79.js5.8 KB15.6 KB
https://xelta.ai/_next/static/chunks/0g_2av48rckam.js1.2 KB254 B
https://xelta.ai/_next/static/chunks/3j8vjeqwjqt1b.js16.6 KB53.7 KB
https://connect.facebook.net/signals/config/1123404090023729.../1123404090023729139.4 KB496.9 KB
https://xelta.ai/_next/static/chunks/28r3ari2she5h.js1.2 KB217 B
https://xelta.ai/_next/static/chunks/34zqwff648hvy.js10.7 KB33.9 KB
https://xelta.ai/_next/static/chunks/0ibqqj5n22681.js10.4 KB31.0 KB
https://xelta.ai/_next/static/chunks/3dh4veiardltk.js47.0 KB206.7 KB
warn(10)Avoid extra requests by setting cache headerscacheHeaders

The page has 9 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 14.7 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
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 94.9 kB and uncompressed size is 692 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/18ag8ln2hb3l6.css88.2 KB646.8 KB
https://xelta.ai/_next/static/chunks/1eteo4yyc63ev.css4.4 KB28.9 KB
warn(70)Don't use private headers on static contentprivateAssets

The page has 3 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 25 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)Don't scale images in the browseravoidScalingImages

The page has 1 image 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(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/video-generation/wan-text-to-video-22-workflow29.9 KB220.0 KB
infoMake each CSS response smalloptimalCssSize

https://xelta.ai/_next/static/chunks/18ag8ln2hb3l6.css size is 90.4 kB (90351) 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/18ag8ln2hb3l6.css88.2 KB646.8 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 4 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 114 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 11% requests to third party domains (13 requests and 577.7 kB). First party is 103 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.

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://xelta.ai/api/geo has a header content-security-policy-report-only that is 805 characters long. https://xelta.ai/api/geo has a header report-to that is 609 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://xelta.ai/api...nt/public/pricing has 34 headers.https://xelta.ai/api/cms/maintenance has 34 headers.https://xelta.ai/api/geo has 33 headers.https://xelta.ai/api...nts/active-banner has 33 headers.https://xelta.ai/api...cms/announcements has 33 headers.

Avoid send too many response headers.

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 4 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 8% requests that are 3rd party (9 requests with a size of 577.2 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 2 tag-manager requests and uses 1 tag-manager tool. The page do 8 survelliance requests and uses 5 survelliance tools. The page do 8 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.

TitleWan 2.2 Professional (silent) - AI ModelThe document title, shown in the browser tab and used by search results.
Layout viewport1350 × 3349 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 elements1,787Very large, slows layout and styleTotal HTML elements. Fewer means less for the browser to style, lay out and paint.
Avg DOM depth11How deeply elements are nested on average.
Max DOM depth20The deepest nesting on the page. Deep branches cost more style recalculation.
Iframes1Embedded documents. Each is a separate page the browser loads and renders.
Script tags76Number 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

2 hints
dns-prefetch
  • https://media.xelta.ai/
preconnect
  • 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

6 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 Index1.70 show quickly the page looked done
First Visual Change0.77 sfirst paint reaches the screen
Last Visual Change4.44 sscreen stops changing · 3.66 s after first
≥95% rendered
≥99%
0.77 sFirst Visual Change
2.29 sVisual Complete 85% · Visual Complete 95%
2.72 sVisual Complete 99%
Last Visual Change4.44 s
Visual Readiness3.66 s· first to last change
01.0 s2.0 s3.0 s4.0 s
Content milestones
Perception index
Visual progress
Visual progress at 0 s0.0s
Visual progress at 1.2 s1.2s
Visual progress at 1.7 s1.7s
Visual progress at 2.3 s2.3s
Visual progress at 2.8 s2.8s
Visual progress at 3.4 s3.4s
Visual progress at 3.9 s3.9s
Visual progress at 4.5 s4.5s
FCP0.78s
LCP2.33s
VC852.29s
Long tasks
0.0s0.9s1.8s2.7s3.6s4.5s

Google Web Vitals

from run 1
553 msTTFB
Good
224 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.

2.328 sLCP render time

Phase breakdown

  • TTFB553 ms
  • Resource load delay1.805 s
  • Resource load duration87 ms
  • Element render delay-117 ms

Element

Element type
<video>
Size (w × h)
54600
URL
https://media.xelta....1762160650886.mp4
Load time
0 ms

DOM path

body > div#app-root > div > div:eq(1) > div > div > div:eq(0) > div:eq(1) > div > div > div:eq(0) > video
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.

0.000cumulative 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.

  • #10.000<div class="hidden lg:flex items-center flex-shrink-0 ml-auto"></div>
    body > div#app-root > header > div > 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 msMISS
cfEdge180 ms–
cfOrigin49 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 requests116
Total domains12
Transfer size1.9 MB
Content size5.6 MB
Missing compression1
Cookies41 third-party

Main document

status 200 · 1 redirect

https://xelta.ai/models/video-generation/wan-text-to-video-22-workflow

HeaderValue
alt-svch3=":443"; ma=86400
cf-cache-statusBYPASS
cf-raya3c9b7faffdc5109-DEL
dateThu, 17 Sep 2026 17:09:26 GMT
expect-ctmax-age=86400, enforce
location/models/video-generation/wan-text-to-video-22-workflow
nel{"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
referrer-policysame-origin strict-origin-when-cross-origin
refresh0;url=/models/video-generation/wan-text-to-video-22-workflow
report-to{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=pk%2B8IEQaYpkBcYCqFMUhAC00bGP2DTQSis8ATBf89tAoLKXY6Rw0TmO1Ofap4CbByLXfdv%2FqgdSo1BCqsGOtn1sPn86%2BjVJCAAplXYU2zC7wdfbjOul4nFBo"}]}
servercloudflare
server-timingcfCacheStatus;desc="BYPASS" cfEdge;dur=84,cfOrigin;dur=4
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
10893.1%
202
10.9%
204
43.4%
206
21.7%
308
10.9%

Largest assets on the page (by transfer size)

Top 20 of 116

Requests and sizes per content type

10 types

Transfer size1.9 MB

  • javascript69.9%
  • image12.8%
  • font9.2%
  • css4.8%
  • html1.5%
  • json0.84%
  • favicon0.50%
  • video0.31%
  • plain0.07%
  • other0.04%

Content size5.6 MB

  • javascript75.5%
  • css11.8%
  • image3.8%
  • html3.8%
  • font3.0%
  • video1.7%
  • json0.23%
  • favicon0.14%
  • other0.00%
  • plain0.00%

Requests115

  • javascript53.9%
  • image21.7%
  • json7.8%
  • font5.2%
  • plain5.2%
  • css1.7%
  • video1.7%
  • html0.87%
  • favicon0.87%
  • other0.87%
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b29.9 KB220.0 KB1
css0 b92.6 KB675.8 KB2
javascript0 b1.3 MB4.2 MB62
image0 b247.6 KB220.7 KB25
font0 b177.8 KB171.5 KB6
favicon0 b9.6 KB8.3 KB1
other0 b723 B151 B1
plain0 b1.4 KB2 B6
json0 b16.2 KB13.3 KB9
video0 b6.0 KB97.8 KB2
Total0 b1.9 MB5.6 MB115

Data per domain

12 domains
DomainTotal download timeTransfer SizeContent SizeRequests
xelta.ai9.377 s1.3 MB3.7 MB101
static.cloudflareinsights.com46 ms10.1 KB29.6 KB1
www.googletagmanager.com651 ms302.5 KB893.8 KB2
connect.facebook.net109 ms250.2 KB908.6 KB2
media.xelta.ai615 ms6.0 KB97.8 KB2
analytics.google.com126 msN/A0 b1
stats.g.doubleclick.net125 ms553 B0 b1
www.google.co.in245 ms408 B42 B1
mpc-prod-27-s6uit34pua-uk.a.run.app402 msN/A0 b1
us.i.posthog.com2.224 s286 B15 B1
telemetry.matchbestsoftware.online150 ms286 B2 B2
www.facebook.com64 msN/A0 b1

Expires & last-modified statistics

typeminmedianmax
Expires0 seconds1 year1 year
Last modified42 minutes18 hours40 weeks

Requests loaded after onLoad event

67 requests

Includes requests done after load event end.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript854.3 KB28
image132.1 KB16
font129.5 KB5
favicon9.6 KB1
plain1.4 KB6
json16.2 KB9
video6.0 KB2
Total1.1 MB67

Requests loaded after onContentLoad

67 requests

Includes requests done after DOM content loaded.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript854.3 KB28
image132.1 KB16
font129.5 KB5
favicon9.6 KB1
plain1.4 KB6
json16.2 KB9
video6.0 KB2
Total1.1 MB67

CPU

https://xelta.ai/_next/static/chunks/3-w1slqtx4wge.js is responsible for 41% of blocking time
91 ms of 221 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.

TBT224 ms
Max potential input delay103 ms
Total long tasks8
Total time639 ms
Last task at1.945 s
Before first paint65 ms1 task
Before FCP65 ms1 task
Before LCP639 ms8 tasks
After load574 ms7 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 time279.4 msacross all long frames — what hurts INP and TBT
Forced style & layout28.6 msscripts reading layout mid-frame
Blocking before LCP279.4 msdelaying the largest paint — fix these first
Blocking after load252.3 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
3-w1slqtx4wge.js4281.4 ms91.5 ms28.2 msevent handler, script tag
11234040900237293rd party1103.1 ms52.5 ms0.4 msscript tag
fbevents.js3rd party183.5 ms34.4 ms–script tag
js3rd party176 ms32.5 ms–script tag
1ki4hltmjvw2d.js152.9 ms5.2 ms–script tag
2k5vpzc_p9jpq.js128.3 ms2.8 ms–script tag
16orvb4qnjgm7.js121.2 ms2.1 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 · 106.4 msat 1.942 s · before LCP
blocking 53.8 ms
  • Scripts & other work105.7 ms
  • Animation callbacks0.1 ms
  • Style & layout0.6 ms
  • Render0 ms
1 script ran during this frame · forced style & layout 0.4 ms
Ran for
103.1 ms
Forced style and layout
0.4 ms
How it started
script tag
Long animation frame #2 · 103 msat 1.453 s · before LCP
input was waitingblocking 52.8 ms
  • Scripts & other work98.3 ms
  • Animation callbacks3.9 ms
  • Style & layout0.8 ms
  • Render0 ms
1 script ran during this frame · forced style & layout 28.2 ms
Ran for
98 ms
Forced style and layout
28.2 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 #3 · 98.5 msat 1.332 s · before LCP
blocking 40 ms
  • Scripts & other work94.6 ms
  • Animation callbacks1.5 ms
  • Style & layout2.4 ms
  • Render0 ms
2 scripts ran during this frame
Ran for
5.9 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)
Ran for
86 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 #4 · 95.6 msat 1.691 s · before LCP
blocking 36.5 ms
  • Scripts & other work85.4 ms
  • Animation callbacks0.2 ms
  • Style & layout10 ms
  • Render0 ms
1 script ran during this frame
js3rd party
Ran for
76 ms
How it started
script tag
Long animation frame #5 · 85.3 msat 1.597 s · before LCP
blocking 34.7 ms
  • Scripts & other work84.3 ms
  • Animation callbacks0.2 ms
  • Style & layout0.8 ms
  • Render0 ms
1 script ran during this frame
fbevents.js3rd party
Ran for
83.5 ms
How it started
script tag
Long animation frame #6 · 175 msat 571.7 ms · before LCP
blocking 27.1 ms
  • Scripts & other work113.2 ms
  • Animation callbacks0 ms
  • Style & layout61.8 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 #7 · 81.2 msat 1.074 s · before LCP
blocking 23.8 ms
  • Scripts & other work9 ms
  • Animation callbacks0 ms
  • Style & layout72.2 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 #8 · 116.2 msat 1.168 s · before LCP
blocking 10.7 ms
  • Scripts & other work108.3 ms
  • Animation callbacks0.2 ms
  • Style & layout7.7 ms
  • Render0 ms
3 scripts ran during this frame
Ran for
21.2 ms
How it started
script tag
Ran for
28.3 ms
How it started
script tag
Ran for
52.9 ms
How it started
script tag

2 more long frames carried no blocking time (nothing ran past the 50 ms threshold) — long, but harmless to INP and TBT.

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 requests17
Tools6
Categories6
Third-party cookies1

Categories

6 categories

Requests by category17

  • survelliance8 req · 5 tools47.1%
  • social3 req · 1 tool17.6%
  • utility2 req · 2 tools11.8%
  • tag-manager2 req · 1 tool11.8%
  • analytics1 req · 1 tool5.9%
  • ad1 req · 1 tool5.9%

Third party requests and tools

6 categories
utilityCloudflareOther Google APIs/SDKs2 requests · 2 tools
tag-managerGoogle Tag Manager2 requests · 1 tool
survellianceGoogle Tag ManagerFacebookGoogle Analytics+ 2 more8 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.

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

First party vs third party

103 first · 13 third party

Transfer size1.9 MB

  • First party1.3 MB70.8%
  • Third party564.2 KB29.2%

Content size5.6 MB

  • First party3.8 MB68.1%
  • Third party1.8 MB31.9%

Requests116

  • First party10388.8%
  • Third party1311.2%

First party requests and sizes per content type

103 requests

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

ContentHeader SizeTransfer SizeContent SizeRequests
html0 b29.9 KB220.0 KB1
css0 b92.6 KB675.8 KB2
javascript0 b789.5 KB2.4 MB57
image0 b247.2 KB220.7 KB24
font0 b177.8 KB171.5 KB6
favicon0 b9.6 KB8.3 KB1
other0 b723 B151 B1
plain0 b570 B0 b1
json0 b15.9 KB13.3 KB7
video0 b6.0 KB97.8 KB2
TotalN/A1.3 MB3.8 MB103

Third party requests and sizes per content type

13 requests
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b0 b0 b0
css0 b0 b0 b0
javascript0 b562.7 KB1.8 MB5
image0 b408 B42 B1
font0 b0 b0 b0
favicon0 b0 b0 b0
plain0 b839 B2 B5
json0 b286 B15 B2
TotalN/A564.2 KB1.8 MB13