Page summary

https://xelta.ai/models/video_generation/seedance-2-0-mini-video-generation

Tested 2026-08-24 06:53:34 using Chrome 150.0.7871.46 (runtime settings)

SummaryWaterfallMetricsRenderingCoachPageXrayCPUThird party

This page is visually stable, but slow to paint, a little janky to interact with, loose on best practices and weak on user privacy.

73 / 100
Coach overall
74 / 100
Performance
87 / 100
Best practice
66 / 100
Privacy

How it loaded →

0 → 9.453 s · median run
Frame at 0 ms
start
Frame at 3100 ms
3.100 s
Frame at 5000 ms
5.000 s
Frame at 6500 ms
6.500 s
Frame at 8000 ms
8.000 s
Frame at 9500 ms
Complete9.500 s
1.609 s
First Visual Change
6.653 s
Speed Index
9.117 s
Visual Complete 85%
9.453 s
Last Visual Change
TTFB577 msLCP9.372 sTBT258 msCLS0.04

What to act on · top recommendations

Have a fast first contentful paint

0 / 100

First contentful paint is poor (4.328 s). It is in the Google Web Vitals poor range, slower than 3 seconds.

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.

Have a fast largest contentful paint

0 / 100

Largest contentful paint is poor 9.372 s. It is in the Google Web Vitals poor range, slower than 4 seconds.

Google Web Vitals

min · median · mean · max of 1 run
MetricMinMedianMeanMax
Time To First Byte (TTFB)577 ms577 ms577 ms577 ms
Largest Contentful Paint (LCP)9.372 s9.372 s9.372 s9.372 s
Cumulative Layout Shift (CLS)0.04040.04040.04040.0404

Visual Metrics

min · median · mean · max of 1 run
MetricMinMedianMeanMax
First visual change1.609 s1.609 s1.609 s1.609 s
Last visual change9.453 s9.453 s9.453 s9.453 s
Speed index6.653 s6.653 s6.653 s6.653 s
Visual readiness7.844 s7.844 s7.844 s7.844 s
Visual complete 859.117 s9.117 s9.117 s9.117 s
Visual complete 959.453 s9.453 s9.453 s9.453 s
Visual complete 999.453 s9.453 s9.453 s9.453 s

CPU

min · median · mean · max of 1 run
MetricMinMedianMeanMax
Total Blocking Time258 ms258 ms258 ms258 ms
Max Potential FID141 ms141 ms141 ms141 ms
CPU long tasks 7777
CPU last long task happens at11.206 s11.206 s11.206 s11.206 s

More metrics

min · median · mean · max of 1 run
MetricMinMedianMeanMax
First paint2.088 s2.088 s2.088 s2.088 s
Load event end4.153 s4.153 s4.153 s4.153 s

Waterfall

Run 1 SpeedIndex median

First paintFCPLCPDOMContentLoadedDOM interactiveLoadRender-blockingRedirectError

Rendering

Run 1 · median
0.000 s
0s2s4s6s8s

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

76 frames

Use --filmstrip.showAll to show all filmstrips.

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Frame at 9.300 s
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Frame at 9.500 s
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Click a frame to seek the video to that moment. The dot marks frames where the page changed visually.

Why was rendering delayed?

First paint took 4.328 s. First paint landed at 4.328 s on a 577 ms first byte; the 2 render-blocking requests were done by 1.534 s and the remaining ~2.794 s is style and layout work. The largest paint followed at 9.372 s.

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

Render blocking requests

2 requests · 77.6 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 577 ms
913 ms
23.3 KB912 ms
css · xelta.ai
940 ms
76.6 KB940 ms
css · xelta.ai
935 ms
1023 B935 ms
LCP resource
1787417554386-kygh.jpeg — downloaded by 9.333 s, rendered at 9.372 s
555 ms
12.1 KB555 ms
web font · xelta.ai
948 ms
47.7 KB948 ms
02.343 s7.029 sFCP 4.328 sLCP 9.372 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

74
4 errors10 warnings3 info
error(0)Have a fast first contentful paintfirstContentfulPaint

First contentful paint is poor (4.328 s). It is in the Google Web Vitals poor range, slower than 3 seconds.

The First Contentful Paint (FCP) metric measures the time from when the page starts loading to when any part of the page content is rendered on the screen. For this metric, "content" refers to text, images (including background images), <svg> elements, or non-white <canvas> elements.

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.

error(0)Have a fast largest contentful paintlargestContentfulPaint

Largest contentful paint is poor 9.372 s. It is in the Google Web Vitals poor range, slower than 4 seconds.

Largest contentful paint is one of Google Web Vitals and reports the render time of the largest image or text block visible within the viewport, relative to when the page first started loading. To be fast according to Google, it needs to render before 2.5 seconds and results over 4 seconds is poor performance.

Offenders
warn(0)Avoid CPU Long TaskslongTasks

The page has 7 CPU long tasks with the total of 670 ms. The total blocking time is 258 ms and 1 long task before first contentful paint with total time of 112 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
  • unknown
warn(0)Total JavaScript size shouldn't be too bigjavascriptSize

The total JavaScript transfer size is 772 kB and the uncompressed size is 2.5 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://www.googletagmanager.com/gtag/js?id=G-CPG3NLBKHP182.9 KB551.6 KB
https://xelta.ai/_next/static/chunks/0m3mx3i-m~688.js4.8 KB15.1 KB
https://xelta.ai/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js4.4 KB12.0 KB
https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e178179150949611.3 KB30.9 KB
https://xelta.ai/_next/static/chunks/04~e..1ztbtpk.js12.9 KB39.7 KB
https://xelta.ai/_next/static/chunks/00u_2hudh-34~.js14.9 KB48.7 KB
https://xelta.ai/_next/static/chunks/08nzb153.fs1t.js56.4 KB240.5 KB
https://xelta.ai/_next/static/chunks/08awojht0q7q1.js9.5 KB28.2 KB
https://xelta.ai/_next/static/chunks/0sj3aqfg9c~8k.js7.7 KB30.7 KB
https://xelta.ai/_next/static/chunks/13bz.~e9vkkbi.js9.8 KB32.4 KB
https://xelta.ai/_next/static/chunks/018e-dq7n7_9a.js1.9 KB2.7 KB
https://xelta.ai/_next/static/chunks/17b3z_92n-ida.js29.4 KB90.4 KB
https://xelta.ai/_next/static/chunks/0rogcuclal8nq.js12.4 KB34.8 KB
https://xelta.ai/_next/static/chunks/0h~ghfwq3l0n1.js16.1 KB52.7 KB
https://xelta.ai/_next/static/chunks/0968~ir0sl3wz.js7.5 KB19.9 KB
https://xelta.ai/_next/static/chunks/06e425a78ll4h.js19.4 KB62.0 KB
https://xelta.ai/_next/static/chunks/0x_ej7ci_dxr3.js17.0 KB67.5 KB
https://xelta.ai/_next/static/chunks/0kc5itym_8jof.js15.8 KB63.5 KB
https://xelta.ai/_next/static/chunks/02fvhu.~ed9tm.js43.6 KB140.7 KB
https://xelta.ai/_next/static/chunks/0fg44qzichqiw.js42.0 KB142.6 KB
https://xelta.ai/_next/static/chunks/0f-bld2ezby-x.js14.5 KB42.0 KB
https://xelta.ai/_next/static/chunks/0fb..7m5fmuc_.js10.0 KB27.9 KB
https://xelta.ai/_next/static/chunks/0.4x.j3tu010_.js7.8 KB21.3 KB
https://xelta.ai/_next/static/chunks/150ht8n--uthk.js9.2 KB31.3 KB
https://xelta.ai/_next/static/chunks/01tugzyomgiq~.js12.1 KB32.6 KB
https://xelta.ai/_next/static/chunks/13ee4mpgt8ag..js9.9 KB25.7 KB
https://xelta.ai/_next/static/chunks/144c003qaudkf.js10.7 KB37.2 KB
https://xelta.ai/_next/static/chunks/050ulb5j.jx1j.js10.2 KB27.3 KB
https://xelta.ai/_next/static/chunks/024fj8o14tb3b.js7.3 KB30.6 KB
https://xelta.ai/_next/static/chunks/turbopack-03fenzcryei4t.js6.6 KB19.5 KB
https://xelta.ai/_next/static/chunks/15_v~jewnj0mv.js10.2 KB45.5 KB
https://xelta.ai/_next/static/chunks/0y0ijhqmszjlv.js70.7 KB225.2 KB
https://xelta.ai/_next/static/chunks/0vh93s1co9ess.js41.7 KB148.7 KB
https://xelta.ai/_next/static/chunks/175jm~.6d92n1.js13.6 KB41.9 KB
warn(30)Avoid extra requests by setting cache headerscacheHeaders

The page has 7 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 12.9 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(50)Total CSS size shouldn't be too bigcssSize

The total CSS transfer size is 79.5 kB and uncompressed size is 600.4 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/145xyk44994b_.css76.6 KB584.4 KB
https://xelta.ai/_next/static/chunks/08ak-dq81l91~.css1023 B2.0 KB
warn(60)Don't scale images in the browseravoidScalingImages

The page has 4 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(67)Serve images in modern formats (AVIF, WebP)modernImageFormats

The page ships 1 image (out of 3) 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(83)Lazy-load below-the-fold imageslazyLoadingImages

The page has 1 below-the-fold image without loading="lazy". Add loading="lazy" so the browser defers downloading and decoding them until the user scrolls them into view.

Adding loading="lazy" to an <img> tells the browser not to download or decode it until it is close to the viewport. For images that the user may never see (deep in the page, behind a tab, in a footer carousel), this saves bandwidth and main-thread time during initial render. The LCP image and any image in the initial viewport should NOT be lazy-loaded — that delays the first paint. https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#loading

Offenders
infoLong cache headers is goodcacheHeadersLong

The page has 12 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
infoMake each CSS response smalloptimalCssSize

https://xelta.ai/_next/static/chunks/145xyk44994b_.css size is 78.5 kB (78455) 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/145xyk44994b_.css76.6 KB584.4 KB
warn(90)Don't use private headers on static contentprivateAssets

The page has 2 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
error(90)Avoid missing and error requestsresponseOk

The page has 1 error response. The page has 1 response with code 401.

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
infoAdd decoding="async" to non-critical imagesdecodingAsync

The page has 3 images (out of 37) 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(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

87
1 warning2 info
infoAvoid unnecessary headersunnecessaryHeaders

There are 1 response that sets both a max-age and expires header. There are 1 response that sets a pragma no-cache header (that is a request header). There are 54 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
infoMeta descriptionmetaDescription

The meta description is too long. It has 173 characters, the recommended max is 160

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

warn(50)Avoid too many third party requeststhirdParty

The page do 14% requests to third party domains (8 requests and 206 kB). First party is 51 requests and 1.2 MB. The regex .*xelta.* was used to calculate first/third party requests.

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

Privacy advice

66
6 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 3 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 14% requests that are 3rd party (8 requests with a size of 206 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 1 tag-manager request and uses 1 tag-manager tool. The page do 2 survelliance requests and uses 2 survelliance tools. The page do 2 surveillance requests and uses 2 surveillance tools. The page do 1 utility request and uses 1 utility tool. The page do 1 analytics request and uses 1 analytics 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

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.

TitleSeedance 2.0 Mini - AI ModelThe document title, shown in the browser tab and used by search results.
Layout viewport1395 × 2925 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 elements1,349Large, watch layout costTotal 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 depth25Deep treeThe deepest nesting on the page. Deep branches cost more style recalculation.
Iframes0No embedded documents on this page.
Script tags75Number 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 storage298 BData the page saved in localStorage, kept across visits.
Session storage0 bData kept in sessionStorage for this tab session only.
Connection type3GWhat 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

3 technologies

Third-party tools

8 tools

Data collected using Third Party Web version 0.29.2.

Tag-manager
  • Google Tag Manager
Survelliance
  • Google Tag Manager
  • Google Analytics
Surveillance
  • Google Tag Manager
  • Google Analytics
Utility
  • Cloudflare
Other
  • Amazon Web Services
Analytics
  • Google Analytics

Data from run 1

Visual Metrics

Visual milestones

all times from navigation start
Speed Index6.65 show quickly the page looked done
First Visual Change1.61 sfirst paint reaches the screen
Last Visual Change9.45 sscreen stops changing · 7.84 s after first
1.61 sFirst Visual Change
Visual Complete 85%9.12 s
Visual Complete 95% · Visual Complete 99% · Last Visual Change9.45 s
Visual Readiness7.84 s· first to last change
02.0 s4.0 s6.0 s8.0 s
Content milestones
Perception index
Visual progress
Visual progress at 0 s0.0s
Visual progress at 2.7 s2.7s
Visual progress at 3.7 s3.7s
Visual progress at 5.2 s5.2s
Visual progress at 6.3 s6.3s
Visual progress at 7.4 s7.4s
Visual progress at 8.4 s8.4s
Visual progress at 9.5 s9.5s
FCP4.33s
LCP9.37s
VC859.12s
Long tasks
0.0s1.9s3.8s5.7s7.6s9.5s

Google Web Vitals

from run 1
577 msTTFB
Good
258 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.

9.372 sLCP render time

Phase breakdown

  • TTFB577 ms
  • Resource load delay8.207 s
  • Resource load duration558 ms
  • Element render delay30 ms

Element

Element type
<div>
Size (w × h)
70632
URL
https://media.xelta....7554386-kygh.jpeg
Load time
9.343 s

DOM path

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

0.040cumulative 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.

  • #10.009
  • #20.004
  • #30.004
  • #40.004
  • #50.004
  • #60.003
  • #70.003
  • #80.003
  • #90.002
  • #100.002
  • #110.002
  • #120.000<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
TTFB577 ms
Fully loaded12.655 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 msHIT
cfEdge279 ms–
cfOrigin0 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 requests59
Total domains8
Transfer size1.4 MB
Content size4.0 MB
Missing compression0

Main document

status 200 · 0 redirects

https://xelta.ai/models/video_generation/seedance-2-0-mini-video-generation

HeaderValue
alt-svch3=":443"; ma=86400
cache-controlprivate, max-age=604800, must-revalidate
cf-cache-statusHIT
cf-raya30070dd4e5da7df-DEL
content-encodingbr
content-typetext/html; charset=utf-8
dateMon, 24 Aug 2026 06:53:36 GMT
expect-ctmax-age=86400, enforce
last-modifiedMon, 24 Aug 2026 06:53:36 GMT
link</_next/static/media/83afe278b6a6bb3c-s.p.0q-301v4kxxnr.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2"
nel{"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
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=HFbu5gyER%2BmqDTfTHzIHJylXebqW4FwhbwUSNZCvli7yblpowxC%2BaWBJ7B4OKo0ixkTyb%2FbXk7hlqwMqo20O8GiWkuMXtml8mMELnp3Fniy4mA66N%2B60%2B0c3"}]}
servercloudflare
server-timingcfCacheStatus;desc="HIT" cfEdge;dur=279,cfOrigin;dur=0
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
5491.5%
204
46.8%
401
11.7%

Requests and sizes per content type

9 types

Transfer size1.4 MB

  • javascript54.0%
  • image34.7%
  • css5.6%
  • font3.4%
  • html1.7%
  • json0.55%
  • plain0.04%
  • other0.03%

Content size4.0 MB

  • javascript60.9%
  • css14.5%
  • image11.8%
  • favicon7.2%
  • html4.2%
  • font1.2%
  • json0.30%
  • other0.00%

Requests58

  • javascript58.6%
  • image15.5%
  • json8.6%
  • other5.2%
  • css3.4%
  • plain3.4%
  • html1.7%
  • font1.7%
  • favicon1.7%
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b23.3 KB168.8 KB1
css0 b77.6 KB586.3 KB2
javascript0 b753.9 KB2.4 MB34
image0 b485.1 KB478.6 KB9
font0 b47.7 KB47.3 KB1
favicon0 b0 b290.5 KB1
other0 b447 B151 B3
plain0 b573 B0 b2
json0 b7.7 KB12.0 KB5
Total0 b1.4 MB4.0 MB58

Data per domain

8 domains
DomainTotal download timeTransfer SizeContent SizeRequests
xelta.ai168.937 s888.1 KB3.1 MB46
www.googletagmanager.com1.248 s182.9 KB551.6 KB1
static.cloudflareinsights.com6.095 s11.3 KB30.9 KB1
vygxif9kfe.execute-api.ap-south-1.amazonaws.com5.445 s6.9 KB10.7 KB5
analytics.google.com2.668 sN/A0 b1
pmt.xelta.ai2.688 s874 B1.3 KB2
cms-b.xelta.ai3.297 s800 B26 B1
media.xelta.ai3.019 s306.3 KB304.8 KB2

Expires & last-modified statistics

typeminmedianmax
Expires0 seconds1 year1 year
Last modified0 seconds1 day7 weeks

Requests loaded after onLoad event

19 requests

Includes requests done after load event end.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript0 b0
image483.6 KB8
font0 b0
favicon0 b1
plain573 B2
other0 b2
json7.7 KB5
Total492.7 KB19

Requests loaded after onContentLoad

19 requests

Includes requests done after DOM content loaded.

ContentTransfer SizeRequests
html0 b0
css0 b0
javascript0 b0
image483.6 KB8
font0 b0
favicon0 b1
plain573 B2
other0 b2
json7.7 KB5
Total492.7 KB19

CPU

https://xelta.ai/_next/static/chunks/0y0ijhqmszjlv.js is responsible for 90% of blocking time
259 ms of 288 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.

TBT258 ms
Max potential input delay141 ms
Total long tasks7
Total time670 ms
Last task at11.206 s
Before first paint0 ms0 tasks
Before FCP112 ms1 task
Before LCP288 ms3 tasks
After load670 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 frames9every frame ≥ 50 ms
Blocking time416.3 msacross all long frames — what hurts INP and TBT
Forced style & layout25.9 msscripts reading layout mid-frame
Blocking before LCP147.5 msdelaying the largest paint — fix these first
Blocking after load347.3 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
0y0ijhqmszjlv.js6339.4 ms259.1 ms25.9 msevent handler
TimerHandler:setTimeout1111.7 ms58.4 ms–timer or animation callback
js3rd party2107 ms12.7 ms–script tag, timer or animation callback
rocket-loader.min.js18.8 ms8.8 ms–event handler
v4513226cdae34746b4dedf0b4dfa099e17817915094963rd party17.3 ms7.3 ms–module script

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 · 205.9 msat 11.064 s · after load
blocking 155.2 ms
  • Scripts & other work142.1 ms
  • Animation callbacks1.2 ms
  • Style & layout62.6 ms
  • Render0 ms
1 script ran during this frame
Ran for
141.2 ms
Started by
MessagePort.onmessage
How it started
event handler
Source function
z
Position in source
character 7855 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Long animation frame #2 · 127.2 msat 10.361 s · after load
blocking 76.1 ms
  • Scripts & other work92.2 ms
  • Animation callbacks1.1 ms
  • Style & layout33.9 ms
  • Render0 ms
1 script ran during this frame
Ran for
91 ms
Started by
MessagePort.onmessage
How it started
event handler
Source function
z
Position in source
character 7855 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Long animation frame #3 · 119.1 msat 4.136 s · before LCP
blocking 69 ms
  • Scripts & other work18.4 ms
  • Animation callbacks1.1 ms
  • Style & layout99.6 ms
  • Render0 ms
2 scripts ran during this frame
Ran for
7.3 ms
How it started
module script
Ran for
8.8 ms
Started by
DOMWindow.onload
How it started
event handler
Position in source
character 8077 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Long animation frame #4 · 120.6 msat 8.332 s · before LCP
blocking 62.6 ms
  • Scripts & other work119.7 ms
  • Animation callbacks0.7 ms
  • Style & layout0.2 ms
  • Render0 ms
2 scripts ran during this frame
TimerHandler:setTimeout
Ran for
111.7 ms
Started by
TimerHandler:setTimeout
How it started
timer or animation callback
Ran for
5.6 ms
Started by
MessagePort.onmessage
How it started
event handler
Source function
z
Position in source
character 7855 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Long animation frame #5 · 88.5 msat 10.948 s · after load
blocking 37.5 ms
  • Scripts & other work82.5 ms
  • Animation callbacks5.9 ms
  • Style & layout0.1 ms
  • Render0 ms
1 script ran during this frame · forced style & layout 25.9 ms
Ran for
81.3 ms
Forced style and layout
25.9 ms
Started by
MessagePort.onmessage
How it started
event handler
Source function
z
Position in source
character 7855 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Long animation frame #6 · 81.6 msat 8.501 s · before LCP
blocking 15.9 ms
  • Scripts & other work80.9 ms
  • Animation callbacks0.2 ms
  • Style & layout0.5 ms
  • Render0 ms
3 scripts ran during this frame
Ran for
5.3 ms
Started by
MessagePort.onmessage
How it started
event handler
Source function
z
Position in source
character 7855 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
Ran for
9.3 ms
Started by
MessagePort.onmessage
How it started
event handler
Source function
z
Position in source
character 7855 into the file (locate it via DevTools → Performance → the Long Animation Frames track)
js3rd party
Ran for
64.8 ms
How it started
script tag

3 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 1 script

Third party

Third party requests categorised by Third party web version 0.29.2.

Third-party requests10
Tools4
Categories5

Categories

5 categories

Requests by category10

  • other5 req · 1 tool50.0%
  • survelliance2 req · 2 tools20.0%
  • tag-manager1 req · 1 tool10.0%
  • utility1 req · 1 tool10.0%
  • analytics1 req · 1 tool10.0%

First party vs third party

51 first · 8 third party

Transfer size1.4 MB

  • First party1.2 MB85.6%
  • Third party201.2 KB14.4%

Content size4.0 MB

  • First party3.4 MB85.3%
  • Third party593.2 KB14.7%

Requests59

  • First party5186.4%
  • Third party813.6%

First party requests and sizes per content type

51 requests

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

ContentHeader SizeTransfer SizeContent SizeRequests
html0 b23.3 KB168.8 KB1
css0 b77.6 KB586.3 KB2
javascript0 b559.6 KB1.8 MB32
image0 b485.1 KB478.6 KB9
font0 b47.7 KB47.3 KB1
favicon0 b0 b290.5 KB1
other0 b447 B151 B2
plain0 b573 B0 b1
json0 b1.6 KB1.3 KB2
TotalN/A1.2 MB3.4 MB51

Third party requests and sizes per content type

8 requests
ContentHeader SizeTransfer SizeContent SizeRequests
html0 b0 b0 b0
css0 b0 b0 b0
javascript0 b194.2 KB582.5 KB2
image0 b0 b0 b0
font0 b0 b0 b0
favicon0 b0 b0 b0
other0 b0 b0 b1
plain0 b0 b0 b1
json0 b6.1 KB10.6 KB3
TotalN/A201.2 KB593.2 KB8