https://www.proantic.com/antiquaires.php
Tested 2026-09-25 01:34:36 using Chrome 151.0.7922.75 (runtime settings)
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 videoUse --filmstrip.showAll to show all filmstrips.
Click a frame to seek the video to that moment. The dot marks frames where the page changed visually.
How smoothly Chrome delivered frames to the screen during the test. Dropped counts only frames Chrome flags as affecting smoothness. On mostly-static pages the longest gap includes idle time where there was simply nothing to draw.
Rendering was not meaningfully delayed. First paint landed at 640 ms on a 205 ms first byte; the 6 render-blocking requests were done by 471 ms and the remaining ~169 ms is style and layout work (36 ms of it measured style recalculation).
Style the browser had to recalculate before it could paint: many elements or a lot of time spent here points at expensive CSS on the critical rendering path. The recalculation count and the largest single one tell the two problems apart: one massive style change touching most of the page (few recalculations, the largest close to the total) needs different medicine than thousands of tiny ones (many recalculations, each tiny).
One large recalculation dominates. Restyling 882 elements cost 36 ms before the page painted (5.7 % of the time to First Contentful Paint), and a single recalculation of 882 elements accounts for 36 ms of it. Look for one class or inline-style change on a large container near the top of the DOM that restyles the whole subtree at once. The changes driving it are listed under Style invalidations below.
The recalculation work before first paint is 5.7 % of the time to First Contentful Paint.
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 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.
| Request | When it loaded | Transfer | Download |
|---|---|---|---|
document | 469 ms | 115.5 KB | 468 ms |
251 ms | 40.5 KB | 251 ms | |
45 ms | 19.0 KB | 45 ms | |
37 ms | 8.9 KB | 37 ms | |
29 ms | 879 B | 29 ms | |
28 ms | 662 B | 28 ms | |
18 ms | 1.9 KB | 18 ms | |
jquery-ui.min.jsblocks parser in body | 1.263 s · past FCP | 56.5 KB | 1.263 s |
sweetalert2.jsblocks parser in body | 205 ms | 15.0 KB | 205 ms |
| 3 more requests | all done by 2.440 s | 195.4 KB | |
1.715 s · past FCP | 378.5 KB | 1.715 s | |
1.166 s · past FCP | 107.5 KB | 1.166 s | |
79 ms · past FCP | 19.2 KB | 79 ms | |
0160 ms320 msFCP · LCP 640 ms |
Why the browser had to recalculate style and layout: every DOM/style change invalidates some set of nodes, and the same class or attribute churning over and over is the pattern to hunt. Counts, not milliseconds: the time is in the style recalculation numbers above.
Chase what keeps changing after the page is up. 54 style recalculations and 1 603 layout invalidations fired after first paint, on a page the user was already looking at. The biggest driver is pseudo disabled (4×). Start with the script under "Scripts causing invalidations" that keeps triggering it.
pseudo: disabled4×pseudo: enabled4×attribute: class3×attribute: disabled1×class: ui-menu1×class: ui-widget1×class: ui-widget-content1×class: ui-autocomplete1×class: ui-front1×class: ui-helper-hidden-accessible1×Invalidations on a page the user was already looking at, the actionable half.
| Reason | Style recalculations | Layout |
|---|---|---|
| A node was inserted into the page | 40 | – |
| Related style rule | 12 | – |
| A stylesheet rule changed | 1 | – |
| JavaScript changed an inline styleSet a class instead of writing element.style, so the browser can batch the work. | 1 | – |
| A web font finished loadingPreload the font or use font-display so a late swap does not re-style the page. | – | 1 595 |
| An element entered layout | – | 2 |
| An element's size changed | – | 5 |
| An element left layout | – | 1 |
The page being constructed and styled for the first render. Expected work, shown for scale.
| Reason | Style recalculations | Layout |
|---|---|---|
| A node was inserted into the page | 12 | – |
| Related style rule | 3 | – |
| A stylesheet rule changed | 1 | – |
| An element entered layout | – | 1 199 |
| An element left layout | – | 3 |
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.
decodingAsyncThe page has 52 images (out of 52) 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
googleTagManagerThe 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.
modernImageFormatsThe page ships 52 images (out of 52) 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
fewFontsThe page has 10 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.
javascriptSizeThe total JavaScript transfer size is 307.5 kB and the uncompressed size is 920.1 kB. This is quite large.
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?
| URL | Transfer | Content |
|---|---|---|
| https://analytics.proantic.com/api/script.js | 33.5 KB | 33.2 KB |
| https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js | 30.9 KB | 87.4 KB |
| https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js | 56.5 KB | 247.7 KB |
| https://www.googletagmanager.com/gtag/js?id=G-YP51KSLLWR | 162.5 KB | 478.7 KB |
| https://www.proantic.com/js/sweetalert2.js | 15.0 KB | 47.2 KB |
| https://cdn.jsdelivr.net/npm/promise-polyfill@8/dist/polyfill.min.js | 1.9 KB | 4.3 KB |
avoidScalingImagesThe page has 5 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.
imageSizeThe page total image size is 1.2 MB. It's really big. Is the page using the right format for the images? Can they be lazy loaded? Are they compressed as good as they can be? Make them smaller by using https://imageoptim.com/.
Avoid having too many large images on the page. The images will not affect the first paint of the page, but it will eat bandwidth for the user.
avoidRenderBlockingThe page has 6 blocking requests and 4 in body parser blocking (4 JavaScript and 6 CSS). There are 1 potentially render blocking requests. You need to verify if it is render blocking: https://www.googletagmanager.com/gtag/js?id=G-YP51KSLLWR
The critical rendering path is what the browser needs to do to start rendering the page. Every file requested inside of the head element will postpone the rendering of the page, because the browser need to do the request. Avoid loading JavaScript synchronously inside of the head (you should not need JavaScript to render the page), request files from the same domain as the main document (to avoid DNS lookups) and inline CSS for really fast rendering and a short rendering path.
longTasksThe page has 2 CPU long tasks with the total of 166 ms. The total blocking time is 15 ms and 1 long task before first contentful paint with total time of 101 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.
cacheHeadersLongThe page has 26 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.
lazyLoadingImagesThe page has 6 below-the-fold images 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
cacheHeadersThe page has 1 request that are missing a cache time. Configure a cache time so the browser doesn't need to download them every time. It will save 479 B 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.
compressAssetsThe 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.
| URL | Transfer | Content |
|---|---|---|
| https://analytics.proantic.com/api/script.js | 33.5 KB | 33.2 KB |
optimalCssSizehttps://www.proantic.com/css/A.sweetalert2-v1-2.css,,q202609211223+carrousel-09.css,,q202609211223+fontawesome.min.css,,q202609211223,Mcc.-ud7uC62EX.css.pagespeed.cf.cMgkAqLh5l.css size is 41.5 kB (41503) 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.
| URL | Transfer | Content |
|---|---|---|
| https://www.proantic.com/css/A.sweetalert2-v1-2.css,,q202609211223+carrousel-09....cf.cMgkAqLh5l.css | 40.5 KB | 166.5 KB |
privateAssetsThe page has 1 request 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.
unnecessaryHeadersThere are 34 responses that sets both a max-age and expires header. There are 40 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.
longHeadershttps://www.proantic.com/antiquaires.php has a header content-security-policy that is 2256 characters long.
Do not send response headers that are too long.
referrerPolicyNo <meta name="referrer"> tag was found on the page. Set a Referrer-Policy response header (preferred) or add a meta tag, for example <meta name="referrer" content="strict-origin-when-cross-origin">.
Without an explicit referrer policy the browser falls back to the user-agent default and may leak the full URL of the previous page (including query strings) to every cross-origin request. Set a Referrer-Policy response header (preferred) or a <meta name="referrer"> tag in the document. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
surveillanceThe page embeds 1 resource 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.
crossOriginEmbedderPolicyHeaderSet 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
crossOriginOpenerPolicyHeaderSet 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
crossOriginResourcePolicyHeaderSet 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
nelHeaderSet a NEL header (paired with Reporting-Endpoints) to collect connection-level error reports from the field.
The NEL (Network Error Logging) response header tells the browser to record connection-level failures (DNS, TLS, HTTP errors) and ship them to a reporting endpoint. NEL pairs with the Reporting-Endpoints / Report-To header — the page declares the endpoint group and NEL points at it. Together they give you visibility into errors that never reach your origin server. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/NEL
referrerPolicyHeaderSet a referrer-policy header to make sure you do not leak user information.
Referrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites. https://scotthelme.co.uk/a-new-security-header-referrer-policy/.
reportingEndpointsHeaderSet a Reporting-Endpoints header (or the legacy Report-To header) so CSP reports, NEL data and other Reporting-API events have an endpoint to land at.
The Reporting-Endpoints response header (the successor to Report-To) names the URLs that browsers should POST reports to. Without it, CSP report-to directives, Cross-Origin-Opener-Policy reports, NEL data and other Reporting-API events have nowhere to go. The legacy Report-To header is still accepted for older Chromium versions. https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Reporting-Endpoints
thirdPartyPrivacyThe page has 10% requests that are 3rd party (4 requests with a size of 257.9 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 survelliance requests and uses 2 survelliance tools. The page do 2 surveillance requests and uses 2 surveillance tools. The page do 1 tag-manager request and uses 1 tag-manager 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.
contentSecurityPolicyHeaderThe policy allows 'unsafe-inline', which lets the browser execute inline scripts and styles directly from the page. Move to nonces or hashes plus 'strict-dynamic' so that inline injection cannot run. The policy allows 'unsafe-eval', which lets the page call eval() and Function(). Almost no application needs this; remove it.
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
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.
Document
What the page says it is and how large it rendered.
DOM structure
How much markup the browser has to build, style and lay out.
What the page stored on the client, and the network it was tested on.
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.
Data collected using Third Party Web version 0.29.2.
0.0s0.7s1.0s1.2s1.7s1.9s2.2s2.4sWhen the page main content is rendered, collected via the Largest Contentful Paint API. Read more about Largest Contentful Paint.
body > main#section-nouveautes > div#section-nouveautes > section#minheight > div:eq(0) > h1
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.
How much the page's content shifts as it loads, collected via the Cumulative Layout Shift API.
One shift is 82% of your 0.002 CLS. #text moved at 724 ms. Reserve space for whatever renders into that spot, a fixed height or an aspect-ratio box, so later content stops pushing the page around.
Worst first, showing shifts of 0.01 and up. Each percentage is that shift's exact share of the score.
The shift is spread across many movements below 0.01, none large enough to single out. Check the video or filmstrip to see what moved.
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.
There are no custom configured scripts.
There are no custom extra metrics from scripting.
How the page is built.
https://www.proantic.com/antiquaires.php
| Header | Value |
|---|---|
cache-control | max-age=0, no-cache, s-maxage=10 |
content-encoding | gzip |
content-security-policy | upgrade-insecure-requests;font-src 'self' data:; img-src 'self' https://assets.pinterest.com/ https://www.googletagmanager.com https://*.googletagmanager.com/ https://*.google-analytics.com/ https://googleads.g.doubleclick.net https://stats.g.doubleclick.net data: blob:; frame-src 'self' https://www.youtube.com https://bid.g.doubleclick.net https://www.google.com/recaptcha/ https://recaptcha.google.com/recaptcha/; child-src 'self' https://www.google.com/recaptcha/ https://recaptcha.google.com/recaptcha/ ;connect-src 'self' https://analytics.proantic.com/ https://storage.googleapis.com/monocle-spdj-production.appspot.com/ wss://gallery-rc.monocle3d.com wss://gallery.monocle3d.com https://gallery-rc.monocle3d.com/ https://components-rc.monocle3d.com/ https://gallery.monocle3d.com/ https://components.monocle3d.com/ https://www.google.com/recaptcha/api2/ https://firebasestorage.googleapis.com https://firestore.googleapis.com https://*.analytics.google.com https://*.googletagmanager.com https://*.google-analytics.com/ https://www.google-analytics.com/j/ www.google-analytics.com *.google-analytics.com https://stats.g.doubleclick.ne blob:; form-action 'self' https://www.sandbox.paypal.com/ https://www.paypal.com/ https://proantic.us8.list-manage.com/subscribe/post; object-src 'none'; worker-src 'self' blob:; base-uri 'self'; frame-ancestors 'self';script-src 'unsafe-eval' 'unsafe-inline' 'self' https://analytics.proantic.com/api/script.js https://components.monocle3d.com/ https://components-rc.monocle3d.com/ https://www.googletagmanager.com/ https://monocle.link https://monocle.link/ https://ajax.googleapis.com/ajax/libs/model-viewer/3.5.0/model-viewer.min.js https://cse.google.com/cse/ https://www.google.com/cse/ https://tagmanager.google.com https://transloadit.edgly.net/releases/ https://code.jquery.com/jquery-3.2.1.min.js https://cdn.jsdelivr.net/npm/ https://apis.google.com/ajax/libs/ https://www.google.com/recaptcha/api.js https://ajax.googleapis.com/ajax/libs/webfont/ https://apis.google.com/js/ https://ajax.googleapis.com/ajax/libs/jquery/ https://ajax.googleapis.com/ajax/libs/jqueryui/ https://www.gstatic.com/recaptcha/ https://cdnjs.cloudflare.com/ajax/libs/jquery/ https://cdnjs.cloudflare.com/ajax/libs/jqueryui/; |
content-type | text/html; charset=utf-8 |
date | Fri, 25 Sep 2026 01:34:37 GMT |
permissions-policy | geolocation=(self), microphone=() |
server | nginx |
strict-transport-security | max-age=63072000; includeSubDomains; preload |
vary | Accept-Encoding |
x-content-type-options | nosniff |
x-frame-options | SAMEORIGIN |
x-mod-pagespeed | 1.13.35.2-0 |
Transfer size2.3 MB
Content size4.2 MB
Requests41
| Content | Header Size | Transfer Size | Content Size | Requests |
|---|---|---|---|---|
| html | 0 b | 115.5 KB | 1.2 MB | 1 |
| css | 0 b | 76.7 KB | 350.7 KB | 7 |
| javascript | 0 b | 300.3 KB | 898.5 KB | 6 |
| image | 0 b | 1.2 MB | 1.2 MB | 14 |
| font | 0 b | 639.0 KB | 635.3 KB | 10 |
| json | 0 b | 701 B | 287 B | 2 |
| other | 0 b | 0 b | 0 b | 1 |
| Total | 0 b | 2.3 MB | 4.2 MB | 41 |
| Domain | Total download time | Transfer Size | Content Size | Requests |
|---|---|---|---|---|
| www.proantic.com | 16.225 s | 2.0 MB | 3.4 MB | 33 |
| analytics.proantic.com | 199 ms | 34.2 KB | 33.5 KB | 4 |
| ajax.googleapis.com | 208 ms | 30.9 KB | 87.4 KB | 1 |
| cdnjs.cloudflare.com | 1.273 s | 56.5 KB | 247.7 KB | 1 |
| www.googletagmanager.com | 2.175 s | 162.5 KB | 478.7 KB | 1 |
| cdn.jsdelivr.net | 205 ms | 1.9 KB | 4.3 KB | 1 |
| type | min | median | max |
|---|---|---|---|
| Expires | 0 seconds | 4 weeks | 1 year |
| Last modified | 4 days | 13 weeks | 17 years |
Includes requests done after load event end.
| Content | Transfer Size | Requests |
|---|---|---|
| html | 0 b | 0 |
| css | 0 b | 0 |
| javascript | 0 b | 0 |
| image | 3.3 KB | 1 |
| font | 0 b | 0 |
| favicon | 0 b | 0 |
| Total | 3.3 KB | 1 |
Includes requests done after DOM content loaded.
| Content | Transfer Size | Requests |
|---|---|---|
| html | 0 b | 0 |
| css | 0 b | 0 |
| javascript | 0 b | 0 |
| image | 3.3 KB | 1 |
| font | 0 b | 0 |
| favicon | 0 b | 0 |
| other | 0 b | 1 |
| json | 222 B | 1 |
| Total | 3.5 KB | 3 |
Tasks ≥ 50 ms blocking the main thread, collected via the Long Task API.
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.
| Script | Frames | Time running | Blocking (share by run time) | Forced style & layout | Triggered by |
|---|---|---|---|---|---|
| js | 1 | 65.4 ms | 15.5 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.
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.
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.
Total Blocking Time attributed per script from the Chrome trace: every main-thread task longer than 50 ms blocks input for the remainder, and each blocking task is credited to the script whose own code ran the longest during that task.
All main-thread work during the full page load, not just the share that blocked input. Calculated from the Chrome trace.
parseHTMLstyleLayoutscriptParseCompilescriptEvaluationpaintCompositeRendergarbageCollectionotherHow much setTimeout/setInterval work the page runs, credited to the script that scheduled each timer. Many zero-delay timers mean work sliced into a machine-gun of tiny tasks; repeating timers are polling.
| Set by | Delay | Type | Times set | Times fired | Fire time |
|---|---|---|---|---|---|
kd in https://www.googletagmanager.com/gtag/js?id=G-YP51KSLLWR:256 | 0 ms | once | 22 | 22 | 23.3 ms |
| https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js:2 | 0 ms | once | 2 | 2 | 17.4 ms |
| https://www.proantic.com/antiquaires.php:4765 | 0 ms | once | 1 | 1 | 0.7 ms |
ld in https://www.googletagmanager.com/gtag/js?id=G-YP51KSLLWR:256 | 86400000 ms | recurring | 1 | 0 | 0.0 ms |
Main-thread CPU time from the Chrome trace split by domain. First party is proantic.com.
Want to dig deeper? Download the Chrome trace and drag-and-drop it into Performance in DevTools.
Third party requests categorised by Third party web version 0.29.2.
Requests by category6
Transfer size2.3 MB
Content size4.2 MB
Requests41
Calculated using .*proantic.* (use --firstParty to configure).
| Content | Header Size | Transfer Size | Content Size | Requests |
|---|---|---|---|---|
| html | 0 b | 115.5 KB | 1.2 MB | 1 |
| css | 0 b | 76.7 KB | 350.7 KB | 7 |
| javascript | 0 b | 48.5 KB | 80.4 KB | 2 |
| image | 0 b | 1.2 MB | 1.2 MB | 14 |
| font | 0 b | 639.0 KB | 635.3 KB | 10 |
| favicon | 0 b | 0 b | 0 b | 0 |
| json | 0 b | 701 B | 287 B | 2 |
| other | 0 b | 0 b | 0 b | 1 |
| Total | N/A | 2.0 MB | 3.4 MB | 37 |
| Content | Header Size | Transfer Size | Content Size | Requests |
|---|---|---|---|---|
| html | 0 b | 0 b | 0 b | 0 |
| css | 0 b | 0 b | 0 b | 0 |
| javascript | 0 b | 251.8 KB | 818.2 KB | 4 |
| image | 0 b | 0 b | 0 b | 0 |
| font | 0 b | 0 b | 0 b | 0 |
| favicon | 0 b | 0 b | 0 b | 0 |
| Total | N/A | 251.8 KB | 818.2 KB | 4 |
Axe is an accessibility testing engine for websites and other HTML-based user interfaces. Tested using axe-core version 4.11.4. Read more about axe-core.
4 accessibility rules failed, affecting 11 elements.
Start with the 2 serious issues.
color-contrastEnsure the contrast between foreground and background colors meets WCAG 2 AA minimum contrast ratio thresholds
Read the axe-core docs for this rule →
Fix any of the following: Element has insufficient color contrast of 2.68 (foreground color: #bc9956, background color: #ffffff, font size: 24.0pt (32px), font weight: normal). Expected contrast ratio of 3:1
<span>PROANTIC</span><a class="nav-menu-hover-a" href="https://www.proantic.com/antiquites-nouveautes">nouveautés</a><div class="navlink loginlink">
Mon compte </div><input type="submit" value="Je m'abonne" name="subscribe" id="mc-embedded-subscribe" class="mailchimp-button button">link-nameEnsure links have discernible text
Read the axe-core docs for this rule →
Fix all of the following: Element is in tab order and does not have accessible text Fix any of the following: Element does not have text that is visible to screen readers aria-label attribute does not exist or is empty aria-labelledby attribute does not exist, references elements that do not exist or references elements that are empty Element has no title attribute
<a href="https://www.proantic.com/antiquaires.php?&page=2&paysfiltre=33">
<i class="fa-xl fa-thin fa-chevron-right"></i>
</a><a href="https://www.proantic.com/antiquaires.php?&page=2&paysfiltre=33">
<i class="fa-xl fa-thin fa-chevron-right"></i>
</a>landmark-uniqueEnsure landmarks are unique
Read the axe-core docs for this rule →
Fix any of the following: The landmark must have a unique aria-label, aria-labelledby, or title to make landmarks distinguishable
<nav id="totop" class="navbar">regionEnsure all page content is contained by landmarks
Read the axe-core docs for this rule →
Fix any of the following: Some page content is not contained by landmarks
<h2 class="h1-style">Recevez notre newsletter</h2><label class="sr-only" for="mce-EMAIL">email</label><input type="email" value="" name="EMAIL" class="email" id="mce-EMAIL" placeholder="email" required=""><div class="section-suivez-nous-sociaux">