api.whatsapp.com speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 12:33 UTC. Grade B (87/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 63 ms 11%
- TCP connect 104 ms 19%
- Server wait 384 ms 70%
Measured on the connection that fetched the HTML. Every other request on the page waits for the end of this bar before it can start.
How this page compares
Every report published here is in this comparison, so it is a reference population of pages tested from one server - not a benchmark of the whole web.
What these numbers mean
- The first byte took 550 ms. Everything else waits for that number, so the server is where to start: caching, a slow query, or an overloaded host.
- The page transfers 329.7 KB over 13 request(s), which is lean. Javascript files are 80% of it, so defer what is not needed for the first screen, and drop tags nobody uses.
- The HTML itself arrives zstd-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- 89% of the weight comes from other hosts (analytics, fonts, embeds), which also means their slow day becomes your slow day.
Fix first: Server response time (TTFB) - Cut server think time: page cache, query indexes, fewer synchronous calls to third parties inside the request. Connection setup is distance, so a nearer region or a CDN edge helps instead.
Read on one shared server, not a visitor's phone: use it to compare pages against each other, not as a promise about every connection. We fix what these tests find.
The headless browser did not capture this page when the test ran, so only the server measurements are shown.
Page weight by type
What the page is made of
Transfer size, compressed as sent. 13 request(s) in total, 329.7 KB across all of them.
Top issues
Server response time (TTFB)
high impactThe first byte arrived after 550 ms. Of that, 384 ms was the server thinking and 167 ms was connection setup. A first byte under 400 ms is what a visitor feels as instant.
Fix: Cut server think time: page cache, query indexes, fewer synchronous calls to third parties inside the request. Connection setup is distance, so a nearer region or a CDN edge helps instead.
Render-blocking resources
high impact4 render-blocking resource(s) in the document head (1 script(s), 3 stylesheet(s)). The page cannot paint until each one arrives.
Fix: Add defer or async to scripts that do not change the first paint, inline the critical CSS, and load the rest with media="print" plus an onload swap.
TLS certificate validity
high impactThe certificate for api.whatsapp.com has 7 day(s) left.
Fix: Renew automatically (certbot with a working renewal timer) and alert on the certificate, not on the renew command, so a silent failure is caught weeks before a browser warning.
Third-party weight
medium impact1 third-party host(s) serve 293.4 KB of this page. Each one is another DNS lookup, TLS handshake and point of failure you do not control.
Fix: Self-host the libraries you can, drop the tags you cannot justify, and preconnect the ones you keep.
Avoid extra redirects
medium impact1 redirect hop(s) before the page load started, each one a full round trip before the first byte.
Fix: Link to the canonical URL (and make sure http, the apex domain and www all point at it) so no visitor pays a redirect first.
Waterfall
Slowest requests
Each bar is one request's own response time, scaled to the slowest. Assets were fetched in parallel, so the bars overlap in real time rather than stacking. first party third party
| Request | Type | Status | Time | Size |
|---|---|---|---|---|
| https://api.whatsapp.com/data/manifest.json | html | 404 | 975 ms | 0 B |
| https://static.whatsapp.net/rsrc.php/v5/yt/l/0,cross/MdsKUYtqiGZ.css 3rd party | css | 200 | 915 ms | 8.8 KB |
| https://static.whatsapp.net/rsrc.php/v5/yk/l/0,cross/AiIZ-COK6vO.css 3rd party | css | 200 | 869 ms | 15.7 KB |
| https://static.whatsapp.net/rsrc.php/v4/yj/r/a6juo0iGOid.js 3rd party | javascript | 200 | 822 ms | 116.3 KB |
| https://static.whatsapp.net/rsrc.php/v5/yH/l/0,cross/_jfkUskf2-v.css 3rd party | css | 200 | 822 ms | 1.6 KB |
| https://static.whatsapp.net/rsrc.php/yJ/r/twC7frrXavH.svg 3rd party | images | 200 | 820 ms | 1.5 KB |
| https://static.whatsapp.net/rsrc.php/y1/r/FJbTMJqMap7.svg 3rd party | images | 200 | 820 ms | 620 B |
| https://static.whatsapp.net/rsrc.php/v4/y0/r/GahfpYOaDHZ.js 3rd party | javascript | 200 | 817 ms | 85.0 KB |
| https://static.whatsapp.net/rsrc.php/v4/y4/r/CX1pIUscJnX.js 3rd party | javascript | 200 | 816 ms | 18.7 KB |
| https://static.whatsapp.net/rsrc.php/yM/r/ys-5GPT4pwS.svg 3rd party | images | 200 | 816 ms | 1.5 KB |
| https://static.whatsapp.net/rsrc.php/v4i7M54/yI/l/en_US-j/st2VSfEHJiw.js 3rd party | javascript | 200 | 815 ms | 29.8 KB |
| https://static.whatsapp.net/rsrc.php/v4/yE/r/-Tn_cQQIVNc.js 3rd party | javascript | 200 | 814 ms | 14.0 KB |
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