mangadex.org speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 14:42 UTC. Grade A (92/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 74 ms 17%
- TCP connect 54 ms 12%
- Server wait 320 ms 71%
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 arrived in 448 ms. That is workable, and the cheapest win left is caching or a warmer connection.
- The page transfers 5.1 KB over 10 request(s), which is lean.
- The HTML itself arrives gzip-compressed.
- It runs over HTTP/3, so the assets share a connection instead of opening one each.
- The largest element took 3.96 s to paint, past the 2.5 s threshold: usually a hero image that is too big or a render-blocking script in front of it.
- Layout stayed still (CLS 0.092), so nothing jumps under the reader's cursor.
- The main thread was blocked for 478 ms, so taps and scrolling wait while scripts run.
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.
Screenshot
What the page looks like
Loaded in headless Chromium on this server. Click an image to open it full size.
Browser render
The same URL loaded in a real browser, so these are the readings curl cannot produce. The grade above is still built from the server measurements.
Page weight by type
What the page is made of
Transfer size, compressed as sent. 10 request(s) in total, 5.1 KB across all of them.
Top issues
Server response time (TTFB)
high impactThe first byte arrived after 448 ms. Of that, 320 ms was the server thinking and 128 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.
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://mangadex.org/favicon.svg | other | 405 | 537 ms | 14 B |
| https://mangadex.org/assets/index-CYqsbKEl.js | other | 405 | 525 ms | 14 B |
| https://mangadex.org/favicon.ico | other | 405 | 523 ms | 14 B |
| https://mangadex.org/img/cat-books.svg | other | 405 | 509 ms | 14 B |
| https://mangadex.org/manifest.webmanifest | other | 405 | 504 ms | 14 B |
| https://mangadex.org/assets/vendor-DjMxu4j7.css | other | 405 | 499 ms | 14 B |
| https://mangadex.org/assets/index-CsFLUeSn.css | other | 405 | 491 ms | 14 B |
| https://mangadex.org/assets/pg-index-qyQqjzdJ.css | other | 405 | 488 ms | 14 B |
| https://mangadex.org/pwa/icons/icon-180.png | other | 405 | 477 ms | 14 B |
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