libpng.org speed test — 20 Oct 2026
Measured from the wfix.shop server on 20 October 2026 at 14:03 UTC. Grade A (92/100), with the screenshots, the timings and the fixes that matter.
Where the first byte went
- DNS lookup 114 ms 33%
- TCP connect 61 ms 18%
- Server wait 172 ms 50%
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 347 ms. That is workable, and the cheapest win left is caching or a warmer connection.
- The page transfers 10.0 KB over 6 request(s), which is lean. Images files are 70% of it, so resize and recompress the largest images before anything else.
- It runs over HTTP/2, so the assets share a connection instead of opening one each.
- The largest element painted at 312 ms, inside the 2.5 s Google calls good.
Fix first: Serve everything over HTTPS - Redirect HTTP to HTTPS at the server, and rewrite the remaining http:// asset references so nothing depends on browser upgrading.
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. 6 request(s) in total, 10.0 KB across all of them.
Top issues
Serve everything over HTTPS
high impact1 asset(s) are still requested over plain HTTP.
Fix: Redirect HTTP to HTTPS at the server, and rewrite the remaining http:// asset references so nothing depends on browser upgrading.
Mobile viewport
medium impactNo viewport meta tag, so a phone renders the desktop layout scaled down.
Fix: Add a viewport meta tag with width=device-width and an initial scale of 1.
Strict-Transport-Security
low impactHSTS is not set, so the first visit on a hostile network can still be downgraded to HTTP.
Fix: Send Strict-Transport-Security with a max-age of at least six months. Add includeSubDomains once every subdomain is HTTPS.
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://libpng.org/pub/png/img_png/pngnow.png | images | 200 | 374 ms | 2.1 KB |
| https://libpng.org/pub/png/img_png/libpng-88x31.png | images | 200 | 348 ms | 258 B |
| https://libpng.org/pub/mng/img_mng/mngnow-bearcy.png | images | 200 | 346 ms | 2.2 KB |
| https://libpng.org/pub/mng/img_mng/libmng.png | images | 200 | 330 ms | 2.4 KB |
| http://sflogo.sourceforge.net/sflogo.php?group_id=32355&type=9 3rd party | html | 301 | 296 ms | 167 B |
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