opensource.org speed test — 20 Oct 2026

Measured from the wfix.shop server on 20 October 2026 at 13:14 UTC. Grade A (93/100), with the screenshots, the timings and the fixes that matter.

https://opensource.org/

20 October 2026 at 13:14 UTC · Free test · report pt_23236e5d86ee
Grade
A
93/100
Performance96/100
Structure88/100

14 audit(s) passed, 2 need work

First byte (TTFB)352 msmeasured from this server
Fully loaded1.44 sfirst byte + slowest asset
Requests26document + assets
Page weight634.4 KBcompressed transfer
HTML document37.8 KBbr
ProtocolHTTP/3cloudflare
Third-party495.4 KBother hosts

Where the first byte went

  • DNS lookup 99 ms 28%
  • TCP connect 45 ms 13%
  • Server wait 208 ms 59%

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

First bytefaster than 64% of 4,999 pages tested here352 ms against a median of 449 ms
Page weightlighter than 51% of 4,999 pages tested here634.4 KB against a median of 650.5 KB
Fully loadedfaster than 74% of 4,999 pages tested here1.44 s against a median of 1.84 s
Requestssends more requests than 100% of 4,999 pages tested here26 against a median of 26

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 352 ms. That is workable, and the cheapest win left is caching or a warmer connection.
  • The page transfers 634.4 KB over 26 request(s). Images files are 94% of it, so resize and recompress the largest images before anything else.
  • The HTML itself arrives br-compressed.
  • It runs over HTTP/3, so the assets share a connection instead of opening one each.
  • 78% of the weight comes from other hosts (analytics, fonts, embeds), which also means their slow day becomes your slow day.
  • The largest element painted at 876 ms, inside the 2.5 s Google calls good.
  • Layout stayed still (CLS 0.001), so nothing jumps under the reader's cursor.
  • The main thread was blocked for 77 ms in total, which is not enough to feel.

Fix first: Render-blocking resources - 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.

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.

Desktop screenshot of opensource.org
Desktop 1366 × 768 · 74.9 KB · page is 4231 px tall
Mobile screenshot of opensource.org
Mobile 390 × 844 · 41.7 KB · page is 5390 px tall

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.

Largest contentful paint876 msgood is under 2.5 s
Cumulative layout shift0.001under 0.1 is stable
Total blocking time77 mslong tasks during load
First contentful paint876 msfirst content on screen
Browser page weight1.22 MB98 request(s), scripts included
Largest contentful paint876 ms
Goodgood under 2.5 s, poor over 4 s
Cumulative layout shift0.001
Goodgood under 0.1, poor over 0.25
Total blocking time77 ms
Goodgood under 200 ms, poor over 600 ms

Page weight by type

What the page is made of

Images 25 requests
596.6 KB 94%

Transfer size, compressed as sent. 26 request(s) in total, 634.4 KB across all of them.

Top issues

Render-blocking resources

high impact

43 render-blocking resource(s) in the document head (14 script(s), 29 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.

Third-party weight

medium impact

1 third-party host(s) serve 495.4 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.

Waterfall

Slowest requests

IMAGESopensource.org/wp-content/uploads/2025/06/sloan-1.svg
1.09 s
IMAGESopensource.org/wp-content/uploads/2025/06/apache.svg
1.08 s
IMAGESi0.wp.com/opensource.org/wp-content/uploads/2025…
1.08 s
IMAGESi0.wp.com/opensource.org/wp-content/uploads/2025…
1.07 s
IMAGESi0.wp.com/opensource.org/wp-content/uploads/2025…
1.07 s
IMAGESi0.wp.com/opensource.org/wp-content/uploads/2016…
1.06 s
IMAGESi0.wp.com/opensource.org/wp-content/uploads/2025…
1.06 s
IMAGESi0.wp.com/opensource.org/wp-content/uploads/2026…
1.05 s
IMAGESi0.wp.com/opensource.org/wp-content/uploads/2023…
1.05 s
IMAGESi0.wp.com/opensource.org/wp-content/uploads/2024…
1.05 s

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

RequestTypeStatusTimeSize
https://opensource.org/wp-content/uploads/2025/06/sloan-1.svgimages2001.09 s28.6 KB
https://opensource.org/wp-content/uploads/2025/06/apache.svgimages2001.08 s4.2 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2025/06/s-blob-v1-IMAGE-3ICZEWiiYz4.webp?w=640&quality=80&ssl=1 3rd partyimages2001.08 s36.0 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2025/06/s-blob-v1-IMAGE-3ICZEWiiYz4.webp?resize=640%2C640&quality=80&ssl=1 3rd partyimages2001.07 s36.0 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2025/06/image-1.png?w=768&quality=80&ssl=1 3rd partyimages2001.07 s42.1 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2016/03/OSCON2015.jpg?fit=600%2C360&quality=89&ssl=1 3rd partyimages2001.06 s72.2 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2025/06/image-1.png?fit=640%2C361&quality=80&ssl=1 3rd partyimages2001.06 s30.2 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2026/09/Open-Source-101.jpg?w=960&quality=89&ssl=1 3rd partyimages2001.05 s37.4 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2023/12/open_policy_alliance.jpeg?w=1289&quality=89&ssl=1 3rd partyimages2001.05 s54.6 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2024/12/osaid_homepage.png?w=1366&quality=80&ssl=1 3rd partyimages2001.05 s52.8 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2023/12/open_policy_alliance.jpeg?fit=640%2C380&quality=89&ssl=1 3rd partyimages2001.05 s23.6 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2026/09/Open-Source-101.jpg?fit=640%2C360&quality=89&ssl=1 3rd partyimages2001.05 s24.3 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2023/03/osi-approved-license-logo-padded-1.png?fit=640%2C256&quality=80&ssl=1 3rd partyimages2001.04 s9.9 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2023/03/osi-approved-license-logo-padded-1.png?w=900&quality=80&ssl=1 3rd partyimages2001.04 s11.9 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2024/12/osaid_homepage.png?fit=640%2C353&quality=80&ssl=1 3rd partyimages2001.03 s19.6 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2023/03/cropped-OSI-horizontal-large.png?fit=640%2C229&quality=80&ssl=1 3rd partyimages2001.02 s13.4 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2022/04/blog-sample-two.png?fit=540%2C285&quality=80&ssl=1 3rd partyimages2001.02 s13.2 KB
https://i0.wp.com/opensource.org/wp-content/uploads/2022/04/blog-sample-two.png?w=540&quality=80&ssl=1 3rd partyimages2001.02 s13.2 KB
https://opensource.org/wp-content/uploads/2025/06/psf-2.svgimages2001.02 s40.5 KB
https://opensource.org/wp-content/uploads/2025/06/google-ospo-2.svgimages2001.02 s12.9 KB
https://opensource.org/wp-content/uploads/2025/06/cisco-2.svgimages2001.02 s9.1 KB
https://opensource.org/wp-content/uploads/2025/06/automattic-2.svgimages2001.02 s3.8 KB
https://opensource.org/wp-content/uploads/2025/06/eclipse-2.svgimages2001.02 s1.4 KB
https://opensource.org/wp-content/uploads/2025/06/mozilla.svgimages2001.02 s840 B
https://i0.wp.com/opensource.org/wp-content/uploads/2025/06/bloomberg-1.png?resize=450%2C220&quality=80&ssl=1 3rd partyimages2001.02 s4.8 KB
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