stackexchange.com speed test — 20 Oct 2026

Measured from the wfix.shop server on 20 October 2026 at 12:30 UTC. Grade A (94/100), with the screenshots, the timings and the fixes that matter.

https://stackexchange.com/

20 October 2026 at 12:30 UTC · Free test · report pt_a352fdf5342f
Grade
A
94/100
Performance100/100
Structure85/100

13 audit(s) passed, 3 need work

First byte (TTFB)170 msmeasured from this server
Fully loaded1.12 sfirst byte + slowest asset
Requests26document + assets
Page weight52.2 KBcompressed transfer
HTML document17.4 KBgzip
ProtocolHTTP/3cloudflare
Third-party33.4 KBother hosts

Where the first byte went

  • DNS lookup 52 ms 31%
  • TCP connect 4 ms 2%
  • Server wait 113 ms 66%

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 96% of 4,999 pages tested here170 ms against a median of 449 ms
Page weightlighter than 91% of 4,999 pages tested here52.2 KB against a median of 650.5 KB
Fully loadedfaster than 90% of 4,999 pages tested here1.12 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 server answered in 170 ms, which is fast: almost all of the wait is the page itself, not the host.
  • The page transfers 52.2 KB over 26 request(s). Images files are 67% of it, so resize and recompress the largest images before anything else.
  • The HTML itself arrives gzip-compressed.
  • It runs over HTTP/3, so the assets share a connection instead of opening one each.
  • 64% 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 656 ms, inside the 2.5 s Google calls good.
  • The main thread was blocked for 23 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.

Mobile screenshot of stackexchange.com
Mobile 390 × 844 · 89.4 KB · page is 6000 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 paint656 msgood is under 2.5 s
Cumulative layout shift0.000under 0.1 is stable
Total blocking time23 mslong tasks during load
First contentful paint656 msfirst content on screen
Browser page weight361.8 KB65 request(s), scripts included
Failed requests1blocked or unreachable
Largest contentful paint656 ms
Goodgood under 2.5 s, poor over 4 s
Cumulative layout shift0.000
Goodgood under 0.1, poor over 0.25
Total blocking time23 ms
Goodgood under 200 ms, poor over 600 ms

Page weight by type

What the page is made of

Images 25 requests
34.8 KB 67%

Transfer size, compressed as sent. 26 request(s) in total, 52.2 KB across all of them.

Top issues

Render-blocking resources

high impact

7 render-blocking resource(s) in the document head (4 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.

Mobile viewport

medium impact

No 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.

Third-party weight

low impact

23 third-party host(s) serve 33.4 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

IMAGESphilosophy.stackexchange.com/Content/Sites/philosophy/Img/icon-48.png
945 ms
IMAGEScodereview.stackexchange.com/Content/Sites/codereview/Img/icon-48.png
911 ms
IMAGESbuddhism.stackexchange.com/Content/Sites/buddhism/Img/icon-48.png
902 ms
IMAGESstackexchange.com/Content/Img/hero/hero-illustration.svg
901 ms
IMAGESworldbuilding.stackexchange.com/Content/Sites/worldbuilding/Img/apple-…
899 ms
IMAGESrussian.stackexchange.com/Content/Sites/russian/Img/icon-48.png
891 ms
IMAGESbricks.stackexchange.com/Content/Sites/bricks/Img/icon-48.png
889 ms
IMAGESworldbuilding.stackexchange.com/Content/Sites/worldbuilding/Img/icon-4…
881 ms
IMAGEStravel.stackexchange.com/Content/Sites/travel/Img/icon-48.png
874 ms
IMAGESi.sstatic.net/rUS33ZTk.webp
873 ms

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://philosophy.stackexchange.com/Content/Sites/philosophy/Img/icon-48.png 3rd partyimages200945 ms831 B
https://codereview.stackexchange.com/Content/Sites/codereview/Img/icon-48.png 3rd partyimages200911 ms1.2 KB
https://buddhism.stackexchange.com/Content/Sites/buddhism/Img/icon-48.png 3rd partyimages200902 ms1.5 KB
https://stackexchange.com/Content/Img/hero/hero-illustration.svgimages200901 ms1.4 KB
https://worldbuilding.stackexchange.com/Content/Sites/worldbuilding/Img/apple-touch-icon.png 3rd partyimages200899 ms6.9 KB
https://russian.stackexchange.com/Content/Sites/russian/Img/icon-48.png 3rd partyimages200891 ms430 B
https://bricks.stackexchange.com/Content/Sites/bricks/Img/icon-48.png 3rd partyimages200889 ms501 B
https://worldbuilding.stackexchange.com/Content/Sites/worldbuilding/Img/icon-48.png 3rd partyimages200881 ms1.9 KB
https://travel.stackexchange.com/Content/Sites/travel/Img/icon-48.png 3rd partyimages200874 ms1.8 KB
https://i.sstatic.net/rUS33ZTk.webp?s=64 3rd partyimages200873 ms1.2 KB
https://puzzling.stackexchange.com/Content/Sites/puzzling/Img/icon-48.png 3rd partyimages200867 ms3.9 KB
https://mathoverflow.net/Content/Sites/mathoverflow/Img/icon-48.png 3rd partyimages200867 ms2.1 KB
https://biology.stackexchange.com/Content/Sites/biology/Img/icon-48.png 3rd partyimages200867 ms2.1 KB
https://law.stackexchange.com/Content/Sites/law/Img/icon-48.png 3rd partyimages200867 ms1.3 KB
https://scifi.stackexchange.com/Content/Sites/scifi/Img/icon-48.png 3rd partyimages200867 ms1.2 KB
https://gamedev.stackexchange.com/Content/Sites/gamedev/Img/icon-48.png 3rd partyimages200867 ms933 B
https://physics.stackexchange.com/Content/Sites/physics/Img/icon-48.png 3rd partyimages200867 ms776 B
https://mechanics.stackexchange.com/Content/Sites/mechanics/Img/icon-48.png 3rd partyimages200867 ms696 B
https://rpg.stackexchange.com/Content/Sites/rpg/Img/icon-48.png 3rd partyimages200867 ms667 B
https://english.stackexchange.com/Content/Sites/english/Img/icon-48.png 3rd partyimages200867 ms457 B
https://hermeneutics.stackexchange.com/Content/Sites/hermeneutics/Img/icon-48.png 3rd partyimages200867 ms431 B
https://astronomy.stackexchange.com/Content/Sites/astronomy/Img/icon-48.png 3rd partyimages200867 ms431 B
https://stackoverflow.com/Content/Sites/stackoverflow/Img/icon-48.png 3rd partyimages200867 ms353 B
https://tex.stackexchange.com/Content/Sites/tex/Img/icon-48.png 3rd partyimages200866 ms1.2 KB
https://www.gravatar.com/avatar/1c5dc95555301bb6979860103001954a?s=36&d=identicon&r=PG&s=64 3rd partyimages200862 ms646 B
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