js.org speed test — 20 Oct 2026

Measured from the wfix.shop server on 20 October 2026 at 13:50 UTC. Grade A (93/100), with the screenshots, the timings and the fixes that matter.

https://js.org/

20 October 2026 at 13:50 UTC · Free test · report pt_7356ef2ef50d
Grade
A
93/100
Performance94/100
Structure91/100

13 audit(s) passed, 3 need work

First byte (TTFB)352 msmeasured from this server
Fully loaded1.90 sfirst byte + slowest asset
Requests11document + assets
Page weight56.0 KBcompressed transfer
HTML document5.7 KBgzip
ProtocolHTTP/3cloudflare
Third-party17.0 KBother hosts

Where the first byte went

  • DNS lookup 83 ms 24%
  • TCP connect 6 ms 2%
  • Server wait 264 ms 75%

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 91% of 4,999 pages tested here56.0 KB against a median of 650.5 KB
Fully loadedslower than 53% of 4,999 pages tested here1.90 s against a median of 1.84 s
Requestssends fewer requests than 87% of 4,999 pages tested here11 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 56.0 KB over 11 request(s), which is lean. Fonts files are 52% of it, so subset the fonts and stop preloading the weights you do not render.
  • The HTML itself arrives gzip-compressed.
  • It runs over HTTP/3, so the assets share a connection instead of opening one each.
  • 30% 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 412 ms, inside the 2.5 s Google calls good.
  • Layout stayed still (CLS 0.010), so nothing jumps under the reader's cursor.

Fix first: Cache static assets - Version filenames on change and serve them with a long max-age plus immutable. That is what makes a returning visitor fast.

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 js.org
Mobile 390 × 844 · 43.1 KB · page is 1656 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 paint412 msgood is under 2.5 s
Cumulative layout shift0.010under 0.1 is stable
Total blocking timenone over 50 mslong tasks during load
First contentful paint412 msfirst content on screen
Browser page weight79.7 KB15 request(s), scripts included
Largest contentful paint412 ms
Goodgood under 2.5 s, poor over 4 s
Cumulative layout shift0.010
Goodgood under 0.1, poor over 0.25
Total blocking timenone over 50 ms
Goodgood under 200 ms, poor over 600 ms

Page weight by type

What the page is made of

Fonts 2 requests
29.4 KB 52%
Javascript 3 requests
17.7 KB 32%
Images 4 requests
3.1 KB 6%
Other 1 request
102 B 0%

Transfer size, compressed as sent. 11 request(s) in total, 56.0 KB across all of them.

Top issues

Cache static assets

medium impact

2 asset(s) answer without a Cache-Control max-age, so browsers revalidate them on every visit.

Fix: Version filenames on change and serve them with a long max-age plus immutable. That is what makes a returning visitor fast.

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.

Strict-Transport-Security

low impact

HSTS 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

JAVASCRIPTcdn.carbonads.com/carbon.js
1.54 s
JAVASCRIPTm.servedby-buysellads.com/monetization.custom.js
1.52 s
IMAGESjs.org/ico/favicon-32.png
658 ms
IMAGESjs.org/ico/apple-touch-icon.png
623 ms
IMAGESjs.org/favicon.png
572 ms
FONTSjs.org/fnt/source-sans-3-v9-latin-600.woff2
564 ms
FONTSjs.org/fnt/source-sans-3-v9-latin-regular.woff2
561 ms
IMAGESjs.org/ico/favicon.svg
535 ms
JAVASCRIPTjs.org/main.js
515 ms
OTHERjs.org/manifest.webmanifest
493 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://cdn.carbonads.com/carbon.js?serve=CESD4K3E&placement=jsorg 3rd partyjavascript2001.54 s10.3 KB
https://m.servedby-buysellads.com/monetization.custom.js 3rd partyjavascript2001.52 s6.7 KB
https://js.org/ico/favicon-32.pngimages200658 ms688 B
https://js.org/ico/apple-touch-icon.pngimages200623 ms1.1 KB
https://js.org/favicon.pngimages200572 ms923 B
https://js.org/fnt/source-sans-3-v9-latin-600.woff2fonts200564 ms14.7 KB
https://js.org/fnt/source-sans-3-v9-latin-regular.woff2fonts200561 ms14.7 KB
https://js.org/ico/favicon.svgimages200535 ms411 B
https://js.org/main.jsjavascript200515 ms740 B
https://js.org/manifest.webmanifestother200493 ms102 B
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