clerk.com speed test — 20 Oct 2026

Measured from the wfix.shop server on 20 October 2026 at 14:08 UTC. Grade A (94/100), with the screenshots, the timings and the fixes that matter.

https://clerk.com/

20 October 2026 at 14:08 UTC · Free test · report pt_e906826ae3a9
Grade
A
94/100
Performance95/100
Structure92/100

14 audit(s) passed, 2 need work

First byte (TTFB)380 msmeasured from this server
Fully loaded1.60 sfirst byte + slowest asset
Requests26document + assets
Page weight348.8 KBcompressed transfer
HTML document98.6 KBbr
ProtocolHTTP/3Vercel

Where the first byte went

  • DNS lookup 57 ms 15%
  • TCP connect 82 ms 22%
  • Server wait 242 ms 64%

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 60% of 4,999 pages tested here380 ms against a median of 449 ms
Page weightlighter than 68% of 4,999 pages tested here348.8 KB against a median of 650.5 KB
Fully loadedfaster than 64% of 4,999 pages tested here1.60 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 380 ms. That is workable, and the cheapest win left is caching or a warmer connection.
  • The page transfers 348.8 KB over 26 request(s). Images files are 72% 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.
  • The largest element painted at 684 ms, inside the 2.5 s Google calls good.
  • The main thread was blocked for 796 ms, so taps and scrolling wait while scripts run.

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 clerk.com
Mobile 390 × 844 · 62.4 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 paint684 msgood is under 2.5 s
Cumulative layout shift0.000under 0.1 is stable
Total blocking time796 mslong tasks during load
First contentful paint480 msfirst content on screen
Browser page weight2.38 MB121 request(s), scripts included
Failed requests2blocked or unreachable
Largest contentful paint684 ms
Goodgood under 2.5 s, poor over 4 s
Cumulative layout shift0.000
Goodgood under 0.1, poor over 0.25
Total blocking time796 ms
Poorgood under 200 ms, poor over 600 ms

Page weight by type

What the page is made of

Images 25 requests
250.2 KB 72%

Transfer size, compressed as sent. 26 request(s) in total, 348.8 KB across all of them.

Top issues

Render-blocking resources

high impact

4 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.

HTML document size

medium impact

The document transfers 98.6 KB. A bloated document delays every other request, because nothing else can start until it is parsed.

Fix: Paginate long listings, move repeated markup into a template, and stop inlining large data URIs into the HTML.

Waterfall

Slowest requests

IMAGESclerk.com/_next/image
1.22 s
IMAGESclerk.com/_next/image
1.22 s
IMAGESclerk.com/_next/image
1.20 s
IMAGESclerk.com/_next/image
1.18 s
IMAGESclerk.com/_next/image
1.17 s
IMAGESclerk.com/_next/image
1.16 s
IMAGESclerk.com/_next/image
1.15 s
IMAGESclerk.com/_next/image
1.14 s
IMAGESclerk.com/_next/image
1.13 s
IMAGESclerk.com/_next/image
1.12 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://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fpricing-table_2x.2nk9n3cy07p29.webp&w=32&q=90images2001.22 s667 B
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fcreate-organization_2x.1zyw5onyavff7.webp&w=32&q=90images2001.22 s603 B
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fuser-profile-billing_2x.0d77_z6a29tqg.webp&w=640&q=90images2001.20 s12.0 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fsign-up_2x.2eoh00kayhjvu.webp&w=32&q=90images2001.18 s724 B
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fuser-profile_2x.05rljjdinsruf.webp&w=640&q=90images2001.17 s16.0 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fuser-button-popover_2x.2-p7mfgt9se0x.webp&w=32&q=90images2001.16 s449 B
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Forganization-list_2x.16lz1x64a1any.webp&w=32&q=90images2001.15 s655 B
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fwaitlist_2x.1_n8sh2w6ynyu.webp&w=32&q=90images2001.14 s589 B
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fsign-in_2x.1gmw0wa141dem.webp&w=32&q=90images2001.13 s683 B
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fwaitlist_2x.1_n8sh2w6ynyu.webp&w=3840&q=90images2001.12 s15.5 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Forganization-list_2x.16lz1x64a1any.webp&w=3840&q=90images2001.10 s21.5 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fuser-button-popover_2x.2-p7mfgt9se0x.webp&w=3840&q=90images2001.08 s8.7 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fsign-in_2x.1gmw0wa141dem.webp&w=3840&q=90images2001.08 s17.7 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Forganization-switcher_2x.246pgq5gzby42.webp&w=32&q=90images2001.06 s521 B
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fuser-profile-billing_2x.0d77_z6a29tqg.webp&w=3840&q=90images2001.06 s22.1 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Forganization-profile-billing_2x.3r5x2c2ya-3fr.webp&w=3840&q=90images2001.05 s22.9 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fuser-button-trigger%403x.02lbby1nnnz8i.png&w=96&q=90images2001.04 s5.9 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fpricing-table_2x.2nk9n3cy07p29.webp&w=3840&q=90images2001.04 s16.9 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Forganization-switcher-trigger_2x.37g9n_iubpf6o.webp&w=750&q=90images2001.04 s2.2 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fcreate-organization_2x.1zyw5onyavff7.webp&w=3840&q=90images2001.03 s13.9 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fuser-profile_2x.05rljjdinsruf.webp&w=3840&q=90images2001.03 s27.1 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fsign-up_2x.2eoh00kayhjvu.webp&w=3840&q=90images2001.03 s23.5 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Forganization-switcher_2x.246pgq5gzby42.webp&w=3840&q=90images2001.02 s11.4 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Fuser-button-trigger%403x.02lbby1nnnz8i.png&w=256&q=90images2001.01 s5.9 KB
https://clerk.com/_next/image?url=%2F_next%2Fstatic%2Fimmutable%2Fmedia%2Forganization-switcher-trigger_2x.37g9n_iubpf6o.webp&w=384&q=90images200992 ms2.2 KB
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