speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time. Follow us on Mastodon or Bluesky.

Charts Compare Measurement runs Embed a score Open to Work

tanstack.com

https://tanstack.com/

62PERF 84A11Y 100BEST 92SEO ✗AXE !CWV

Ranks Overall #1,697 Developer Tooling #80 Frameworks and Libraries #14

Data from Oct 10, 2026, 11:44 PM UTC old Measured every 2 days · 26 runs since Aug 21, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Vite Built with Vite
Cloudflare Hosted by Cloudflare

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 24.11 s. Compare this filmstrip against another site.

  1. 3.01 s
  2. 3.20 s
  3. 9.04 s
  4. 12.05 s
  5. 15.07 s
  6. 18.08 s
  7. 21.10 s
  8. 24.11 s

Lighthouse Scores LAB Simulated

62
Performance
↑ +3 (+5.1%)
84
Accessibility
no change
100
Best Practices
no change
92
SEO
no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-11 → 2026-10-08), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 5.82 s poor ↓ -192 ms (-3.2%) 4.60 s – 9.53 s 3.61 s needs work 52.6% 28.2% 19.1%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 278 ms needs work 57.8% 32.9% 9.3%
CLS CWV Cumulative Layout Shift 0.034 good → no change 0 – 0.034 0.010 good 93.3% 3.6% 3.1%
TBT Total Blocking Time 296 ms needs work ↓ -85 ms (-22.3%) 273 ms – 706 ms n/a —
FCP First Contentful Paint 4.21 s poor ↓ -80 ms (-1.9%) 3.10 s – 4.71 s 3.45 s poor 36.2% 30.9% 33%
Speed Index 4.21 s needs work ↓ -80 ms (-1.9%) 3.18 s – 5.96 s n/a —
TTFB Time to First Byte 480 ms good ↑ +1 ms (+0.2%) 473 ms – 907 ms 2.71 s poor 22.9% 30.7% 46.4%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

resource load duration 1.62 s
element render delay 1.04 s
time to first byte 667 ms
resource load delay 58 ms

LCP LAB Simulated vs LCP FIELD

Lab 5.82 s
Field p75 3.61 s

The lab LCP is 1.61× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 3.09 MB ↓ -614 B 3.07 MB – 3.11 MB
Requests 70 → no change 57 – 71
Third-party Weight 121 kB ↓ -194 B (-0.2%) 118 kB – 121 kB
Third-party CPU 5 ms ↓ -1 ms (-16.9%) 1 ms – 6 ms
Unused JS 217 kB ↓ -713 B (-0.3%) 210 kB – 373 kB
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
media 50.9% 1.57 MB 1
script 21.9% 675 kB 44
image 17% 526 kB 7
font 5.8% 181 kB 5
stylesheet 2.4% 75.6 kB 2
document 1.4% 44.4 kB 1
other 0.4% 13.5 kB 9
Total 3.09 MB 70

Third parties 5 entities

Entity Transfer Size Main thread Simulated
Google Fonts font 108 kB 0 ms
Cloudflare 10.3 kB 2 ms
namethathost.com 1.7 kB 3 ms
scarf.sh 305 B 0 ms
Sentry 95 B 0 ms
Total 121 kB 5 ms

Without JavaScript

The same load, photographed twice at 412×823: once with scripts disabled, once as rendered.

Scripts disabled
As rendered

41.8% of pixels differ — parts of the page change. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric Value Change / range Trend
Main Thread Work 4.62 s ↓ -225 ms (-4.6%) 3.25 s – 6.68 s
Long Tasks 12 ↓ -2 (-14.3%) 7 – 17
DOM Elements 1,062 → no change 781 – 1,072
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 59 → no change 23 – 59
A11y Failures 4 → no change 4 – 4
A11y Failing Nodes 13 → no change 8 – 13

Main thread work

Task Time Share Duration Simulated
style layout 30% 1.41 s
script evaluation 30% 1.39 s
other 26% 1.19 s
paint composite render 9% 418 ms
parse HTML 2% 107 ms
script parse compile 1% 66 ms
garbage collection 1% 48 ms
Total 4.62 s

Axe violations axe-core 4.13.0, full rule set

59 violating nodes across 5 rules, 1434 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • moderate region — All page content should be contained by landmarks 46 nodes
    Offending elements (5 of 46)
    1. a[aria-label="TanStack"] 
      <a aria-label="TanStack" class="inline-flex items-center cursor-pointer active" href="/" data-status="active" aria-current="page">
    2. h1 
      <h1 class="max-w-[613px] font-ds-display text-ds-display-sm font-bold text-ds-neutral-500 md:w-[47%] md:text-[clamp(2rem,4.3vw,4rem)] md:leading-[1.1] md:tracking-[-0.025em] xl:leading-[1.08]">
    3. .underline-offset-2 
      <a class="inline-flex items-ce..." href="#start-with-a-prompt">
    4. .md\:gap-3\.5.xl\:gap-4.text-text-primary:nth-child(1) > .md\:gap-3\.5.xl\:gap-4.min-w-0 > .md\:text-\[21px\].xl\:text-ds-heading-3.leading-none > .inline-grid.\[\&\>\*\]\:col-start-1.\[\&\>\*\]\:row-start-1 > span:nth-child(2) 
      <span>18.4B</span>
    5. .md\:gap-3\.5.xl\:gap-4.text-text-primary:nth-child(1) > .md\:gap-3\.5.xl\:gap-4.min-w-0 > .tracking-\[1\.75px\].md\:text-\[9\.5px\].md\:tracking-\[1\.5px\] 
      <span class="font-ds-mono font-medium uppercase tracking-[1.75px] md:text-[9.5px] md:tracking-[1.5px] xl:text-ds-mono-caps-xs xl:tracking-[1.75px] text-text-secondary">Total Downloads</span>
  • serious color-contrast — Elements must meet minimum color contrast ratio thresholds 10 nodes
    Offending elements (5 of 10)
    1. .left-6 
      <span aria-hidden="true" class="pointer-events-none absolute left-6 top-6 whitespace-nowrap text-base leading-6 text-gray-500 dark:text-[#8f8f98] home-prompt-ph-in">Blank starter</span>
    2. .font-extralight 
      <span class="font-ds-display text-sm font-extralight text-gray-500 dark:text-[#8f8f98]">Press Shift + Enter</span>
    3. .text-category-ui.text-ds-mono-caps 
      <p class="inline-flex items-center gap-2 font-ds-mono text-ds-mono-caps uppercase text-category-ui">Portable core</p>
    4. .text-ds-green-400 
      <p class="inline-flex items-center gap-2 font-ds-mono text-ds-mono-caps uppercase text-ds-green-400">Compile-time contracts</p>
    5. .text-ds-terracotta-400.text-ds-mono-caps 
      <p class="inline-flex items-center gap-2 font-ds-mono text-ds-mono-caps uppercase text-ds-terracotta-400">Real workloads</p>
  • critical button-name — Buttons must have discernible text 1 node
    Offending element
    1. #radix-\:R0 
      <button type="button" id="radix-:R0" aria-haspopup="menu" aria-expanded="false" data-state="closed" class=""><span style="position:fixed;left:0;top:0;width:1px;height:1px;"></span></button>
  • moderate heading-order — Heading levels should only increase by one 1 node
    Offending element
    1. .text-4xl 
      <h3 class="text-4xl font-[500] leading-[1.05] tracking-[-0.8px] sm:text-5xl lg:text-[64px]">Why TanStack?</h3>
  • critical label — Form elements must have labels 1 node
    Offending element
    1. textarea 
      <textarea rows="4" placeholder="" class="w-full min-h-28 bg-transparent outline-none transition-colors focus:ring-cyan-500 resize-none rounded-[36px] px-6 pb-6 pr-40 pt-6 text-base text-gray-900 plac…

Accessibility failures 4 of 26 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 10 nodes
  • button-name — Buttons do not have an accessible name 1 node
  • heading-order — Heading elements are not in a sequentially-descending order 1 node
  • label — Form elements do not have associated labels 1 node

Best Practices failures 1 of 18 audits

  • valid-source-maps — Missing source maps for large first-party JavaScript 2 items

SEO failures 1 of 10 audits

  • link-text — Links do not have descriptive text 2 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Field history 25 weeks

Weekly p75 from the CrUX History API, backfilled in a single request.

Week ending LCPINPCLSFCPTTFB
2026-10-03 3.79 s 294 ms 0.010 3.64 s 2.84 s
2026-09-26 3.80 s 323 ms 0.010 3.60 s 2.86 s
2026-09-19 3.87 s 352 ms 0.010 3.64 s 2.92 s
2026-09-12 3.85 s 378 ms 0.010 3.58 s 2.84 s
2026-09-05 3.73 s 379 ms 0.010 3.45 s 2.72 s
2026-08-29 3.76 s 385 ms 0.010 3.45 s 2.69 s
2026-08-22 3.61 s 386 ms 0.010 3.32 s 2.60 s
2026-08-15 3.59 s 389 ms 0.010 3.31 s 2.62 s
2026-08-08 3.59 s 373 ms 0.010 3.35 s 2.66 s
2026-08-01 3.50 s 341 ms 0.010 3.34 s 2.67 s
2026-07-25 3.70 s 318 ms 0 3.52 s 2.85 s
2026-07-18 3.72 s 294 ms 0 3.55 s 2.87 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 10, 2026, 11:44 PM UTC 62 5.82 s 0.034 296 ms 3.09 MB 3/3 ±5 2,452 -1% 122.8s Wayback
Oct 8, 2026, 10:57 PM UTC 59 6.01 s 0.034 381 ms 3.09 MB 3/3 ±19 2,357 -5% 128s Wayback
Oct 6, 2026, 6:51 PM UTC 56 9.53 s 0.034 304 ms 3.09 MB 3/3 ±17 3,877 +56% 116.1s Wayback
Oct 2, 2026, 11:01 PM UTC 57 6.01 s 0.034 390 ms 3.09 MB 3/3 ±9 2,463 -1% 125s Wayback
Sep 30, 2026, 3:42 PM UTC 48 9.04 s 0 615 ms 3.07 MB 3/3 ±6 2,500 +1% 118.6s Wayback
Sep 28, 2026, 10:45 AM UTC 51 7.52 s 0 554 ms 3.11 MB 3/3 ±4 2,502 +1% 110s Wayback
Sep 25, 2026, 12:33 AM UTC 53 8.17 s 0 402 ms 3.11 MB 3/3 ±2 2,405 -3% 125.4s Wayback
Sep 23, 2026, 12:01 AM UTC 59 6.04 s 0.034 353 ms 3.11 MB 3/3 ±17 3,029 +22% 116.8s Wayback
Sep 20, 2026, 11:03 PM UTC 48 8.39 s 0 546 ms 3.11 MB 3/3 ±5 2,489 0% 127s Wayback
Sep 18, 2026, 1:31 PM UTC 55 7.58 s 0 322 ms 3.11 MB 3/3 ±13 2,963 +19% 112.8s Wayback
Sep 16, 2026, 9:12 AM UTC 70 4.98 s 0.034 273 ms 3.11 MB 3/3 ±28 4,030 +62% 102.8s Wayback
Sep 14, 2026, 5:57 AM UTC 57 7.43 s 0.034 274 ms 3.11 MB 3/3 ±2 2,968 +19% 112.5s Wayback
Sep 11, 2026, 11:08 PM UTC 48 8.31 s 0 565 ms 3.10 MB 3/3 ±8 2,343 -6% 125.9s Wayback
Sep 9, 2026, 8:39 PM UTC 61 4.60 s 0.034 621 ms 3.09 MB 3/3 ±9 3,417 +37% 68.8s Wayback
Sep 7, 2026, 7:19 PM UTC 54 6.60 s 0.034 502 ms 3.10 MB 3/3 ±4 2,462 -1% 63.6s Wayback
Sep 5, 2026, 3:20 AM UTC 51 8.84 s 0 428 ms 3.10 MB 3/3 ±4 2,440 -2% 67.6s Wayback
Sep 4, 2026, 12:47 AM UTC 47 7.60 s 0 706 ms 3.10 MB 3/3 ±5 2,387 -4% 75.7s Wayback
Sep 2, 2026, 10:59 PM UTC 44 8.26 s 0 700 ms 3.10 MB 3/3 ±9 2,138 -14% 78.9s Wayback
Sep 1, 2026, 8:44 PM UTC 52 6.64 s 0.034 529 ms 3.10 MB 3/3 ±2 2,463 -1% 67.7s Wayback
Aug 31, 2026, 6:16 PM UTC 52 5.74 s 0.034 657 ms 3.09 MB 3/3 ±1 2,453 -1% 65.2s Wayback
Aug 26, 2026, 11:29 AM UTC 50 7.87 s 0 548 ms 3.08 MB 3/3 ±5 2,433 -2% 73.8s Wayback
Aug 25, 2026, 11:26 AM UTC 49 7.86 s 0 590 ms 3.08 MB 3/3 ±4 2,297 -8% 66.7s Wayback
Aug 24, 2026, 10:36 AM UTC 55 7.39 s 0 416 ms 3.07 MB 3/3 ±4 3,015 +21% 56s Wayback
Aug 23, 2026, 10:22 AM UTC 51 7.17 s 0 570 ms 3.07 MB 3/3 ±5 2,271 -9% 68.4s Wayback
Aug 22, 2026, 10:21 AM UTC 51 7.37 s 0 565 ms 3.07 MB 3/3 ±4 2,442 -2% 64.3s Wayback
Aug 21, 2026, 9:35 AM UTC 48 7.91 s 0 607 ms 3.07 MB 3/3 ±7 2,112 -15% 64.9s Wayback