speedlify2

Lighthouse lab metrics and Chrome UX Report field data for a list of sites, recorded on every run and compared over time.

Measurement runs · Embed a score · Field data from the Chrome UX Report ·

jhey.dev

https://www.jhey.dev/

94 92 96 100 ✓CWV 19AXE

Data from Aug 21, 2026, 12:47 PM UTC — 6h old.

11ty Emeritus · 1 measurement · since Aug 21, 2026 · last attempt 6h

Stack

Detected on the same page load as the accessibility pass — the generator from <meta name="generator"> or the shape of the page, the host from response headers.

Astro Built with Astro
Vercel Hosted by Vercel

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-07-23 → 2026-08-19). This is what Google measures you on.

LCP — no data
INP — no data
CLS 0 good

Scores

94
Performance
no change
92
Accessibility
no change
96
Best Practices
no change
100
SEO
no change

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 3.02 s — — 3.02 s 3.02 s
CLS Cumulative Layout Shift 0 — — 0 0
TBT Total Blocking Time 0 ms — — 0 ms 0 ms
FCP First Contentful Paint 920 ms — — 920 ms 920 ms
Speed Index 1.41 s — — 1.41 s 1.41 s
TTFB Time to First Byte 620 ms — — 620 ms 620 ms

What LCP is made of

A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.

element render delay 1.57 s
time to first byte 10 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-07-23 → 2026-08-19). This is what Google measures you on.

Metric p75 Rating Distribution (good / needs work / poor)
CLS CWV 0 good 99.2% good
FCP 1.46 s good 82.9% good
TTFB 941 ms needs-improvement 67.4% good

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-08-15 — — 0 1.46 s 993 ms
2026-08-08 — — 0 1.49 s 997 ms
2026-08-01 — — 0 1.46 s 997 ms
2026-07-25 — — 0 1.49 s 1.05 s
2026-07-18 — — 0 1.49 s 997 ms
2026-07-11 — — 0 1.53 s 1.11 s
2026-07-04 — — 0 1.64 s 1.16 s
2026-06-27 — — 0 1.69 s 1.20 s
2026-06-20 3.29 s — 0 1.64 s 1.16 s
2026-06-13 3.04 s 78 ms 0 1.50 s 1.09 s
2026-06-06 2.67 s 78 ms 0 1.50 s 1.02 s
2026-05-30 2.64 s 78 ms 0 1.50 s 1.07 s

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 318.4 kB — — 318.4 kB 318.4 kB
Requests 30 — — 30 30
Third-party Weight 2.6 kB — — 2.6 kB 2.6 kB
Third-party CPU 0 ms — — 0 ms 0 ms
Unused JS 0 B — — 0 B 0 B
Unused CSS 0 B — — 0 B 0 B

By resource type

font 254.9 kB · 20 req
script 33.2 kB · 2 req
other 11.8 kB · 5 req
document 8.4 kB · 1 req
stylesheet 7.5 kB · 1 req
image 2.6 kB · 1 req
third party 2.6 kB · 1 req

Third parties 1 entities

2.6 kB transferred, 0 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

weatherapi.com 2.6 kB · 0 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 959 ms — — 959 ms 959 ms
Long Tasks 1 — — 1 1
DOM Elements 92 — — 92 92
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 19 — — 19 19
A11y Failures 2 — — 2 2
A11y Failing Nodes 19 — — 19 19

Main thread work

other 380 ms
style layout 208 ms
script evaluation 160 ms
paint composite render 100 ms
parse HTML 93 ms
script parse compile 17 ms

Axe violations axe-core 4.13.0, full rule set

19 violating nodes across 2 rules, 185 passing. This is a standalone axe run, stricter than the subset Lighthouse folds into its score above — and it is the second tiebreaker in the ranking.

  • serious color-contrast — Elements must meet minimum color contrast ratio thresholds 11 nodes
  • serious link-in-text-block — Links must be distinguishable without relying on color 8 nodes

Accessibility failures 2 of 24 audits

Tracked as a count, not just the score — the weighted score is coarse enough that you can ship a broken component and barely move it.

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 11 nodes
  • link-in-text-block — Links rely on color to be distinguishable. 8 nodes

Hygiene

Changes rarely — which is exactly why a change is worth noticing.

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 1 console error

Measurement log

Every stored run for this URL, newest first. Failures are kept as records — "this site was down on Tuesday" is data too.

When PerfLCPCLSTBTWeight RunsSpreadBenchTook
Aug 21, 2026, 12:47 PM UTC 94 3.02 s 0 0 ms 318.4 kB 3/3 ±0 2,483 24.4s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show jhey.dev's scores, updated whenever this instance re-measures — more about the component. Don’t forget to bundle the speedlify-score.js component code into your site! 

<speedlify-score speedlify-url="https://zachleat.github.io/speedlify2/" url="https://www.jhey.dev/"></speedlify-score>