speedlify2

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

Charts Measurement runs Embed a score

v8.dev

https://v8.dev/

100 100 100 100 !AXE ✓CWV

Ranks Overall #534 Built Awesome #435

Data from Sep 6, 2026, 6:52 PM UTC old Measured once a week · 3 runs since Aug 21, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Wayback Machine

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-08-08 → 2026-09-04).

LCP 985 ms good
INP 85 ms good
CLS 0 good

Lighthouse Scores

100
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
SEO
no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 3.00 s.

  1. 375 ms
  2. 750 ms
  3. 1.13 s
  4. 1.50 s
  5. 1.88 s
  6. 2.25 s
  7. 2.63 s
  8. 3.00 s

Without JavaScript

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

Scripts disabled
As rendered

62.1% of pixels differ — the page changes substantially. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 774 ms 786 ms ↓ -12 ms (-1.5%) 769 ms 786 ms
CLS Cumulative Layout Shift 0 0 → no change 0 0
TBT Total Blocking Time 0 ms 0 ms → no change 0 ms 0 ms
FCP First Contentful Paint 774 ms 786 ms ↓ -12 ms (-1.5%) 769 ms 786 ms
Speed Index 774 ms 786 ms ↓ -12 ms (-1.5%) 769 ms 786 ms
TTFB Time to First Byte 604 ms 619 ms ↓ -15 ms (-2.4%) 602 ms 619 ms

LCP Subparts lab observed, unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab metrics LCP metric shown above is throttled.

element render delay 54 ms
time to first byte 8 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-08-08 → 2026-09-04).

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 985 ms good 95.2% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 85 ms good 90.4% good
CLS CWV 0 good 93.7% good
FCP 1.00 s good 90.9% good
TTFB 649 ms good 79.5% good

Lab LCP vs Field LCP

Lab 774 ms
Field p75 985 ms

The lab LCP is 0.79× the field p75 — real users likely have below-average hardware or network connectivity.

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-05 1.00 s 89 ms 0 1.01 s 651 ms
2026-08-29 981 ms 79 ms 0 984 ms 653 ms
2026-08-22 964 ms 82 ms 0 982 ms 685 ms
2026-08-15 970 ms 82 ms 0 977 ms 648 ms
2026-08-08 937 ms 82 ms 0 936 ms 630 ms
2026-08-01 893 ms 87 ms 0 898 ms 572 ms
2026-07-25 893 ms 84 ms 0 896 ms 573 ms
2026-07-18 887 ms 84 ms 0 896 ms 582 ms
2026-07-11 859 ms 84 ms 0 880 ms 558 ms
2026-07-04 872 ms 79 ms 0 900 ms 603 ms
2026-06-27 861 ms 77 ms 0 871 ms 585 ms
2026-06-20 851 ms 74 ms 0 866 ms 570 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 17.3 kB 17.0 kB ↑ +288 B (+1.7%) 17.0 kB 17.3 kB
Requests 9 9 → no change 9 9
Third-party Weight 0 B 0 B → no change 0 B 0 B
Third-party CPU 0 ms 0 ms → no change 0 ms 0 ms
Unused JS 0 B 0 B → no change 0 B 0 B
Unused CSS 0 B 0 B → no change 0 B 0 B

By resource type

  • other 45.1% 7.8 kB · 3 req
  • script 17.4% 3.0 kB · 2 req
  • stylesheet 17.4% 3.0 kB · 1 req
  • image 11.3% 1.9 kB · 2 req
  • document 8.8% 1.5 kB · 1 req

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 221 ms 241 ms ↓ -21 ms (-8.6%) 175 ms 241 ms
Long Tasks 0 0 → no change 0 0
DOM Elements 103 103 → no change 103 103
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 1 1 → no change 1 1
A11y Failures 0 0 → no change 0 0
A11y Failing Nodes 0 0 → no change 0 0

Main thread work

other 121 ms
script evaluation 38 ms
style layout 34 ms
paint composite render 10 ms
parse HTML 9 ms
script parse compile 8 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 215 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • minor empty-heading — Headings should not be empty 1 node

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 6, 2026, 6:52 PM UTC 100 774 ms 0 0 ms 17.3 kB 3/3 ±0 2,292 -8% 21.3s Wayback
Aug 30, 2026, 5:56 PM UTC 100 786 ms 0 0 ms 17.0 kB 3/3 ±0 2,328 -6% 20.1s Wayback
Aug 21, 2026, 10:29 AM UTC 100 769 ms 0 0 ms 17.3 kB 3/3 ±0 2,471 0% 20.1s Wayback

Embed this score

Use this web component to show v8.dev's scores on any website, updated whenever this instance re-measures. Don’t forget to bundle the speedlify2-score.js component code into your site! 

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://v8.dev/"></speedlify2-score>