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

zachleat.com/twitter

https://www.zachleat.com/twitter

100 100 100 92 ✓AXE ✓CWV

Ranks Overall #371 zachleat #12

Data from Sep 7, 2026, 3:04 PM UTC old Measured once a week · 5 runs since Aug 21, 2026

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

Stack

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Core Web Vitals field data, origin-level

Real Chrome users, 28-day window (2026-08-09 → 2026-09-05).

LCP 1.27 s good
INP — no data
CLS 0 good

Lighthouse Scores

100
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
92
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

8.2% of pixels differ — they are nearly identical. 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 1.59 s 1.59 s ↑ +5 ms (+0.3%) 1.23 s 1.59 s
CLS Cumulative Layout Shift 0.044 0.044 → no change 0.044 0.044
TBT Total Blocking Time 0 ms 0 ms → no change 0 ms 0 ms
FCP First Contentful Paint 836 ms 829 ms ↑ +7 ms (+0.8%) 829 ms 856 ms
Speed Index 836 ms 829 ms ↑ +7 ms (+0.8%) 829 ms 856 ms
TTFB Time to First Byte 608 ms 604 ms ↑ +4 ms (+0.7%) 604 ms 626 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 74 ms
time to first byte 9 ms

Field data Chrome UX Report, origin-level

Real Chrome users, 28-day trailing window (2026-08-09 → 2026-09-05).

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 1.27 s good 90.3% good
CLS CWV 0 good 98.8% good
FCP 1.11 s good 92.1% good
TTFB 831 ms needs-improvement 74.8% good

Lab LCP vs Field LCP

Lab 1.59 s
Field p75 1.27 s

The lab LCP is 1.25× the field p75 — real users likely have above-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 1.27 s — 0 1.11 s 831 ms
2026-08-29 1.19 s — 0 1.05 s 747 ms
2026-08-22 1.11 s — 0 1.04 s 693 ms
2026-08-15 1.08 s — 0 1.01 s 693 ms
2026-08-08 1.15 s — 0 1.08 s 703 ms
2026-08-01 1.09 s — 0 1.04 s 693 ms
2026-05-23 → 2026-07-25 No data — 10 weeks under the CrUX reporting threshold
2026-05-16 846 ms — 0 741 ms 557 ms
2026-04-11 → 2026-05-09 No data — 5 weeks under the CrUX reporting threshold
2026-04-04 1.19 s — 0 920 ms 616 ms
2026-03-28 1.09 s — 0 856 ms 575 ms
2026-03-21 1.19 s — 0 955 ms 693 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 845 kB 845 kB ↓ -6 B 190 kB 845 kB
Requests 19 19 → no change 19 23
Third-party Weight 4.8 kB 4.8 kB ↑ +3 B (+0.1%) 4.8 kB 4.8 kB
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

  • media 92.3% 779 kB · 2 req
  • image 4.6% 38.7 kB · 4 req
  • script 1.9% 15.9 kB · 3 req
  • document 0.7% 6.1 kB · 1 req
  • stylesheet 0.5% 4.5 kB · 2 req

Third parties 1 entities

4.8 kB transferred, 0 ms on the main thread.

11ty.dev image 4.8 kB · 0 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 518 ms 493 ms ↑ +24 ms (+4.9%) 439 ms 518 ms
Long Tasks 1 1 → no change 1 1
DOM Elements 547 547 → no change 547 547
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 0 → no change 0 0
A11y Failures 0 0 → no change 0 0
A11y Failing Nodes 0 0 → no change 0 0

Main thread work

other 192 ms
style layout 189 ms
paint composite render 82 ms
script evaluation 33 ms
parse HTML 17 ms
script parse compile 5 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 1278 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

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 7, 2026, 3:04 PM UTC 100 1.59 s 0.044 0 ms 845 kB 3/3 ±0 2,318 -7% 28.4s Wayback
Aug 31, 2026, 10:44 AM UTC 100 1.59 s 0.044 0 ms 845 kB 3/3 ±0 2,491 0% 27.4s Wayback
Aug 23, 2026, 6:27 PM UTC 100 1.23 s 0.044 0 ms 291 kB 3/3 ±8 2,451 -1% 30.9s Wayback
Aug 22, 2026, 5:19 PM UTC 100 1.56 s 0.044 0 ms 190 kB 3/3 ±3 3,362 +36% 29.5s Wayback
Aug 21, 2026, 4:33 PM UTC 100 1.23 s 0.044 0 ms 353 kB 3/3 ±29 2,641 +6% 29.8s Wayback

Embed this score

Use this web component to show zachleat.com/twitter'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://www.zachleat.com/twitter"></speedlify2-score>