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

openai.com

https://openai.com/

30 100 100 100 AXE !CWV

Data from Aug 31, 2026, 9:07 PM UTC old

Overall #1,144 AI #2 Developer Tooling #40 · 1 measurement · since Aug 31, 2026

Stack

Next.js Built with Next.js
Vercel Hosted by Vercel

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-08-02 → 2026-08-29).

LCP 3.15 s needs-improvement
INP 461 ms needs-improvement
CLS 0 good

Lighthouse Scores

30
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 43.74 s.

  1. 5.47 s
  2. 10.94 s
  3. 16.40 s
  4. 21.87 s
  5. 27.34 s
  6. 32.81 s
  7. 38.28 s
  8. 43.74 s

Without JavaScript

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

Scripts disabled
As rendered

0.1% 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 66.32 s 66.32 s 66.32 s
CLS Cumulative Layout Shift 0 0 0
TBT Total Blocking Time 1.97 s 1.97 s 1.97 s
FCP First Contentful Paint 4.04 s 4.04 s 4.04 s
Speed Index 12.93 s 12.93 s 12.93 s
TTFB Time to First Byte 736 ms 736 ms 736 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 1.66 s
resource load duration 495 ms
time to first byte 238 ms
resource load delay 26 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-08-02 → 2026-08-29).

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 3.15 s needs-improvement 64.2% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 461 ms needs-improvement 55.7% good
CLS CWV 0 good 98.9% good
FCP 2.45 s needs-improvement 61.5% good
TTFB 1.12 s needs-improvement 62.6% good

Lab LCP vs Field LCP

Lab 66.32 s
Field p75 3.15 s

The lab LCP is 21.05× 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
2026-08-29 3.15 s 461 ms 0 2.45 s 1.12 s
2026-08-22 3.17 s 481 ms 0 2.46 s 1.10 s
2026-08-15 3.14 s 500 ms 0 2.43 s 1.03 s
2026-08-08 3.16 s 505 ms 0 2.45 s 1.06 s
2026-08-01 3.09 s 501 ms 0 2.46 s 1.11 s
2026-07-25 2.92 s 493 ms 0 2.41 s 1.12 s
2026-07-18 2.80 s 473 ms 0 2.39 s 1.14 s
2026-07-11 2.65 s 446 ms 0 2.33 s 1.12 s
2026-07-04 2.60 s 432 ms 0 2.29 s 1.10 s
2026-06-27 2.66 s 426 ms 0 2.32 s 1.11 s
2026-06-20 2.68 s 410 ms 0 2.31 s 1.11 s
2026-06-13 2.71 s 397 ms 0 2.32 s 1.10 s

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 16.68 MB 16.68 MB 16.68 MB
Requests 187 187 187
Third-party Weight 193 kB 193 kB 193 kB
Third-party CPU 20 ms 20 ms 20 ms
Unused JS 2.45 MB 2.45 MB 2.45 MB
Unused CSS 33.4 kB 33.4 kB 33.4 kB

By resource type

  • image 51% 8.51 MB · 8 req
  • media 23.8% 3.96 MB · 4 req
  • script 22.2% 3.70 MB · 95 req
  • stylesheet 1% 170 kB · 27 req
  • font 1% 167 kB · 3 req
  • other 0.8% 134 kB · 49 req
  • document 0.3% 44.1 kB · 1 req

Third parties 5 entities

193 kB transferred, 20 ms on the main thread.

ctfassets.net image 155 kB · 0 ms CPU
reddit 20.2 kB · 9 ms CPU
Cloudflare 9.6 kB · 11 ms CPU
chatgpt.com 8.4 kB · 0 ms CPU
cloudflareinsights.com 36 B · 0 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 7.67 s 7.67 s 7.67 s
Long Tasks 20 20 20
DOM Elements 805 805 805
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 0 0
A11y Failures 1 1 1
A11y Failing Nodes 20 20 20

Main thread work

script evaluation 3.31 s
other 2.05 s
script parse compile 1.03 s
style layout 745 ms
garbage collection 211 ms
paint composite render 160 ms
parse HTML 154 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 1614 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Accessibility failures 1 of 28 audits

  • label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 20 nodes

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Every stored run for this URL, newest first.

When PerfLCPCLSTBTWeight RunsSpreadBenchTook
Aug 31, 2026, 9:07 PM UTC 30 66.32 s 0 1.97 s 16.68 MB 3/3 ±1 2,468 0% 207s