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

devin.ai

https://devin.ai/

65 89 77 100 !AXE ✓CWV

Data from Sep 1, 2026, 1:40 AM UTC old

Overall #985 AI #1 Developer Tooling #31 · 3 measurements · since Aug 31, 2026

Stack

Vercel Hosted by Vercel

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-08-03 → 2026-08-30).

LCP 2.28 s good
INP 162 ms good
CLS 0 good

Lighthouse Scores

65
Performance
↓ -6 (-8.5%)
89
Accessibility
no change
77
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

0.9% 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 4.22 s 3.93 s ↑ +284 ms (+7.2%) 3.93 s 4.22 s
CLS Cumulative Layout Shift 0 0 → no change 0 0
TBT Total Blocking Time 893 ms 617 ms ↑ +276 ms (+44.7%) 617 ms 893 ms
FCP First Contentful Paint 1.67 s 1.68 s ↓ -16 ms (-1%) 1.67 s 1.68 s
Speed Index 1.67 s 1.68 s ↓ -16 ms (-1%) 1.67 s 1.68 s
TTFB Time to First Byte 618 ms 634 ms ↓ -16 ms (-2.5%) 618 ms 634 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 53 ms
resource load delay 50 ms
resource load duration 36 ms
time to first byte 4 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-08-03 → 2026-08-30).

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 2.28 s good 77.8% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 162 ms good 83.7% good
CLS CWV 0 good 97.1% good
FCP 2.12 s needs-improvement 69% good
TTFB 505 ms good 86.3% good

Lab LCP vs Field LCP

Lab 4.22 s
Field p75 2.28 s

The lab LCP is 1.85× 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 2.36 s 163 ms 0 2.19 s 506 ms
2026-08-22 2.86 s 165 ms 0 2.67 s 512 ms
2026-08-15 3.24 s 167 ms 0 3.03 s 509 ms
2026-08-08 3.27 s 166 ms 0 3.02 s 505 ms
2026-08-01 3.28 s 164 ms 0 3.03 s 506 ms
2026-07-25 3.29 s 164 ms 0 3.04 s 504 ms
2026-07-18 3.28 s 162 ms 0 3.05 s 504 ms
2026-07-11 3.32 s 154 ms 0 3.12 s 512 ms
2026-07-04 3.24 s 148 ms 0 3.06 s 500 ms
2026-06-27 3.21 s 141 ms 0 3.03 s 492 ms
2026-06-20 3.18 s 139 ms 0 3.01 s 480 ms
2026-06-13 3.13 s 144 ms 0 2.97 s 474 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 1.88 MB 1.88 MB ↑ +959 B (+0.1%) 1.88 MB 2.05 MB
Requests 71 71 → no change 71 72
Third-party Weight 839 kB 839 kB ↓ -5 B 839 kB 1.01 MB
Third-party CPU 391 ms 330 ms ↑ +61 ms (+18.5%) 330 ms 399 ms
Unused JS 396 kB 393 kB ↑ +2.5 kB (+0.7%) 393 kB 516 kB
Unused CSS 0 B 0 B → no change 0 B 0 B

By resource type

  • script 62.6% 1.18 MB · 31 req
  • image 15.5% 291 kB · 19 req
  • font 12.8% 240 kB · 6 req
  • document 6.2% 117 kB · 1 req
  • stylesheet 1.8% 34.4 kB · 2 req
  • other 1.1% 20.8 kB · 12 req

Third parties 10 entities

839 kB transferred, 391 ms on the main thread.

Google Tag Manager script 527 kB · 233 ms CPU
Facebook script 177 kB · 91 ms CPU
LinkedIn Ads 43.0 kB · 13 ms CPU
reddit 41.5 kB · 41 ms CPU
unifyintent.com 31.1 kB · 5 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 3.34 s 2.89 s ↑ +452 ms (+15.6%) 2.89 s 3.34 s
Long Tasks 12 12 → no change 12 13
DOM Elements 1,164 1,164 → no change 1,164 1,164
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 1 — — 1 1
A11y Failures 3 3 → no change 3 3
A11y Failing Nodes 3 3 → no change 3 3

Main thread work

script evaluation 2.17 s
other 520 ms
script parse compile 419 ms
style layout 96 ms
parse HTML 60 ms
garbage collection 44 ms
paint composite render 34 ms

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 39 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • moderate page-has-heading-one — Page should contain a level-one heading 1 node

Accessibility failures 3 of 24 audits

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 1 node
  • heading-order — Heading elements are not in a sequentially-descending order 1 node
  • meta-viewport — `[user-scalable="no"]` is used in the `<meta name="viewport">` element or the `[maximum-scale]` attribute is less than 5. 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 PerfLCPCLSTBTWeight RunsSpreadBenchTook
Sep 1, 2026, 1:40 AM UTC 65 4.22 s 0 893 ms 1.88 MB 2/3 ±1 2,465 0% 37.9s
Aug 31, 2026, 10:19 PM UTC 71 3.93 s 0 617 ms 1.88 MB 2/3 ±0 2,956 +19% 30.6s
Aug 31, 2026, 9:00 PM UTC 66 4.07 s 0 861 ms 2.05 MB 2/3 ±0 2,416 -2% 38s