speedlify2

Lighthouse lab metrics, Axe, and Chrome UX Report field data for a list of sites recorded and compared over time. Follow us on Mastodon or Bluesky.

Charts Compare Measurement runs Embed a score Open to Work

webflow.com

https://webflow.com/

27PERF 100A11Y 73BEST 100SEO ✓AXE ✗CWV

Ranks Overall #1,721 Website Builders #8

Data from Oct 9, 2026, 2:56 AM UTC old Measured every 2 days · 21 runs since Aug 25, 2026

Elsewhere: PageSpeed Insights · Calibre · Treo · CrUX Vis · Tame the Bots · Scoring Calculator · Wayback Machine

Lab data is measured using Lighthouse, Mobile mode unless otherwise specified. Field data is reported from Chrome UX Report (using p75 measurements).

Stack

Webflow Built with Webflow

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 28.73 s. Compare this filmstrip against another site.

  1. 3.59 s
  2. 3.97 s
  3. 10.78 s
  4. 14.37 s
  5. 17.96 s
  6. 21.55 s
  7. 25.14 s
  8. 28.73 s

Lighthouse Scores LAB Simulated

27
Performance
↓ -4 (-12.9%)
100
Accessibility
no change
73
Best Practices
no change
100
SEO
no change

Metrics LAB FIELD

Core Web Vitals: failing 3 of 3 assessed from real Chrome users.

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-09 → 2026-10-06), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 33.84 s poor ↑ +24570 ms (+265.2%) significant 8.32 s – 35.72 s 5.02 s poor 43.1% 21.6% 35.2%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 353 ms needs work 54.5% 30.3% 15.2%
CLS CWV Cumulative Layout Shift 0 good ↓ -0.002 (-100%) significant 0 – 0.002 0 good 89.6% 9% 1.4%
TBT Total Blocking Time 2.58 s poor ↓ -1415 ms (-35.4%) 1.10 s – 4.00 s n/a —
FCP First Contentful Paint 7.91 s poor ↑ +3965 ms (+100.5%) significant 3.53 s – 9.50 s 4.49 s poor 36.8% 20.2% 43%
Speed Index 12.02 s poor ↑ +4632 ms (+62.7%) significant 6.12 s – 12.24 s n/a —
TTFB Time to First Byte 674 ms good ↑ +2 ms (+0.3%) 613 ms – 682 ms 2.21 s poor 47.3% 23.5% 29.3%

LCP Subparts LAB Throttled

The subparts attribute LCP to your server, resource discovery, download, or rendering. They come from one throttled load, the same one as the filmstrip, so they add up to that load’s LCP rather than the simulated Lab LCP above.

resource load duration 8.25 s
resource load delay 1.70 s
time to first byte 631 ms
element render delay 10 ms

LCP LAB Simulated vs LCP FIELD

Lab 33.84 s
Field p75 5.02 s

The lab LCP is 6.74× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 6.99 MB ↓ -313.0 kB (-4.4%) 3.30 MB – 7.34 MB
Requests 256 ↑ +1 (+0.4%) 182 – 259
Third-party Weight 6.65 MB ↓ -312.9 kB (-4.6%) 3.15 MB – 7.00 MB
Third-party CPU 1.40 s ↓ -747 ms (-34.7%) significant 691 ms – 2.15 s
Unused JS 1.23 MB ↑ +716 B (+0.1%) 627 kB – 1.23 MB
Unused CSS 33.2 kB ↓ -21 B (-0.1%) 22.9 kB – 33.4 kB

By resource type

Type Transfer Share Size Requests
image 57.5% 4.02 MB 108
script 34.6% 2.42 MB 81
font 3.6% 249 kB 4
document 2.4% 166 kB 5
stylesheet 1.4% 94.4 kB 11
other 0.6% 42.8 kB 46
Total 6.99 MB 256

Third parties 30 entities

Entity Transfer Size Main thread Simulated
website-files.com image 4.42 MB 86 ms
Google Tag Manager 544 kB 390 ms
Google CDN 361 kB 260 ms
Facebook 275 kB 168 ms
transcend-cdn.com 163 kB 97 ms
All 30 6.65 MB 1.40 s

Without JavaScript

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

Scripts disabled
As rendered

17% of pixels differ — parts of the page change. A shifted layout counts as difference, so a <noscript> banner alone can account for a large figure.

Page health

Metric Value Change / range Trend
Main Thread Work 14.23 s ↓ -4720 ms (-24.9%) 6.79 s – 18.95 s
Long Tasks 20 → no change 17 – 20
DOM Elements 3,228 ↑ +2 (+0.1%) 3,062 – 3,894
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 1
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

Task Time Share Duration Simulated
script evaluation 48% 6.88 s
style layout 24% 3.44 s
other 15% 2.18 s
script parse compile 8% 1.09 s
parse HTML 2% 221 ms
paint composite render 2% 216 ms
garbage collection 1% 203 ms
Total 14.23 s

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 2558 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

Best Practices failures 3 of 19 audits

  • third-party-cookies — Uses third-party cookies 16 items
  • errors-in-console — Browser errors were logged to the console 7 items
  • inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 3 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 7 console errors

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-10-03 5.03 s 346 ms 0 4.45 s 2.13 s
2026-09-26 5.06 s 333 ms 0 4.51 s 2.03 s
2026-09-19 5.13 s 342 ms 0 4.50 s 1.94 s
2026-09-12 5.13 s 348 ms 0 4.51 s 1.89 s
2026-09-05 5.00 s 345 ms 0 4.43 s 1.80 s
2026-08-29 5.07 s 353 ms 0 4.43 s 1.77 s
2026-08-22 5.06 s 349 ms 0 4.42 s 1.76 s
2026-08-15 5.01 s 351 ms 0 4.39 s 1.72 s
2026-08-08 4.99 s 366 ms 0 4.36 s 1.68 s
2026-08-01 4.95 s 373 ms 0 4.32 s 1.65 s
2026-07-25 5.00 s 382 ms 0 4.36 s 1.63 s
2026-07-18 5.11 s 393 ms 0 4.48 s 1.63 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 9, 2026, 2:56 AM UTC 27 33.84 s 0 2.58 s 6.99 MB 3/3 ±5 2,538 +2% 144.2s Wayback
Oct 7, 2026, 2:07 AM UTC 31 9.27 s 0.002 4.00 s 7.31 MB 3/3 ±5 2,307 -7% 150.4s Wayback
Oct 3, 2026, 8:54 PM UTC 29 16.68 s 0.002 3.80 s 7.34 MB 3/3 ±4 2,746 +10% 139s Wayback
Sep 30, 2026, 3:41 PM UTC 29 33.62 s 0 1.52 s 6.95 MB 3/3 ±3 3,070 +23% 132.1s Wayback
Sep 28, 2026, 10:39 AM UTC 26 35.72 s 0 3.27 s 6.91 MB 3/3 ±1 2,583 +4% 147.6s Wayback
Sep 25, 2026, 6:04 AM UTC 28 32.47 s 0 2.13 s 6.55 MB 3/3 ±1 3,016 +21% 132.3s Wayback
Sep 23, 2026, 12:14 AM UTC 32 16.44 s 0.002 1.99 s 6.59 MB 3/3 ±4 3,093 +24% 129.9s Wayback
Sep 20, 2026, 11:19 PM UTC 31 9.74 s 0.002 3.13 s 6.60 MB 3/3 ±4 2,489 0% 145.2s Wayback
Sep 18, 2026, 1:34 PM UTC 32 9.73 s 0.002 2.33 s 6.58 MB 3/3 ±4 2,997 +21% 140.6s Wayback
Sep 16, 2026, 3:46 AM UTC 28 26.52 s 0.002 3.32 s 6.61 MB 3/3 ±2 2,496 0% 156.5s Wayback
Sep 14, 2026, 12:58 AM UTC 32 17.28 s 0.002 1.94 s 6.64 MB 3/3 ±4 3,976 +60% 121s Wayback
Sep 11, 2026, 8:50 PM UTC 32 17.43 s 0.001 3.15 s 6.61 MB 3/3 ±4 2,489 0% 275.1s Wayback
Sep 9, 2026, 5:45 PM UTC 26 33.10 s 0 3.02 s 6.84 MB 3/3 ±3 2,484 0% 83.1s Wayback
Sep 7, 2026, 3:04 PM UTC 31 17.87 s 0.002 3.27 s 6.67 MB 3/3 ±2 2,328 -6% 87.3s Wayback
Sep 5, 2026, 3:29 AM UTC 31 23.23 s 0.002 2.90 s 6.63 MB 3/3 ±3 2,918 +17% 177.6s Wayback
Sep 4, 2026, 1:07 AM UTC 32 18.93 s 0 1.79 s 6.66 MB 3/3 ±5 3,403 +37% 66.5s Wayback
Sep 2, 2026, 11:14 PM UTC 30 19.44 s 0.002 3.01 s 6.69 MB 3/3 ±5 2,808 +13% 73.7s Wayback
Sep 1, 2026, 8:52 PM UTC 33 24.97 s 0 1.10 s 3.30 MB 3/3 ±0 3,449 +39% 54.1s Wayback
Aug 31, 2026, 6:08 PM UTC 34 8.32 s 0 1.92 s 3.51 MB 3/3 ±2 2,342 -6% 67.6s Wayback
Aug 26, 2026, 2:03 PM UTC 29 22.69 s 0 1.95 s 3.30 MB 3/3 ±3 2,617 +5% 66.1s Wayback
Aug 25, 2026, 1:50 PM UTC 31 24.93 s 0 1.43 s 3.50 MB 3/3 ±3 3,196 +29% 59.6s Wayback