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

npmjs.com

https://www.npmjs.com/

75PERF 100A11Y 100BEST 91SEO ✓AXE ✓CWV

Ranks Overall #523 Developer Tooling #8 Package Managers #3

Data from Oct 16, 2026, 5:42 AM UTC old Measured every 2 days · 23 runs since Aug 25, 2026

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

The measuring machine was faster than most in this project.

Lighthouse benchmark index was 3,752, 51% faster than this project's median of 2,487. CPU-bound metrics — TBT, TTI, main thread work — are affected by this and may have moved without the site changing at all.

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

Stack

Uses ReactReact
Cloudflare Hosted by Cloudflare

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 6.83 s. Compare this filmstrip against another site.

  1. 854 ms
  2. 1.71 s
  3. 2.56 s
  4. 3.26 s
  5. 4.27 s
  6. 5.12 s
  7. 5.97 s
  8. 6.83 s

Lighthouse Scores LAB Simulated

75
Performance
↑ +1 (+1.4%)
100
Accessibility
no change
100
Best Practices
↑ +4 (+4.2%)
91
SEO
no change

Metrics LAB FIELD

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

Field figures are the p75 across real Chrome users over a 28-day trailing window (2026-09-16 → 2026-10-13), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 5.63 s poor ↓ -325 ms (-5.5%) 5.63 s – 8.85 s 1.96 s good 84% 9% 7%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 112 ms good 87.1% 10.4% 2.5%
CLS CWV Cumulative Layout Shift 0 good ↓ -0.001 (-100%) significant 0 – 0.002 0.010 good 86.6% 9.6% 3.8%
TBT Total Blocking Time 74 ms good ↑ +3 ms (+4.2%) 71 ms – 375 ms n/a —
FCP First Contentful Paint 2.69 s needs work ↑ +10 ms (+0.4%) 2.62 s – 3.71 s 1.76 s good 75.4% 15.1% 9.5%
Speed Index 2.69 s good ↑ +10 ms (+0.4%) 2.62 s – 3.71 s n/a —
TTFB Time to First Byte 632 ms good ↓ -20 ms (-3.1%) 613 ms – 721 ms 1.03 s needs work 67.7% 22.5% 9.8%

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 4.32 s
resource load delay 2.59 s
time to first byte 617 ms
element render delay 26 ms

LCP LAB Simulated vs LCP FIELD

Lab 5.63 s
Field p75 1.96 s

The lab LCP is 2.87× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 1.20 MB ↓ -8.4 kB (-0.7%) 1.20 MB – 1.22 MB
Requests 21 ↓ -9 (-30%) significant 21 – 30
Third-party Weight 87.0 kB ↑ +544 B (+0.6%) 86.4 kB – 87.1 kB
Third-party CPU 0 ms → no change 0 ms – 0 ms
Unused JS 302 kB ↓ -66 B 301 kB – 302 kB
Unused CSS 51.7 kB ↓ -387 B (-0.7%) 51.5 kB – 52.3 kB

By resource type

Type Transfer Share Size Requests
script 45.8% 549 kB 3
image 40.4% 485 kB 2
font 7% 83.5 kB 8
stylesheet 5.8% 70.1 kB 5
document 0.9% 11.2 kB 1
other 0.1% 862 B 2
Total 1.20 MB 21

Third parties 1 entities

Entity Transfer Size Main thread Simulated
Google Fonts font 87.0 kB 0 ms
Total 87.0 kB 0 ms

Without JavaScript

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

Scripts disabled
As rendered

0% of pixels differ — they are identical. 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 4.96 s ↑ +4331 ms (+685.7%) significant 578 ms – 5.22 s
Long Tasks 2 → no change 2 – 5
DOM Elements 134 → no change 134 – 134
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 → no change 0 – 0
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 79% 3.94 s
other 8% 387 ms
garbage collection 7% 323 ms
script parse compile 3% 125 ms
style layout 2% 110 ms
parse HTML 1% 39 ms
paint composite render 1% 35 ms
Total 4.96 s

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 342 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

SEO failures 1 of 8 audits

  • meta-description — Document does not have a meta description

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-10-10 1.96 s 112 ms 0.010 1.76 s 1.03 s
2026-10-03 1.95 s 111 ms 0.010 1.75 s 1.04 s
2026-09-26 1.96 s 111 ms 0.010 1.76 s 1.05 s
2026-09-19 1.98 s 113 ms 0.010 1.78 s 1.07 s
2026-09-12 2.00 s 114 ms 0.010 1.80 s 1.08 s
2026-09-05 2.04 s 116 ms 0.010 1.83 s 1.09 s
2026-08-29 2.03 s 116 ms 0.010 1.81 s 1.09 s
2026-08-22 2.04 s 115 ms 0.010 1.82 s 1.07 s
2026-08-15 2.15 s 119 ms 0.010 1.98 s 1.16 s
2026-08-08 2.17 s 121 ms 0.010 1.98 s 1.16 s
2026-08-01 2.19 s 121 ms 0.010 2.00 s 1.16 s
2026-07-25 2.19 s 124 ms 0.010 1.99 s 1.16 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 16, 2026, 5:42 AM UTC 75 5.63 s 0 74 ms 1.20 MB 2/3 ±15 3,752 +51% 55.4s Wayback
Oct 14, 2026, 1:02 AM UTC 74 5.95 s 0.001 71 ms 1.21 MB 3/3 ±12 4,045 +63% 52s Wayback
Oct 9, 2026, 3:04 AM UTC 69 8.77 s 0.002 183 ms 1.22 MB 3/3 ±4 3,545 +43% 74s Wayback
Oct 6, 2026, 11:09 PM UTC 70 8.79 s 0.002 101 ms 1.20 MB 2/3 ±22 4,237 +70% 54.1s Wayback
Oct 3, 2026, 8:57 PM UTC 59 8.83 s 0.002 332 ms 1.22 MB 3/3 ±17 2,490 0% 53s Wayback
Oct 1, 2026, 2:15 PM UTC 65 8.03 s 0 246 ms 1.21 MB 2/3 ±0 2,440 -2% 49s Wayback
Sep 29, 2026, 11:11 AM UTC 65 8.02 s 0 229 ms 1.20 MB 2/3 ±11 2,413 -3% 52.6s Wayback
Sep 25, 2026, 12:50 AM UTC 63 8.24 s 0.002 253 ms 1.20 MB 3/3 ±5 2,498 0% 87.5s Wayback
Sep 23, 2026, 12:18 AM UTC 67 8.78 s 0.002 221 ms 1.21 MB 3/3 ±7 2,986 +20% 48.7s Wayback
Sep 20, 2026, 11:21 PM UTC 61 8.82 s 0.002 375 ms 1.20 MB 3/3 ±3 1,907 -23% 53.8s Wayback
Sep 18, 2026, 1:49 PM UTC 67 7.98 s 0.002 160 ms 1.21 MB 2/3 ±0 2,947 +18% 58.1s Wayback
Sep 16, 2026, 9:29 AM UTC 69 8.85 s 0.002 169 ms 1.21 MB 3/3 ±1 4,003 +61% 49.2s Wayback
Sep 14, 2026, 6:14 AM UTC 67 8.10 s 0.002 169 ms 1.20 MB 3/3 ±1 2,996 +20% 49.1s Wayback
Sep 11, 2026, 11:26 PM UTC 65 7.86 s 0.002 254 ms 1.20 MB 3/3 ±1 2,014 -19% 54.6s Wayback
Sep 9, 2026, 8:53 PM UTC 67 8.79 s 0.002 241 ms 1.21 MB 3/3 ±0 3,304 +33% 25.2s Wayback
Sep 7, 2026, 7:33 PM UTC 64 8.04 s 0.002 228 ms 1.21 MB 3/3 ±9 2,499 0% 26.6s Wayback
Sep 5, 2026, 3:34 AM UTC 65 8.82 s 0.002 309 ms 1.21 MB 3/3 ±11 2,654 +7% 25.5s Wayback
Sep 4, 2026, 1:01 AM UTC 61 8.84 s 0.002 337 ms 1.21 MB 3/3 ±0 2,316 -7% 26.6s Wayback
Sep 2, 2026, 11:13 PM UTC 65 8.08 s 0.002 293 ms 1.21 MB 3/3 ±6 2,336 -6% 28.2s Wayback
Sep 1, 2026, 8:57 PM UTC 67 7.96 s 0.002 217 ms 1.20 MB 3/3 ±6 2,480 0% 24.9s Wayback
Aug 31, 2026, 6:30 PM UTC 64 8.03 s 0.002 230 ms 1.21 MB 3/3 ±1 2,509 +1% 26.9s Wayback
Aug 26, 2026, 7:03 PM UTC 65 8.78 s 0.002 234 ms 1.21 MB 3/3 ±3 2,988 +20% 24.8s Wayback
Aug 25, 2026, 4:36 PM UTC 64 8.06 s 0.002 252 ms 1.21 MB 3/3 ±8 2,294 -8% 27s Wayback