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

traintimes.org.uk/btn/man/1000/2026-11-14

https://traintimes.org.uk/btn/man/1000/2026-11-14

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

Ranks Overall #3 traintimes.org.uk #3

Data from Oct 30, 2026, 10:09 PM UTC old Measured once a day · 1 run since Oct 30, 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

Self-hosted · nginx Hosted by Self-hosted
Rendered Probably at build time Same document on 5 loads

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 3.00 s. Compare this filmstrip against another site.

  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

Lighthouse Scores LAB Simulated

100
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
100
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 (2026-10-01 → 2026-10-28), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 833 ms good — 833 ms – 833 ms 1.42 s good 91.6% 5.3% 3.1%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 89 ms good 93.2% 5.2% 1.6%
CLS CWV Cumulative Layout Shift 0 good — 0 – 0 0 good 97.2% 2.8% 0.1%
TBT Total Blocking Time 0 ms good — 0 ms – 0 ms n/a —
FCP First Contentful Paint 833 ms good — 833 ms – 833 ms 1.34 s good 84.5% 10.2% 5.3%
Speed Index 2.80 s good — 2.80 s – 2.80 s n/a —
TTFB Time to First Byte 1.64 s needs work — 1.64 s – 1.64 s 1.17 s needs work 57.4% 29.8% 12.8%

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.

time to first byte 1.97 s
element render delay 92 ms

LCP LAB Simulated vs LCP FIELD

Lab 833 ms
Field p75 1.42 s

The lab LCP is 0.59× the field p75 — real users likely have below-average hardware or network connectivity. A gap this wide usually means real users are on slower devices or networks than the simulated ones — the lab number is flattering you.

Page weight

Metric Value Change / range Trend
Page Weight 19.2 kB — 19.2 kB – 19.2 kB
Requests 8 — 8 – 8
Third-party Weight 0 B — 0 B – 0 B
Third-party CPU 0 ms — 0 ms – 0 ms
Unused JS 0 B — 0 B – 0 B
Unused CSS 0 B — 0 B – 0 B

By resource type

Type Transfer Share Size Requests
other 49.9% 9.6 kB 3
document 18.6% 3.6 kB 1
stylesheet 14.1% 2.7 kB 1
script 11.7% 2.2 kB 2
image 5.7% 1.1 kB 1
Total 19.2 kB 8

Without JavaScript

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

Scripts disabled
As rendered

24% 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 287 ms — 287 ms – 287 ms
Long Tasks 0 — 0 – 0
DOM Elements 800 — 800 – 800
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 0 — 0 – 0
A11y Failures 0 — 0 – 0
A11y Failing Nodes 0 — 0 – 0

Main thread work

Task Time Share Duration Simulated
other 51% 146 ms
style layout 25% 72 ms
script evaluation 11% 32 ms
paint composite render 6% 18 ms
parse HTML 5% 14 ms
script parse compile 2% 5 ms
Total 287 ms

Axe violations axe-core 4.13.0, full rule set

0 violating nodes across 0 rules, 380 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

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-10-24 1.41 s 88 ms 0 1.34 s 1.16 s
2026-10-17 1.39 s 88 ms 0 1.32 s 1.14 s
2026-10-10 1.40 s 87 ms 0 1.33 s 1.16 s
2026-10-03 1.49 s 88 ms 0 1.41 s 1.25 s
2026-09-26 1.50 s 88 ms 0 1.43 s 1.27 s
2026-09-19 1.48 s 87 ms 0 1.40 s 1.25 s
2026-09-12 1.44 s 87 ms 0 1.37 s 1.22 s
2026-09-05 1.34 s 86 ms 0 1.28 s 1.11 s
2026-08-29 1.32 s 86 ms 0 1.26 s 1.09 s
2026-08-22 1.32 s 88 ms 0 1.26 s 1.07 s
2026-08-15 1.32 s 88 ms 0 1.26 s 1.07 s
2026-08-08 1.34 s 89 ms 0 1.27 s 1.08 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 30, 2026, 10:09 PM UTC 100 833 ms 0 0 ms 19.2 kB 3/3 ±0 2,075 0% 43.3s Wayback