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

aws.amazon.com/amplify

https://aws.amazon.com/amplify

28PERF 100A11Y 92BEST 92SEO !AXE ✗CWV

Ranks Overall #1,725 Developer Tooling #84 Web Hosts #18

Data from Oct 8, 2026, 10:08 AM UTC old Measured every 2 days · 26 runs since Aug 20, 2026

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

This URL redirects to https://aws.amazon.com/amplify/.

The same URL in a different form — a trailing slash — so both are treated as one site rather than two: one history, measured once. Lighthouse follows the redirect, so the numbers below describe the page actually served; the only cost is an extra hop on each run.

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
Se Hosted by Server

Filmstrip LAB Throttled

How the page drew during the measured load, at 8 points across 15.68 s. Compare this filmstrip against another site.

  1. 1.96 s
  2. 3.92 s
  3. 5.88 s
  4. 7.84 s
  5. 8.54 s
  6. 11.76 s
  7. 13.72 s
  8. 15.68 s

Lighthouse Scores LAB Simulated

28
Performance
↓ -5 (-15.2%)
100
Accessibility
no change
92
Best Practices
no change
92
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), origin-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 44.68 s poor ↓ -823 ms (-1.8%) 21.75 s – 51.70 s 4.47 s poor 44.8% 25% 30.2%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 347 ms needs work 58.2% 26% 15.8%
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0 0 good 94.3% 3.8% 1.9%
TBT Total Blocking Time 1.89 s poor ↑ +866 ms (+84.3%) significant 1.03 s – 2.28 s n/a —
FCP First Contentful Paint 15.23 s poor ↓ -1083 ms (-6.6%) 6.73 s – 24.37 s 4.06 s poor 33.7% 26% 40.3%
Speed Index 18.18 s poor ↓ -1509 ms (-7.7%) 15.75 s – 24.37 s n/a —
TTFB Time to First Byte 631 ms good ↓ -19 ms (-2.9%) 626 ms – 688 ms 1.41 s needs work 45.3% 39.7% 15%

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.

element render delay 7.36 s
time to first byte 1.17 s

LCP LAB Simulated vs LCP FIELD

Lab 44.68 s
Field p75 4.47 s

The lab LCP is 9.98× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 11.87 MB ↑ +248.8 kB (+2.2%) 11.33 MB – 11.87 MB
Requests 157 → no change 153 – 170
Third-party Weight 10.59 MB ↑ +243.3 kB (+2.4%) 10.06 MB – 10.59 MB
Third-party CPU 722 ms ↑ +276 ms (+61.9%) significant 415 ms – 837 ms
Unused JS 2.00 MB ↓ -258.9 kB (-11.7%) significant 1.88 MB – 2.35 MB
Unused CSS 454 kB ↑ +18.8 kB (+4.4%) 316 kB – 465 kB

By resource type

Type Transfer Share Size Requests
script 57.2% 6.70 MB 54
image 35.5% 4.16 MB 31
stylesheet 3.3% 390 kB 15
font 2.3% 269 kB 5
document 1% 116 kB 2
media 0.4% 48.4 kB 1
other 0.3% 36.0 kB 41
Total 11.87 MB 157

Third parties 5 entities

Entity Transfer Size Main thread Simulated
awsstatic.com scriptimage 8.90 MB 407 ms
aws.dev script 1.69 MB 315 ms
Adobe Experience Cloud 3.4 kB 0 ms
api.aws 955 B 0 ms
clrt.ai 255 B 0 ms
Total 10.59 MB 722 ms

Without JavaScript

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

Scripts disabled
As rendered

25.9% 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 10.24 s ↑ +4032 ms (+65%) significant 6.21 s – 12.13 s
Long Tasks 20 ↑ +6 (+42.9%) significant 14 – 20
DOM Elements 1,922 ↑ +179 (+10.3%) significant 1,743 – 2,401
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 1 → no change 1 – 5
A11y Failures 0 → no change 0 – 2
A11y Failing Nodes 0 → no change 0 – 2

Main thread work

Task Time Share Duration Simulated
script evaluation 47% 4.85 s
other 29% 3.00 s
script parse compile 8% 809 ms
style layout 7% 763 ms
paint composite render 5% 509 ms
parse HTML 2% 172 ms
garbage collection 1% 144 ms
Total 10.24 s

Axe violations axe-core 4.13.0, full rule set

1 violating node across 1 rule, 1517 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • moderate region — All page content should be contained by landmarks 1 node
    Offending element
    1. #aws-page-skip-to-main 
      <a aria-label="Skip to main content link" class="m-sr-only m-sr-only-focusable m-skip-el" href="#aws-page-content-main" id="aws-page-skip-to-main">Skip to main content</a>

Best Practices failures 2 of 19 audits

  • errors-in-console — Browser errors were logged to the console 11 items
  • inspector-issues — Issues were logged in the `Issues` panel in Chrome Devtools 2 items

SEO failures 1 of 10 audits

  • link-text — Links do not have descriptive text 2 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 11 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 4.52 s 352 ms 0 4.11 s 1.42 s
2026-09-26 4.61 s 358 ms 0 4.21 s 1.47 s
2026-09-19 4.66 s 358 ms 0 4.23 s 1.49 s
2026-09-12 4.61 s 355 ms 0 4.17 s 1.48 s
2026-09-05 4.44 s 344 ms 0 4.01 s 1.43 s
2026-08-29 4.21 s 329 ms 0 3.79 s 1.35 s
2026-08-22 4.01 s 318 ms 0 3.66 s 1.30 s
2026-08-15 3.91 s 311 ms 0 3.60 s 1.27 s
2026-08-08 3.84 s 304 ms 0 3.58 s 1.25 s
2026-08-01 3.81 s 300 ms 0 3.58 s 1.24 s
2026-07-25 3.79 s 297 ms 0 3.58 s 1.25 s
2026-07-18 3.82 s 292 ms 0 3.63 s 1.28 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 8, 2026, 10:08 AM UTC 28 44.68 s 0 1.89 s 11.87 MB 3/3 ±0 2,467 -1% 150.8s Wayback
Oct 6, 2026, 5:13 AM UTC 33 45.50 s 0 1.03 s 11.61 MB 3/3 ±5 3,641 +46% 124s Wayback
Oct 1, 2026, 8:12 PM UTC 28 46.50 s 0 1.89 s 11.67 MB 3/3 ±1 2,458 -1% 160.1s Wayback
Sep 29, 2026, 5:45 PM UTC 33 21.75 s 0 1.04 s 11.80 MB 3/3 ±4 4,509 +81% 118.4s Wayback
Sep 26, 2026, 6:29 PM UTC 28 45.92 s 0 1.80 s 11.59 MB 3/3 ±1 2,639 +6% 142s Wayback
Sep 24, 2026, 6:13 PM UTC 28 45.65 s 0 1.82 s 11.83 MB 3/3 ±4 2,487 0% 156.3s Wayback
Sep 22, 2026, 2:21 PM UTC 27 44.51 s 0 2.14 s 11.75 MB 3/3 ±1 2,466 -1% 165.5s Wayback
Sep 20, 2026, 10:52 AM UTC 27 37.16 s 0 2.07 s 11.76 MB 3/3 ±1 2,471 -1% 156.6s Wayback
Sep 18, 2026, 8:56 AM UTC 29 51.17 s 0 1.53 s 11.50 MB 3/3 ±2 3,003 +21% 141.7s Wayback
Sep 16, 2026, 3:32 AM UTC 27 45.80 s 0 1.92 s 11.83 MB 3/3 ±1 2,477 0% 159.4s Wayback
Sep 14, 2026, 12:55 AM UTC 29 46.06 s 0 1.49 s 11.54 MB 3/3 ±1 2,923 +18% 143.4s Wayback
Sep 11, 2026, 8:37 PM UTC 28 45.16 s 0 1.80 s 11.52 MB 3/3 ±1 2,648 +6% 153.8s Wayback
Sep 9, 2026, 5:35 PM UTC 28 46.14 s 0 1.70 s 11.65 MB 3/3 ±13 2,502 +1% 77.5s Wayback
Sep 7, 2026, 3:00 PM UTC 27 46.71 s 0 2.28 s 11.61 MB 3/3 ±1 2,488 0% 80.6s Wayback
Sep 5, 2026, 3:06 AM UTC 27 45.29 s 0 2.13 s 11.60 MB 3/3 ±3 2,444 -2% 92.1s Wayback
Sep 3, 2026, 10:22 PM UTC 33 46.07 s 0 1.03 s 11.69 MB 3/3 ±3 3,056 +23% 71.8s Wayback
Sep 2, 2026, 8:47 PM UTC 27 46.64 s 0 1.93 s 11.77 MB 3/3 ±2 2,457 -1% 86.3s Wayback
Sep 1, 2026, 8:36 PM UTC 27 45.20 s 0 1.96 s 11.69 MB 3/3 ±3 2,352 -5% 92.7s Wayback
Aug 31, 2026, 5:54 PM UTC 27 42.45 s 0 2.03 s 11.43 MB 3/3 ±1 2,484 0% 84.4s Wayback
Aug 26, 2026, 10:48 PM UTC TRACING_ALREADY_STARTED: An internal Chrome error occurred. Please restart Chrome and try re-running Lighthouse. 47.6s
Aug 25, 2026, 10:26 PM UTC 27 45.99 s 0 2.20 s 11.62 MB 3/3 ±1 2,443 -2% 84.2s Wayback
Aug 24, 2026, 10:25 PM UTC 29 51.70 s 0 1.59 s 11.45 MB 3/3 ±4 2,878 +16% 76.4s Wayback
Aug 23, 2026, 10:23 PM UTC 27 44.54 s 0 2.04 s 11.62 MB 3/3 ±0 2,454 -1% 76.1s Wayback
Aug 22, 2026, 9:24 PM UTC 30 45.87 s 0 1.46 s 11.59 MB 3/3 ±2 2,675 +8% 74.6s Wayback
Aug 21, 2026, 8:33 PM UTC 28 35.78 s 0 1.89 s 11.45 MB 3/3 ±3 2,449 -1% 79.7s Wayback
Aug 20, 2026, 4:37 PM UTC 27 36.05 s 0 2.09 s 11.33 MB 3/3 ±1 2,435 -2% 82.9s Wayback