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

nasa.gov

https://www.nasa.gov/

63PERF 95A11Y 96BEST 100SEO !AXE ✓CWV

Ranks Overall #1,033 WordPress Showcase #1

Data from Sep 29, 2026, 12:02 AM UTC old Measured once a month · 2 runs since Sep 21, 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

WordPress 7.0.6 Built with WordPress 7.0.6
Self-hosted · nginx Hosted by Self-hosted

Filmstrip LAB Throttled

How the page drew during the measured load, at 9 points across 29.98 s. Compare this filmstrip against another site.

  1. 2.47 s
  2. 7.50 s
  3. 11.24 s
  4. 13.26 s
  5. 14.99 s
  6. 18.74 s
  7. 22.48 s
  8. 26.23 s
  9. 29.98 s

Lighthouse Scores LAB Simulated

63
Performance
no change
95
Accessibility
no change
96
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 (2026-08-30 → 2026-09-26), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 6.62 s poor ↓ -1685 ms (-20.3%) 6.62 s – 8.30 s 2.19 s good 80.7% 12.9% 6.4%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 144 ms good 85.8% 11.1% 3.1%
CLS CWV Cumulative Layout Shift 0 good → no change 0 – 0 0 good 95.1% 3.4% 1.6%
TBT Total Blocking Time 270 ms needs work ↓ -86 ms (-24.2%) 270 ms – 356 ms n/a —
FCP First Contentful Paint 1.92 s needs work ↓ -40 ms (-2%) 1.92 s – 1.96 s 1.71 s good 76.5% 15.8% 7.6%
Speed Index 7.02 s poor ↑ +2561 ms (+57.4%) 4.46 s – 7.02 s n/a —
TTFB Time to First Byte 624 ms good ↓ -8 ms (-1.3%) 624 ms – 632 ms 1.07 s needs work 67.7% 17.9% 14.3%

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 12.56 s
time to first byte 574 ms
resource load delay 91 ms
element render delay 43 ms

LCP LAB Simulated vs LCP FIELD

Lab 6.62 s
Field p75 2.19 s

The lab LCP is 3.03× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 33.04 MB ↑ +26000.4 kB (+414.8%) 6.42 MB – 33.04 MB
Requests 79 ↑ +9 (+12.9%) 70 – 79
Third-party Weight 520 kB ↓ -152.0 kB (-23%) 520 kB – 676 kB
Third-party CPU 202 ms ↓ -30 ms (-12.8%) 202 ms – 232 ms
Unused JS 231 kB ↓ -136.4 kB (-37.7%) 231 kB – 371 kB
Unused CSS 29.6 kB ↓ -23 B (-0.1%) 29.6 kB – 29.6 kB

By resource type

Type Transfer Share Size Requests
image 97.1% 32.10 MB 42
script 2.2% 722 kB 22
font 0.4% 136 kB 5
document 0.1% 47.0 kB 1
stylesheet 0.1% 38.0 kB 3
other <0.1% 4.2 kB 6
Total 33.04 MB 79

Third parties 4 entities

Entity Transfer Size Main thread Simulated
Google Tag Manager script 478 kB 166 ms
Parse.ly 27.6 kB 21 ms
digitalgov.gov 14.2 kB 15 ms
Google Analytics 595 B 0 ms
Total 520 kB 202 ms

Without JavaScript

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

Scripts disabled
As rendered

1.1% of pixels differ — they are nearly 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 2.80 s ↑ +190 ms (+7.3%) 2.61 s – 2.80 s
Long Tasks 10 → no change 10 – 10
DOM Elements 2,458 ↓ -4 (-0.2%) 2,458 – 2,462
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 2 → no change 2 – 2
A11y Failures 1 → no change 1 – 1
A11y Failing Nodes 2 → no change 2 – 2

Main thread work

Task Time Share Duration Simulated
script evaluation 34% 964 ms
other 32% 885 ms
style layout 12% 344 ms
script parse compile 8% 222 ms
parse HTML 7% 195 ms
paint composite render 6% 170 ms
garbage collection 1% 23 ms
Total 2.80 s

Axe violations axe-core 4.13.0, full rule set

2 violating nodes across 1 rule, 1193 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • critical button-name — Buttons must have discernible text 2 nodes
    Offending elements
    1. #global-navigation-trigger--mobile 
      <button id="global-navigation-trigger--mobile" class="hds-global-menu-toggle menu-toggle menu-mobile-toggle" aria-expanded="false" data-menu-action="open" data-menu-location="left">
    2. .hds-search-panel-mobile-trigger 
      <button class="hds-search-panel-mobile-trigger search-mobile color-carbon-20 menu-toggle" data-menu-action="open" data-menu-location="right">

Accessibility failures 1 of 27 audits

  • button-name — Buttons do not have an accessible name 2 nodes

Best Practices failures 1 of 18 audits

  • errors-in-console — Browser errors were logged to the console 1 item

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 1 console error

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-10-03 2.20 s 144 ms 0 1.72 s 1.07 s
2026-09-26 2.19 s 144 ms 0 1.71 s 1.07 s
2026-09-19 2.17 s 153 ms 0 1.71 s 1.07 s
2026-09-12 2.18 s 155 ms 0 1.72 s 1.07 s
2026-09-05 2.19 s 156 ms 0 1.67 s 986 ms
2026-08-29 2.17 s 156 ms 0 1.67 s 987 ms
2026-08-22 2.15 s 147 ms 0 1.67 s 998 ms
2026-08-15 2.16 s 145 ms 0 1.67 s 1.00 s
2026-08-08 2.11 s 143 ms 0 1.68 s 1.05 s
2026-08-01 2.12 s 142 ms 0 1.66 s 1.02 s
2026-07-25 2.15 s 144 ms 0 1.68 s 1.02 s
2026-07-18 2.14 s 144 ms 0 1.69 s 1.04 s

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 29, 2026, 12:02 AM UTC 63 6.62 s 0 270 ms 33.04 MB 3/3 ±2 2,501 +1% 94.5s Wayback
Sep 21, 2026, 11:20 PM UTC 63 8.30 s 0 356 ms 6.42 MB 3/3 ±13 2,484 0% 97.4s Wayback