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

nerdwallet.com

https://www.nerdwallet.com/

83PERF 85A11Y 77BEST 92SEO โœ—AXE โœ“CWV

Ranks Overall #1,448 Next.js Showcase #8

Data from Sep 21, 2026, 11:07 PM UTC old Measured once a week ยท 1 run since Sep 21, 2026

Elsewhere: PageSpeed Insights ยท Calibre ยท Treo ยท CrUX Vis ยท Tame the Bots ยท Scoring Calculator ยท 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

Astro Built with Astro
Uses ReactReact
Vercel Hosted by Vercel

Filmstrip LAB Throttled

How the page drew during the measured load, at 9 points across 44.78 s. Compare this filmstrip against another site.

  1. 856 ms
  2. 2.56 s
  3. 11.20 s
  4. 16.79 s
  5. 22.39 s
  6. 27.99 s
  7. 33.59 s
  8. 39.18 s
  9. 44.78 s

Lighthouse Scores LAB Simulated

83
Performance
no change
85
Accessibility
no change
77
Best Practices
no change
92
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 (2026-08-23 → 2026-09-19), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 2.80 s needs work 2.80 s – 2.80 s 1.37 s good 89.2% 6.7% 4.1%
INP CWV Interaction to Next Paint โ€” field only, no lab run can measure it n/a 119 ms good 87.2% 10.1% 2.7%
CLS CWV Cumulative Layout Shift 0 good 0 – 0 0 good 96.8% 2.2% 1.1%
TBT Total Blocking Time 462 ms needs work 462 ms – 462 ms n/a
FCP First Contentful Paint 1.46 s good 1.46 s – 1.46 s 1.03 s good 87.6% 7% 5.4%
Speed Index 2.48 s good 2.48 s – 2.48 s n/a
TTFB Time to First Byte 513 ms good 513 ms – 513 ms 620 ms good 81.3% 11% 7.7%

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 1.56 s
time to first byte 646 ms
resource load delay 325 ms
element render delay 24 ms

LCP LAB Simulated vs LCP FIELD

Lab 2.80 s
Field p75 1.37 s

The lab LCP is 2.05ร— the field p75 โ€” real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 1.66 MB 1.66 MB – 1.66 MB
Requests 135 135 – 135
Third-party Weight 775 kB 775 kB – 775 kB
Third-party CPU 158 ms 158 ms – 158 ms
Unused JS 519 kB 519 kB – 519 kB
Unused CSS 19.5 kB 19.5 kB – 19.5 kB

By resource type

Type Transfer Share Size Requests
script 67.5% 1.11 MB 35
image 16.1% 265 kB 42
document 8.2% 136 kB 1
other 4.2% 69.1 kB 32
font 3.9% 64.5 kB 5
Total 1.66 MB 135

Third parties 5 entities

Entity Transfer Size Main thread Simulated
Google Tag Manager script 535 kB 105 ms
Optanon script 235 kB 53 ms
browser-intake-datadoghq.com 4.6 kB 0 ms
Google/Doubleclick Ads 50 B 0 ms
Other Google APIs/SDKs 21 B 0 ms
Total 775 kB 158 ms

Without JavaScript

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

Scripts disabled
As rendered

15.2% 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 11.48 s 11.48 s – 11.48 s
Long Tasks 13 13 – 13
DOM Elements 2,655 2,655 – 2,655
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 7 7 – 7
A11y Failures 5 5 – 5
A11y Failing Nodes 11 11 – 11

Main thread work

Task Time Share Duration Simulated
other 47% 5.44 s
script evaluation 21% 2.35 s
paint composite render 16% 1.78 s
style layout 13% 1.48 s
script parse compile 2% 185 ms
garbage collection 1% 151 ms
parse HTML 1% 98 ms
Total 11.48 s

Axe violations axe-core 4.13.0, full rule set

7 violating nodes across 4 rules, 1811 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • serious color-contrast โ€” Elements must meet minimum color contrast ratio thresholds 4 nodes
  • serious aria-prohibited-attr โ€” Elements must only use permitted ARIA attributes 1 node
  • serious link-in-text-block โ€” Links must be distinguishable without relying on color 1 node
  • serious scrollable-region-focusable โ€” Scrollable region must have keyboard access 1 node

Accessibility failures 5 of 28 audits

  • color-contrast โ€” Background and foreground colors do not have a sufficient contrast ratio. 4 nodes
  • label-content-name-mismatch โ€” Elements with visible text labels do not have matching accessible names. 4 nodes
  • aria-prohibited-attr โ€” Elements use prohibited ARIA attributes 1 node
  • link-in-text-block โ€” Links rely on color to be distinguishable. 1 node
  • target-size โ€” Touch targets do not have sufficient size or spacing. 1 node

Best Practices failures 3 of 18 audits

  • third-party-cookies โ€” Uses third-party cookies 1 item
  • inspector-issues โ€” Issues were logged in the `Issues` panel in Chrome Devtools 1 item
  • valid-source-maps โ€” Missing source maps for large first-party JavaScript 3 items

SEO failures 1 of 10 audits

  • crawlable-anchors โ€” Links are not crawlable 2 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-19 1.37 s 119 ms 0 1.03 s 620 ms
2026-09-12 1.40 s 117 ms 0 1.05 s 640 ms
2026-09-05 1.46 s 119 ms 0 1.09 s 672 ms
2026-08-29 1.50 s 117 ms 0 1.12 s 698 ms
2026-08-22 1.52 s 113 ms 0 1.15 s 745 ms
2026-08-15 1.55 s 114 ms 0 1.17 s 786 ms
2026-08-08 1.54 s 111 ms 0 1.16 s 791 ms
2026-08-01 1.55 s 111 ms 0 1.19 s 796 ms
2026-07-25 1.54 s 112 ms 0 1.21 s 759 ms
2026-07-18 1.54 s 111 ms 0 1.24 s 724 ms
2026-07-11 1.56 s 113 ms 0 1.29 s 721 ms
2026-07-04 1.62 s 114 ms 0 1.35 s 737 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Sep 21, 2026, 11:07 PM UTC 83 2.80 s 0 462 ms 1.66 MB 3/3 ยฑ3 2,888 +16% 262s Wayback