speedlify2

Lighthouse lab metrics and Chrome UX Report field data for a list of sites, recorded on every run and compared over time — measured continuously.

Measurement runs · Embed a score ·

central.sonatype.com

https://central.sonatype.com/

31 95 69 92 AXE CWV

Data from Aug 25, 2026, 4:35 PM UTC 13h old

Overall #1,470 Package Managers #14 · 1 measurement · since Aug 25, 2026

Stack

Detected on the same page load as the accessibility pass — the generator from <meta name="generator"> or the shape of the page, the host from response headers.

Next.js Built with Next.js

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-07-27 → 2026-08-23). This is what Google measures you on.

LCP 3.42 s needs-improvement
INP 287 ms needs-improvement
CLS 0.460 poor

Scores

31
Performance
no change
95
Accessibility
no change
69
Best Practices
no change
92
SEO
no change

Filmstrip Lighthouse, mobile

How the page drew during the measured load, at 8 points across 3.00 s.

  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

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 6.42 s 6.42 s 6.42 s
CLS Cumulative Layout Shift 0.450 0.450 0.450
TBT Total Blocking Time 1.50 s 1.50 s 1.50 s
FCP First Contentful Paint 1.63 s 1.63 s 1.63 s
Speed Index 2.44 s 2.44 s 2.44 s
TTFB Time to First Byte 640 ms 640 ms 640 ms

What LCP is made of observed, unthrottled

A flat LCP number tells you something regressed. The subparts tell you whether it was the server, resource discovery, the download, or rendering.

Measured on the trace before throttling is modelled, so these are real durations that will not sum to the 6.42 s above — that figure is a simulation of the same load on a slow phone and connection. Read these for the proportions: which phase dominates.

element render delay 208 ms
resource load delay 85 ms
time to first byte 54 ms
resource load duration 54 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-07-27 → 2026-08-23). This is what Google measures you on.

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 3.42 s needs-improvement 55.2% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 287 ms needs-improvement 61.9% good
CLS CWV 0.460 poor 42.5% good
FCP 2.40 s needs-improvement 56.5% good
TTFB 1.57 s needs-improvement 42% good

Lab vs field

Lab LCP 6.42 s · field p75 3.42 s · real users are 0.53× faster than the lab.

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-08-22 3.44 s 287 ms 0.470 2.43 s 1.57 s
2026-08-15 3.49 s 288 ms 0.470 2.50 s 1.61 s
2026-08-08 3.51 s 287 ms 0.470 2.48 s 1.59 s
2026-08-01 3.44 s 288 ms 0.470 2.41 s 1.58 s
2026-07-25 3.31 s 284 ms 0.470 2.33 s 1.53 s
2026-07-18 3.24 s 292 ms 0.470 2.34 s 1.52 s
2026-07-11 3.22 s 290 ms 0.470 2.41 s 1.52 s
2026-07-04 3.20 s 292 ms 0.470 2.38 s 1.42 s
2026-06-27 3.28 s 296 ms 0.460 2.40 s 1.51 s
2026-06-20 3.41 s 225 ms 0.460 2.40 s 1.44 s
2026-06-13 3.54 s 224 ms 0.460 2.44 s 1.50 s
2026-06-06 3.54 s 225 ms 0.460 2.42 s 1.51 s

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 3.17 MB 3.17 MB 3.17 MB
Requests 85 85 85
Third-party Weight 908 kB 908 kB 908 kB
Third-party CPU 273 ms 273 ms 273 ms
Unused JS 1.64 MB 1.64 MB 1.64 MB
Unused CSS 13.6 kB 13.6 kB 13.6 kB

By resource type

script 2.44 MB · 31 req
image 548 kB · 9 req
font 91.6 kB · 5 req
stylesheet 69.7 kB · 15 req
other 14.9 kB · 23 req
document 10.3 kB · 1 req
third party 908 kB · 13 req

Third parties 5 entities

908 kB transferred, 273 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

Google Tag Manager 485 kB · 150 ms CPU
ZenDesk 396 kB · 112 ms CPU
Bizible 26.2 kB · 11 ms CPU
scarf.sh 216 B · 0 ms CPU
Other Google APIs/SDKs 21 B · 0 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 4.37 s 4.37 s 4.37 s
Long Tasks 16 16 16
DOM Elements 553 553 553
Axe Violations Violating nodes from a full axe run — stricter than Lighthouse's subset 14 14 14
A11y Failures 2 2 2
A11y Failing Nodes 2 2 2

Main thread work

script evaluation 2.46 s
other 849 ms
script parse compile 758 ms
style layout 175 ms
paint composite render 75 ms
parse HTML 37 ms
garbage collection 14 ms

Axe violations axe-core 4.13.0, full rule set

14 violating nodes across 3 rules, 1204 passing. This is a standalone axe run, stricter than the subset Lighthouse folds into its score above — and it is the second tiebreaker in the ranking.

  • moderate region — All page content should be contained by landmarks 12 nodes
  • serious color-contrast — Elements must meet minimum color contrast ratio thresholds 1 node
  • moderate heading-order — Heading levels should only increase by one 1 node

Accessibility failures 2 of 30 audits

Tracked as a count, not just the score — the weighted score is coarse enough that you can ship a broken component and barely move it.

  • color-contrast — Background and foreground colors do not have a sufficient contrast ratio. 1 node
  • heading-order — Heading elements are not in a sequentially-descending order 1 node

Hygiene

Changes rarely — which is exactly why a change is worth noticing.

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2 2 console errors

Measurement log

Every stored run for this URL, newest first. Failures are kept as records — "this site was down on Tuesday" is data too.

When PerfLCPCLSTBTWeight RunsSpreadBenchTook
Aug 25, 2026, 4:35 PM UTC 31 6.42 s 0.450 1.50 s 3.17 MB 3/3 ±13 2,479 38.9s

Embed this score

Live below, then the markup that produces it. Drop that on any page to show central.sonatype.com's scores, updated whenever this instance re-measures — more about the component. Don’t forget to bundle the speedlify2-score.js component code into your site!

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://central.sonatype.com/"></speedlify2-score>