speedlify2

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

Measurement runs · Embed a score · Field data from the Chrome UX Report ·

cloudflare.com

https://www.cloudflare.com/

68 96 77 92 CWV AXE

Data from Aug 21, 2026, 11:31 AM UTC — 7h old.

Web Hosts · 1 measurement · since Aug 21, 2026 · last attempt 7h

Core Web Vitals field data, url-level

Real Chrome users, 28-day window (2026-07-23 → 2026-08-19). This is what Google measures you on.

LCP 2.48 s good
INP 277 ms needs-improvement
CLS 0 good

Scores

68
Performance
no change
96
Accessibility
no change
77
Best Practices
no change
92
SEO
no change

Lab metrics Lighthouse, mobile

Metric Current Previous Change Best Worst Trend
LCP Largest Contentful Paint 3.06 s 3.06 s 3.06 s
CLS Cumulative Layout Shift 0 0 0
TBT Total Blocking Time 975 ms 975 ms 975 ms
FCP First Contentful Paint 2.69 s 2.69 s 2.69 s
Speed Index 2.69 s 2.69 s 2.69 s
TTFB Time to First Byte 481 ms 481 ms 481 ms

What LCP is made of

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

resource load delay 355 ms
element render delay 190 ms
time to first byte 9 ms
resource load duration 6 ms

Field data Chrome UX Report, url-level

Real Chrome users, 28-day trailing window (2026-07-23 → 2026-08-19). This is what Google measures you on.

Metric p75 Rating Distribution (good / needs work / poor)
LCP CWV 2.48 s good 75.1% good
INP CWV Interaction to Next Paint — field only, Lighthouse cannot measure this in a lab run 277 ms needs-improvement 65.8% good
CLS CWV 0 good 96.7% good
FCP 1.88 s needs-improvement 73.8% good
TTFB 524 ms good 83.1% good

Lab vs field

Lab LCP 3.06 s · field p75 2.48 s · real users are 0.81× faster than the lab.

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-08-15 2.47 s 274 ms 0 1.88 s 520 ms
2026-08-08 2.48 s 270 ms 0 1.89 s 520 ms
2026-08-01 2.49 s 265 ms 0 1.90 s 534 ms
2026-07-25 2.50 s 264 ms 0 1.91 s 643 ms
2026-07-18 2.50 s 262 ms 0 1.90 s 720 ms
2026-07-11 2.57 s 261 ms 0 1.89 s 779 ms
2026-07-04 2.65 s 263 ms 0 1.93 s 816 ms
2026-06-27 2.79 s 266 ms 0 1.99 s 826 ms
2026-06-20 2.90 s 269 ms 0 2.06 s 847 ms
2026-06-13 2.93 s 274 ms 0 2.10 s 847 ms
2026-06-06 2.95 s 294 ms 0 2.12 s 864 ms
2026-05-30 2.92 s 343 ms 0 2.16 s 858 ms

Page weight

Metric Current Previous Change Best Worst Trend
Page Weight 2.55 MB 2.55 MB 2.55 MB
Requests 174 174 174
Third-party Weight 248.6 kB 248.6 kB 248.6 kB
Third-party CPU 65 ms 65 ms 65 ms
Unused JS 893.6 kB 893.6 kB 893.6 kB
Unused CSS 0 B 0 B 0 B

By resource type

script 1.85 MB · 83 req
image 418.9 kB · 45 req
document 110.3 kB · 4 req
stylesheet 84.3 kB · 3 req
other 49.5 kB · 34 req
font 28.8 kB · 3 req
third party 252.1 kB · 49 req

Third parties 12 entities

248.6 kB transferred, 65 ms of main thread time. This is the number most likely to regress without anyone on your team shipping anything.

Google Tag Manager 160.6 kB · 15 ms CPU
The Trade Desk 31.5 kB · 9 ms CPU
DemandBase 20.7 kB · 23 ms CPU
Twitter Online Conversion Tracking 14.4 kB · 7 ms CPU
Cloudflare 11.5 kB · 2 ms CPU

Page health

Metric Current Previous Change Best Worst Trend
Main Thread Work 38.24 s 38.24 s 38.24 s
Long Tasks 20 20 20
DOM Elements 3,003 3,003 3,003
A11y Failures 1 1 1
A11y Failing Nodes 8 8 8

Main thread work

other 18.25 s
style layout 8.54 s
script evaluation 6.84 s
paint composite render 3.90 s
script parse compile 363 ms
parse HTML 203 ms
garbage collection 146 ms

Axe violations axe-core , full rule set

The axe run failed: Navigation timeout of 120000 ms exceeded

Accessibility failures 1 of 26 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. 8 nodes

Hygiene

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

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h3

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 21, 2026, 11:31 AM UTC 68 3.06 s 0 975 ms 2.55 MB 3/3 ±4 2,467 309.6s

Embed this score

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

<speedlify-score speedlify-url="https://zachleat.github.io/speedlify2/" url="https://www.cloudflare.com/"></speedlify-score>