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.

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flag.is

https://flag.is/

100PERF 100A11Y 100BEST 92SEO –AXE –CWV

Ranks Overall #1,133 Built Awesome #779

Data from Oct 7, 2026, 9:54 AM UTC old Measured once a week · 11 runs since Aug 20, 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).

Lighthouse Scores LAB Simulated

100
Performance
no change
100
Accessibility
no change
100
Best Practices
no change
92
SEO
↓ -8 (-8%)

Metrics LAB

No field data: the Chrome UX Report is not being collected for this project, so every figure below is from the Lighthouse run.

Metric Lab Simulated
Value Change / range Trend
LCP CWV (estimate) Largest Contentful Paint 935 ms good ↑ +83 ms (+9.7%) significant 819 ms – 935 ms
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a —
CLS CWV (estimate) Cumulative Layout Shift 0 good → no change 0 – 0
TBT Total Blocking Time 0 ms good → no change 0 ms – 54 ms
FCP First Contentful Paint 935 ms good ↑ +83 ms (+9.7%) significant 803 ms – 935 ms
Speed Index 935 ms good ↓ -343 ms (-26.8%) significant 886 ms – 1.30 s
TTFB Time to First Byte 714 ms good ↑ +114 ms (+19%) significant 600 ms – 714 ms

LCP Subparts LAB Unthrottled

The subparts attribute LCP to your server, resource discovery, download, or rendering. Note that the Lab LCP shown above is a simulated throttled estimate.

time to first byte 117 ms
element render delay 50 ms

Page weight

Metric Value Change / range Trend
Page Weight 86.7 kB ↓ -23 B 86.7 kB – 87.5 kB
Requests 80 → no change 80 – 80
Third-party Weight 0 B → no change 0 B – 0 B
Third-party CPU 0 ms → no change 0 ms – 0 ms
Unused JS 0 B → no change 0 B – 0 B
Unused CSS 0 B → no change 0 B – 0 B

By resource type

Type Transfer Share Size Requests
image 87.3% 75.6 kB 78
document 12.1% 10.5 kB 1
other 0.7% 585 B 1
Total 86.7 kB 80

Page health

Metric Value Change / range Trend
Main Thread Work 1.22 s ↑ +43 ms (+3.7%) 1.09 s – 1.25 s
Long Tasks 0 ↓ -1 (-100%) significant 0 – 2
DOM Elements 359 → no change 359 – 359
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 7 → no change 7 – 7
A11y Failures 0 → no change 0 – 0
A11y Failing Nodes 0 → no change 0 – 0

Main thread work

Task Time Share Duration Simulated
other 57% 699 ms
paint composite render 19% 239 ms
style layout 17% 203 ms
parse HTML 4% 54 ms
script evaluation 2% 28 ms
script parse compile 0% 2 ms
Total 1.22 s

Axe violations axe-core , full rule set

The axe run failed: net::ERR_CONNECTION_TIMED_OUT at https://flag.is/

SEO failures 1 of 9 audits

  • robots-txt — robots.txt is not valid

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache http/1.1

Measurement log

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 7, 2026, 9:54 AM UTC 100 935 ms 0 0 ms 86.7 kB 2/3 ±0 2,366 -5% 157.7s Wayback
Sep 30, 2026, 8:05 AM UTC 100 852 ms 0 0 ms 86.7 kB 1/3 — 2,498 0% 505.1s Wayback
Sep 23, 2026, 5:32 AM UTC 100 819 ms 0 0 ms 86.7 kB 2/3 ±0 2,452 -1% 456.2s Wayback
Sep 16, 2026, 3:32 AM UTC 100 829 ms 0 0 ms 86.7 kB 1/3 — 2,498 0% 504.8s Wayback
Sep 9, 2026, 3:17 AM UTC 100 843 ms 0 54 ms 86.7 kB 1/3 — 3,545 +43% 505.5s Wayback
Sep 2, 2026, 3:04 AM UTC 100 873 ms 0 0 ms 86.7 kB 1/3 — 2,791 +12% 446.2s Wayback
Sep 1, 2026, 5:40 PM UTC lighthouse timed out after 120000ms 141.1s
Sep 1, 2026, 7:21 AM UTC CHROME_INTERSTITIAL_ERROR: Chrome prevented page load with an interstitial. Make sure you are testing the correct URL and that the server is properly responding to all requests. 70s
Aug 31, 2026, 10:39 PM UTC lighthouse timed out after 120000ms 143.8s
Aug 29, 2026, 5:49 AM UTC NO_FCP: The page did not paint any content. Please ensure you keep the browser window in the foreground during the load and try again. (NO_FCP) 66.9s
Aug 20, 2026, 10:31 PM UTC 100 836 ms 0 0 ms 87.5 kB 2/3 ±0 2,703 +9% 306.6s Wayback

Embed this score

Use this web component to show flag.is's scores on any website, updated whenever this instance re-measures. Don’t forget to bundle the speedlify2-score.js component code into your site! 

<speedlify2-score speedlify-url="https://www.speedlify.dev/" url="https://flag.is/"></speedlify2-score>