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

geminicli.com

https://geminicli.com/

62PERF 91A11Y 100BEST 83SEO ✗AXE ✓CWV

Ranks Overall #1,573 Astro Showcase #170

Data from Oct 2, 2026, 1:35 PM UTC old Measured once a month · 1 run since Oct 2, 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

Astro 5.16.16 Built with Astro 5.16.16

Lighthouse Scores LAB Simulated

62
Performance
no change
91
Accessibility
no change
100
Best Practices
no change
83
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 (2026-09-02 → 2026-09-29), url-level.

Metric Lab Simulated Field
Value Change / range Trend p75 Distribution
LCP CWV Largest Contentful Paint 7.95 s poor — 7.95 s – 7.95 s 1.65 s good 87.5% 7.6% 4.9%
INP CWV Interaction to Next Paint — field only, no lab run can measure it n/a — 90 ms good 91.8% 6.2% 2%
CLS CWV Cumulative Layout Shift 0.020 good — 0.020 – 0.020 0 good 93.9% 4.9% 1.2%
TBT Total Blocking Time 137 ms good — 137 ms – 137 ms n/a —
FCP First Contentful Paint 4.84 s poor — 4.84 s – 4.84 s 1.31 s good 84.6% 9.6% 5.8%
Speed Index 4.84 s needs work — 4.84 s – 4.84 s n/a —
TTFB Time to First Byte 604 ms good — 604 ms – 604 ms 556 ms good 84.1% 11.1% 4.9%

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.

element render delay 161 ms
resource load duration 68 ms
resource load delay 10 ms
time to first byte 5 ms

LCP LAB Simulated vs LCP FIELD

Lab 7.95 s
Field p75 1.65 s

The lab LCP is 4.82× the field p75 — real users likely have above-average hardware or network connectivity.

Page weight

Metric Value Change / range Trend
Page Weight 1.25 MB — 1.25 MB – 1.25 MB
Requests 32 — 32 – 32
Third-party Weight 684 kB — 684 kB – 684 kB
Third-party CPU 66 ms — 66 ms – 66 ms
Unused JS 71.5 kB — 71.5 kB – 71.5 kB
Unused CSS 0 B — 0 B – 0 B

By resource type

Type Transfer Share Size Requests
font 41.6% 516 kB 5
image 41.3% 513 kB 14
script 14.7% 182 kB 4
stylesheet 1.9% 23.7 kB 6
document 0.6% 7.4 kB 1
Total 1.25 MB 32

Third parties 2 entities

Entity Transfer Size Main thread Simulated
Google Fonts font 523 kB 0 ms
Google Tag Manager script 161 kB 66 ms
Total 684 kB 66 ms

Page health

Metric Value Change / range Trend
Main Thread Work 960 ms — 960 ms – 960 ms
Long Tasks 3 — 3 – 3
DOM Elements 150 — 150 – 150
Axe Violations Violating nodes from a full Axe CLI run (more than Lighthouse reports) 7 — 7 – 7
A11y Failures 3 — 3 – 3
A11y Failing Nodes 5 — 5 – 5

Main thread work

Task Time Share Duration Simulated
other 47% 449 ms
script evaluation 29% 276 ms
style layout 14% 139 ms
script parse compile 5% 45 ms
parse HTML 3% 29 ms
paint composite render 2% 22 ms
Total 960 ms

Axe violations axe-core 4.13.0, full rule set

7 violating nodes across 4 rules, 132 passing. This is a standalone Axe CLI run and is stricter than the subset Lighthouse already includes.

  • critical image-alt — Images must have alternative text 3 nodes
    Offending elements
    1. .tagline-image 
      <img class="tagline-image astro-m4ig3dvs" src="/icon.png">
    2. .content-copy 
      <img class="content-copy astro-m4ig3dvs" src="/assets/content_copy.png">
    3. img[src$="gemini-cli-home.svg"] 
      <img src="/assets/gemini-cli-home.svg" class="astro-m4ig3dvs">
  • moderate region — All page content should be contained by landmarks 2 nodes
    Offending elements
    1. .announcement-banner 
      <div class="announcement-banner astro-yriad4ts">
    2. .mr-2 
      <div class="mr-2 astro-uz2wdcl7">
  • serious link-name — Links must have discernible text 1 node
    Offending element
    1. .feedback-link 
      <a href="https://github.com/google-gemini/gemini-cli/issues/new?template=website_issue.yml&url=https%3A%2F%2Fgeminicli.com%2F" target="_blank" rel="noopener noreferrer" class="feedback-link astro-3ef…
  • serious nested-interactive — Interactive controls must not be nested 1 node
    Offending element
    1. .links-and-menu 
      <div class="links-and-menu is-home astro-3ef6ksr2" role="button" aria-label="Open navigation menu">

Accessibility failures 3 of 25 audits

  • image-alt — Image elements do not have `[alt]` attributes 3 nodes
  • link-name — Links do not have a discernible name 1 node
  • label-content-name-mismatch — Elements with visible text labels do not have matching accessible names. 1 node

SEO failures 2 of 9 audits

  • meta-description — Document does not have a meta description
  • image-alt — Image elements do not have `[alt]` attributes 3 items

Hygiene

HTTPS HSTS CSP Clickjacking protection Origin isolation Trusted Types bfcache h2

Measurement log

Field history 25 weeks

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

Week ending LCPINPCLSFCPTTFB
2026-09-26 1.65 s 90 ms 0 1.30 s 560 ms
2026-09-19 1.66 s 89 ms 0 1.30 s 552 ms
2026-09-12 1.68 s 90 ms 0 1.33 s 574 ms
2026-09-05 1.65 s 89 ms 0 1.31 s 584 ms
2026-08-29 1.66 s 88 ms 0 1.33 s 585 ms
2026-08-22 1.69 s 88 ms 0 1.36 s 625 ms
2026-08-15 1.70 s 89 ms 0 1.34 s 619 ms
2026-08-08 1.74 s 90 ms 0 1.36 s 628 ms
2026-08-01 1.77 s 90 ms 0 1.39 s 656 ms
2026-07-25 1.78 s 90 ms 0 1.38 s 660 ms
2026-07-18 1.80 s 92 ms 0 1.42 s 669 ms
2026-07-11 1.80 s 92 ms 0 1.42 s 661 ms

Runs

Every stored run for this URL, newest first.

When Scores PerfLCPCLSTBTWeight RunsSpreadBenchTook Archive
Oct 2, 2026, 1:35 PM UTC 62 7.95 s 0.020 137 ms 1.25 MB 3/3 ±13 2,477 0% 27.9s Wayback