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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
98
GRADE
A+
FIX
0
REVIEW
2
PASS
11
INFO
1

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
96
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

232 ms

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

397 ms

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

0 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.122

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

232 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

397 ms

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
14
11 PASS 2 REVIEW
B
Image Optimization
2 images, 0 KB saveable
REVIEW
2 images, 0 KB saveable
Warning::
https://getcomposer.org/img/logo-composer-transpar... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://getcomposer.org/img/private-packagist-logo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
2 images 100 KB
0 oversized -0 KB
2 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
HTTP Caching
no-cache, private
REVIEW
no-cache, private
Info::
Cache-Control header is set
Got: no-cache, private
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache, private

DirectiveValueMeaning
no-cache—Cache but always revalidate first
private—Only browser cache, not CDN/proxy
A+
Page Weight Budget
162 KB transferred, 7 requests
PASS
162 KB transferred, 7 requests
Info::
Page weighs 300 KB (162 KB transferred)
Info::
7 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
162 KB / 2.4 MB budget
162 KB transferred
7 requests
0.03 g CO2 per page load
Images 100.3 KiB 62%
JavaScript 52.0 KiB 32%
CSS 5.6 KiB 3%
Other 2.5 KiB 2%
HTML 1.5 KiB 1%
Other 427 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Other 53% Script Evaluation 17% Style & Layout 17% Script Parsing & Compilation 5% Rendering 5%
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
1 scripts, 40 KB unused
PASS
1 scripts, 40 KB unused
Warning::
https://getcomposer.org/build/app.js?v=3: 40 KB unused (78%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 40 KB
40 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://getcomposer.org/build/app.js?v=352 KB40 KB (78%)✓1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Page Weight Inventory
7 resources · 162 KB · 40 KB savings available
PASS
7 resources · 162 KB · 40 KB savings available
Info::
Within 1MB page-weight target
Got: 162 KB
7 resources · 162.4 KiB · 0 third-party Within 1MB page-weight target
Image 63% · 102.9 KiB
JavaScript 32% · 52.0 KiB
CSS 3% · 5.6 KiB
Document 1% · 1.5 KiB
Other 0% · 427 B

~40.3 KiB of savings available

Remove unused JavaScript: 40.3 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: OVHcloud

Network Waterfall
7 requests over 250ms
INFO
0 ms 200 ms 400 ms FCP 232 ms LCP 397 mshttps://getcomposer.org// https://getcomposer.org/ — 200 — 1.5 KiB — 68 ms — h2https://getcomposer.org/build/app.css?v=2/build/app.css?v=2 https://getcomposer.org/build/app.css?v=2 — 200 — 5.6 KiB — 25 ms — h2https://getcomposer.org/img/logo-composer-transparent4.png/img/logo-composer-transparent4.png https://getcomposer.org/img/logo-composer-transparent4.png — 200 — 94.8 KiB — 85 ms — h2https://getcomposer.org/img/private-packagist-logo-horizontal-2025.svg/img/private-packagist-logo-horizon... https://getcomposer.org/img/private-packagist-logo-horizontal-2025.svg — 200 — 5.6 KiB — 85 ms — h2https://getcomposer.org/build/app.js?v=3/build/app.js?v=3 https://getcomposer.org/build/app.js?v=3 — 200 — 52.0 KiB — 79 ms — h2https://getcomposer.org/api/event/api/event https://getcomposer.org/api/event — 202 — 427 B — 61 ms — h2https://getcomposer.org/favicon.ico/favicon.ico https://getcomposer.org/favicon.ico — 200 — 2.5 KiB — 24 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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