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https://grammaireactif.free.nf/learner/dashboard.php

Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
97
GRADE
A+
FIX
0
REVIEW
4
PASS
15
INFO
3

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

Mobile Desktop
100
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.

343 ms

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

423 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.

0.000

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

343 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.

423 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
22
15 PASS 4 REVIEW
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
HTTP/3 (QUIC) is not advertised
HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

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

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
A+
Page Weight Budget
128 KB transferred, 8 requests
PASS
128 KB transferred, 8 requests
Info::
Page weighs 193 KB (128 KB transferred)
Info::
8 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
128 KB / 2.4 MB budget
128 KB transferred
8 requests
0.03 g CO2 per page load
Images 98.0 KiB 77%
CSS 12.8 KiB 10%
JavaScript 7.4 KiB 6%
Other 6.8 KiB 5%
HTML 3.1 KiB 2%
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+
Image Optimization
1 images, 0 KB saveable
PASS
1 images, 0 KB saveable
Info::
All images are well-optimized
1 images 98 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Other 51% Style & Layout 34% Script Evaluation 8% Rendering 3% Parse HTML & CSS 3%
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
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://grammaireactif.free.nf/aes.js5 KB—✓1st
https://grammaireactif.free.nf/assets/js/app.js?v=17939705592 KB—✓1st
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+
Document Compression
Document response uses brotli
PASS
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
PASS
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+
Page Weight Inventory
8 resources · 128 KB · 0 KB savings available
PASS
8 resources · 128 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 128 KB
8 resources · 128.1 KiB · 0 third-party Within 1MB page-weight target
Image 81% · 104.3 KiB
CSS 10% · 12.8 KiB
JavaScript 6% · 7.4 KiB
Document 3% · 3.6 KiB
Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
8 requests over 459ms
INFO
0 ms 200 ms 400 ms FCP 343 ms LCP 423 mshttps://grammaireactif.free.nf/learner/dashboard.php/learner/dashboard.php https://grammaireactif.free.nf/learner/dashboard.php — 200 — 742 B — 100 ms — http/1.1https://grammaireactif.free.nf/aes.js/aes.js https://grammaireactif.free.nf/aes.js — 200 — 5.0 KiB — 33 ms — http/1.1https://grammaireactif.free.nf/learner/dashboard.php?i=1/learner/dashboard.php?i=1 https://grammaireactif.free.nf/learner/dashboard.php?i=1 — 302 — 506 B — 58 ms — http/1.1https://grammaireactif.free.nf/login.php/login.php https://grammaireactif.free.nf/login.php — 200 — 2.4 KiB — 44 ms — http/1.1https://grammaireactif.free.nf/assets/css/style.css?v=1793970559/assets/css/style.css?v=1793970559 https://grammaireactif.free.nf/assets/css/style.css?v=1793970559 — 200 — 12.8 KiB — 48 ms — http/1.1https://grammaireactif.free.nf/assets/images/logo.png?v=1793970740/assets/images/logo.png?v=179397074... https://grammaireactif.free.nf/assets/images/logo.png?v=1793970740 — 200 — 98.0 KiB — 150 ms — http/1.1https://grammaireactif.free.nf/assets/js/app.js?v=1793970559/assets/js/app.js?v=1793970559 https://grammaireactif.free.nf/assets/js/app.js?v=1793970559 — 200 — 2.3 KiB — 84 ms — http/1.1https://grammaireactif.free.nf/assets/images/favicon.png?v=1793970740/assets/images/favicon.png?v=179397... https://grammaireactif.free.nf/assets/images/favicon.png?v=1793970740 — 200 — 6.3 KiB — 35 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
2 images, 195 KB total, 94 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

195 KB

Oversized

1

Wasted

94 KB

1 missing lazy loading
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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