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Performance

· 24 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
96
GRADE
A
FIX
0
REVIEW
3
PASS
20
INFO
1

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
91
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.

1.35 s

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

1.50 s

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

94 ms

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

0.049

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

1.35 s

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

1.95 s

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
24
20 PASS 3 REVIEW
B
JS Execution Cost
924ms total JS execution
REVIEW
924ms total JS execution
Warning::
https://koalapic.com/en/: 492ms CPU time
Info::
https://koalapic.com/static/js/vendor/alpinejs-3.1...: 241ms CPU time
Info::
Unattributable: 192ms CPU time

Main Thread Breakdown

Style & Layout 32% Other 27% Script Evaluation 25% Rendering 6% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://koalapic.com/en/492ms8ms9ms1st
https://koalapic.com/static/js/vendor/alpinejs-3.14.8.min.8ff95ecd7ce4.js241ms204ms4ms1st
Unattributable192ms6ms0ms1st
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.
A+
Page Weight Budget
168 KB transferred, 15 requests
PASS
168 KB transferred, 15 requests
Info::
Page weighs 517 KB (168 KB transferred)
Info::
15 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
168 KB / 2.4 MB budget
168 KB transferred
15 requests
0.03 g CO2 per page load
Fonts 71.4 KiB 42%
JavaScript 39.0 KiB 23%
HTML 33.0 KiB 20%
CSS 19.3 KiB 12%
Other 4.6 KiB 3%
Other 725 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+
Image Optimization
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (71 KB)
PASS
2 fonts (71 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

71 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s FCP 1.4 s LCP 1.5 shttps://koalapic.com/static/fonts/outfit-latin.fdf9c509a809.woff2outfit-latin.fdf9c509a8... https://koalapic.com/static/fonts/outfit-latin.fdf9c509a809.woff2 — 31.6 KiB — 26 ms — font-display: swaphttps://koalapic.com/static/fonts/jetbrains-mono-latin.b058178d7f30.woff2jetbrains-mono-latin.b0... https://koalapic.com/static/fonts/jetbrains-mono-latin.b058178d7f30.woff2 — 39.7 KiB — 30 ms — font-display: swap
outfit-latin.fdf9c509a8... woff2 swap
Size 32 KB
Load time 26 ms
Start 275 ms
Risk FOUT — text flashes from fallback to web font
jetbrains-mono-latin.b0... woff2 swap
Size 40 KB
Load time 30 ms
Start 276 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
JS Bundles
7 scripts, 0 KB unused
PASS
7 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://koalapic.com/en/jsi18n/2 KB—✓1st
https://koalapic.com/static/js/vendor/htmx-2.0.4.min.19a573773be4.js16 KB—✓1st
https://koalapic.com/static/js/vendor/htmx-ext-sse-2.2.4.c15f1a6b1be3.js3 KB—✓1st
https://koalapic.com/static/js/sw-register.282e4fa93825.js0 KB—✓1st
https://koalapic.com/static/js/vendor/alpinejs-collapse-3.14.8.min.9c8363b44f4f.js1 KB—✓1st
https://koalapic.com/static/js/vendor/alpinejs-intersect-3.14.8.min.e6545f3f0a31.js1 KB—✓1st
https://koalapic.com/static/js/vendor/alpinejs-3.14.8.min.8ff95ecd7ce4.js16 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
1
preload
1
dns-prefetch
—
prefetch
—

2 resource hints configured

A+
Compression Algorithm
Main response uses brotli
PASS
Main 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 max-age=300 (≤ 5min) is appropriate
PASS
Main HTML max-age=300 (≤ 5min) is appropriate
Info::
Main HTML max-age=300 (≤ 5min) is appropriate
Got: max-age=300
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
15 resources · 168 KB · 0 KB savings available
PASS
15 resources · 168 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 168 KB
15 resources · 168.0 KiB · 0 third-party Within 1MB page-weight target
Font 42% · 71.4 KiB
JavaScript 23% · 39.0 KiB
Document 20% · 33.0 KiB
CSS 12% · 19.3 KiB
Image 3% · 4.6 KiB
Other 0% · 725 B
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
3 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
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

A
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: max-age=300
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=300

DirectiveValueMeaning
max-age300Cache for 5 minutes
Effective TTL: 300 seconds
Network Waterfall
15 requests over 439ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.4 s LCP 1.5 shttps://koalapic.com/en//en/ https://koalapic.com/en/ — 200 — 33.0 KiB — 122 ms — h2https://koalapic.com/static/css/output.7ac7b2f4caf3.css/static/css/output.7ac7b2f4caf3.css https://koalapic.com/static/css/output.7ac7b2f4caf3.css — 200 — 19.3 KiB — 36 ms — h2https://koalapic.com/en/jsi18n//en/jsi18n/ https://koalapic.com/en/jsi18n/ — 200 — 1.9 KiB — 45 ms — h2https://koalapic.com/static/js/vendor/htmx-2.0.4.min.19a573773be4.js/static/js/vendor/htmx-2.0.4.min.19... https://koalapic.com/static/js/vendor/htmx-2.0.4.min.19a573773be4.js — 200 — 16.2 KiB — 28 ms — h2https://koalapic.com/static/js/vendor/htmx-ext-sse-2.2.4.c15f1a6b1be3.js/static/js/vendor/htmx-ext-sse-2.2.... https://koalapic.com/static/js/vendor/htmx-ext-sse-2.2.4.c15f1a6b1be3.js — 200 — 2.7 KiB — 31 ms — h2https://koalapic.com/static/js/sw-register.282e4fa93825.js/static/js/sw-register.282e4fa93825... https://koalapic.com/static/js/sw-register.282e4fa93825.js — 200 — 418 B — 33 ms — h2https://koalapic.com/static/site.webmanifest/static/site.webmanifest https://koalapic.com/static/site.webmanifest — 200 — 725 B — 65 ms — h2https://koalapic.com/static/js/vendor/alpinejs-collapse-3.14.8.min.9c8363b44f4f.js/static/js/vendor/alpinejs-collapse... https://koalapic.com/static/js/vendor/alpinejs-collapse-3.14.8.min.9c8363b44f4f.js — 200 — 901 B — 21 ms — h2https://koalapic.com/static/js/vendor/alpinejs-intersect-3.14.8.min.e6545f3f0a31.js/static/js/vendor/alpinejs-intersec... https://koalapic.com/static/js/vendor/alpinejs-intersect-3.14.8.min.e6545f3f0a31.js — 200 — 790 B — 21 ms — h2https://koalapic.com/static/js/vendor/alpinejs-3.14.8.min.8ff95ecd7ce4.js/static/js/vendor/alpinejs-3.14.8.m... https://koalapic.com/static/js/vendor/alpinejs-3.14.8.min.8ff95ecd7ce4.js — 200 — 16.1 KiB — 22 ms — h2https://koalapic.com/static/fonts/outfit-latin.fdf9c509a809.woff2/static/fonts/outfit-latin.fdf9c509... https://koalapic.com/static/fonts/outfit-latin.fdf9c509a809.woff2 — 200 — 31.6 KiB — 26 ms — h2https://koalapic.com/static/fonts/jetbrains-mono-latin.b058178d7f30.woff2/static/fonts/jetbrains-mono-latin.... https://koalapic.com/static/fonts/jetbrains-mono-latin.b058178d7f30.woff2 — 200 — 39.7 KiB — 30 ms — h2https://koalapic.com/static/images/favicon.ico/static/images/favicon.ico https://koalapic.com/static/images/favicon.ico — 200 — 1.2 KiB — 24 ms — h2https://koalapic.com/static/images/android-chrome-192x192.png/static/images/android-chrome-192x1... https://koalapic.com/static/images/android-chrome-192x192.png — 200 — 757 B — 23 ms — h2https://koalapic.com/static/images/favicon-32x32.png/static/images/favicon-32x32.png https://koalapic.com/static/images/favicon-32x32.png — 200 — 2.7 KiB — 21 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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