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https://emanuelpina.pt

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
94
GRADE
A
FIX
2
REVIEW
3
PASS
18
INFO
2

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

Mobile Desktop
95
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.

1.83 s

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

2.73 s

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.

2.55 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.

2.73 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
25
18 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
98% third-party, 0 ms blocking
FIX
98% third-party, 0 ms blocking
Warning::
Third-party code accounts for 98% of page weight (238.8 KiB of 243.1 KiB)
Info::
Third-party blocking time is low (0 ms)
98%
First-party Third-party
D
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Compression Algorithm
Main response uses gzip; brotli would be ~20% smaller
REVIEW
Main response uses gzip; brotli would be ~20% smaller
Info::
Main HTML response uses gzip (brotli would be ~20% smaller)
All current browsers support brotli. Most CDNs (Cloudflare, Fastly, AWS CloudFront, Vercel, Netlify) can switch from gzip to brotli with a single config flag. Origin servers (nginx, Apache) need a brotli module compiled in -- nginx-brotli or Apache mod_brotli.
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
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
243 KB transferred, 8 requests
PASS
243 KB transferred, 8 requests
Info::
Page weighs 258 KB (243 KB transferred)
Info::
8 HTTP requests
Info::
Estimated 0.05 g CO2 per page load
243 KB / 2.4 MB budget
243 KB transferred
8 requests
0.05 g CO2 per page load
Images 189.9 KiB 78%
Fonts 41.1 KiB 17%
CSS 6.4 KiB 3%
HTML 4.3 KiB 2%
Other 1.4 KiB 1%
0 2.4 MB 4.9 MB
Under budget
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
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Warning::
https://cdn.emanuelpina.pt/media/pages/notes/2025-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
2 images 190 KB
0 oversized -0 KB
0 legacy format
1 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

A+
JS Execution Cost
300ms total JS execution
PASS
300ms total JS execution
Info::
https://emanuelpina.pt/: 169ms CPU time
Info::
Unattributable: 131ms CPU time

Main Thread Breakdown

Style & Layout 45% Other 44% Rendering 4% Script Evaluation 4%
ScriptTotalScriptingParse/CompileParty
https://emanuelpina.pt/169ms4ms0ms1st
Unattributable131ms5ms0ms1st
A+
Font Loading
3 fonts (41 KB)
PASS
3 fonts (41 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

41 KB total

Render-blocking

0

of 3

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 2.0 s 2.5 s FCP 1.8 s LCP 2.7 shttps://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Bold.woff2AtkinsonHyperlegibleNex... https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Bold.woff2 — 13.5 KiB — 123 ms — font-display: swaphttps://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Regular.woff2AtkinsonHyperlegibleNex... https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Regular.woff2 — 12.8 KiB — 127 ms — font-display: swaphttps://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Regular-Italic.woff2AtkinsonHyperlegibleNex... https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Regular-Italic.woff2 — 14.8 KiB — 111 ms — font-display: swap
AtkinsonHyperlegibleNex... woff2 swap
Size 13 KB
Load time 123 ms
Start 373 ms
Risk FOUT — text flashes from fallback to web font
AtkinsonHyperlegibleNex... woff2 swap
Size 13 KB
Load time 127 ms
Start 373 ms
Risk FOUT — text flashes from fallback to web font
AtkinsonHyperlegibleNex... woff2 swap
Size 15 KB
Load time 111 ms
Start 373 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
No JavaScript
PASS
No JavaScript
Info::
No JavaScript bundles
No JavaScript files loaded.
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+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
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+
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::
Both `ETag` and `Last-Modified` present -- efficient revalidation supported
The page returns both `ETag` (content hash) and `Last-Modified` (timestamp) headers. Browsers can issue conditional GETs with `If-None-Match` or `If-Modified-Since`; the server returns 304 Not Modified for unchanged content, saving bandwidth. ETag is the more reliable of the two (timestamps fail in DST transitions and clock skew).
A
Page Weight Inventory
8 resources · 243 KB · 0 KB savings available
PASS
8 resources · 243 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 243 KB
Warning::
7 third-party resources (98% of weight)
8 resources · 243.1 KiB · 7 third-party Within 1MB page-weight target
Image 79% · 191.3 KiB
Font 17% · 41.1 KiB
CSS 3% · 6.4 KiB
Document 2% · 4.3 KiB
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
No render-blocking JS or document.write usage detected
PASS
No render-blocking JS or document.write usage detected
Info::
No JavaScript blocking issues detected
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: Hetzner Online GmbH

Network Waterfall
8 requests over 500ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.8 s LCP 2.7 shttps://emanuelpina.pt// https://emanuelpina.pt/ — 200 — 4.3 KiB — 103 ms — h2https://cdn.emanuelpina.pt/assets/css/base.6952c91c.csscdn.emanuelpina.pt/assets/css/base.... https://cdn.emanuelpina.pt/assets/css/base.6952c91c.css — 200 — 6.4 KiB — 146 ms — h2https://cdn.emanuelpina.pt/media/site/ad87a9592a-1743614745/avatar-100x100-crop-67-3-44-1-q90.webpcdn.emanuelpina.pt/media/site/ad87a... https://cdn.emanuelpina.pt/media/site/ad87a9592a-1743614745/avatar-100x100-crop-67-3-44-1-q90.webp — 200 — 5.4 KiB — 149 ms — h2https://cdn.emanuelpina.pt/media/pages/notes/2025-12-30-1810/cd47a65f15-1767119769/enjoy-while-you-can-q90.webpcdn.emanuelpina.pt/media/pages/note... https://cdn.emanuelpina.pt/media/pages/notes/2025-12-30-1810/cd47a65f15-1767119769/enjoy-while-you-can-q90.webp — 200 — 184.5 KiB — 225 ms — h2https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Bold.woff2cdn.emanuelpina.pt/assets/fonts/Atk... https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Bold.woff2 — 200 — 13.5 KiB — 123 ms — h2https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Regular.woff2cdn.emanuelpina.pt/assets/fonts/Atk... https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Regular.woff2 — 200 — 12.8 KiB — 127 ms — h2https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Regular-Italic.woff2cdn.emanuelpina.pt/assets/fonts/Atk... https://cdn.emanuelpina.pt/assets/fonts/AtkinsonHyperlegibleNext-Regular-Italic.woff2 — 200 — 14.8 KiB — 111 ms — h2https://cdn.emanuelpina.pt/assets/icons/favicon.6676e426.svgcdn.emanuelpina.pt/assets/icons/fav... https://cdn.emanuelpina.pt/assets/icons/favicon.6676e426.svg — 200 — 1.4 KiB — 33 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
2 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

2

Total Size

0 KB

2 missing dimensions 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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