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Performance

· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
96
GRADE
A
FIX
0
REVIEW
2
PASS
17
INFO
3

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.
100
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.

644 ms

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

775 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.

679 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.

777 ms

Page Load Progression

403 ms
806 ms
1.2 s
1.6 s
2.0 s
2.4 s
2.8 s
3.2 s
Checks
22
17 PASS 2 REVIEW
B
JS Execution Cost
670ms total JS execution
REVIEW
670ms total JS execution
Warning::
https://adamnordling.se/: 515ms CPU time
Info::
Unattributable: 156ms CPU time

Main Thread Breakdown

Other 41% Style & Layout 37% Script Evaluation 11% Rendering 7% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://adamnordling.se/515ms13ms1ms1st
Unattributable156ms2ms0ms1st
B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
A+
Page Weight Budget
80 KB transferred, 9 requests
PASS
80 KB transferred, 9 requests
Info::
Page weighs 243 KB (80 KB transferred)
Info::
9 HTTP requests
Info::
Estimated 0.02 g CO2 per page load
80 KB / 2.4 MB budget
80 KB transferred
9 requests
0.02 g CO2 per page load
JavaScript 30.6 KiB 38%
HTML 23.9 KiB 30%
Images 12.4 KiB 16%
Other 11.2 KiB 14%
Other 1.5 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
4 images, 0 KB saveable
PASS
4 images, 0 KB saveable
Info::
All images are well-optimized
4 images 12 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
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, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://adamnordling.se/assets/index-DEfFcw_-.js31 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+
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+
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 max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, must-revalidate
A+
Server-Timing Observability
1 Server-Timing entries advertised
PASS
1 Server-Timing entries advertised
Info::
Server-Timing header advertises 1 timing entries
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
9 resources · 80 KB · 0 KB savings available
PASS
9 resources · 80 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 80 KB
9 resources · 79.5 KiB · 0 third-party Within 1MB page-weight target
JavaScript 38% · 30.6 KiB
Document 30% · 23.9 KiB
Image 30% · 23.6 KiB
Other 2% · 1.5 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: Cloudflare

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
9 requests over 900ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 644 ms LCP 775 mshttps://adamnordling.se// https://adamnordling.se/ — 200 — 23.9 KiB — 241 ms — h3https://adamnordling.se/assets/profile-300.webp/assets/profile-300.webp https://adamnordling.se/assets/profile-300.webp — 200 — 5.6 KiB — 165 ms — h3https://adamnordling.se/assets/index-DEfFcw_-.js/assets/index-DEfFcw_-.js https://adamnordling.se/assets/index-DEfFcw_-.js — 200 — 30.6 KiB — 197 ms — h3https://adamnordling.se/manifest.webmanifest/manifest.webmanifest https://adamnordling.se/manifest.webmanifest — 200 — 1.5 KiB — 109 ms — h3https://adamnordling.se/assets/svg/trajectory.svg/assets/svg/trajectory.svg https://adamnordling.se/assets/svg/trajectory.svg — 200 — 1.6 KiB — 177 ms — h3https://adamnordling.se/assets/svg/nutrition.svg/assets/svg/nutrition.svg https://adamnordling.se/assets/svg/nutrition.svg — 200 — 2.1 KiB — 181 ms — h3https://adamnordling.se/assets/svg/everything.svg?v=2/assets/svg/everything.svg?v=2 https://adamnordling.se/assets/svg/everything.svg?v=2 — 200 — 3.1 KiB — 317 ms — h3https://adamnordling.se/favicon.ico/favicon.ico https://adamnordling.se/favicon.ico — 200 — 4.2 KiB — 160 ms — h3https://adamnordling.se/assets/favicons/android-chrome-192x192.png/assets/favicons/android-chrome-192... https://adamnordling.se/assets/favicons/android-chrome-192x192.png — 200 — 7.0 KiB — 251 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
4 images, 6 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

4

Total Size

6 KB

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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