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https://tomdawayhet.com

Performance

· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
4
PASS
13
INFO
2

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

Mobile Desktop
87
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.

1.37 s

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

1.64 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.

1.80 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.

1.64 s

Page Load Progression

396 ms
793 ms
1.2 s
1.6 s
2.0 s
2.4 s
2.8 s
3.2 s
Checks
21
13 PASS 4 REVIEW 2 FIX
D
Third-Party Impact
Action
90% third-party, 0 ms blocking
FIX
90% third-party, 0 ms blocking
Warning::
Third-party code accounts for 90% of page weight (678.9 KiB of 757.2 KiB)
Info::
Third-party blocking time is low (0 ms)
90%
First-party Third-party
F
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.

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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
757 KB transferred, 17 requests
PASS
757 KB transferred, 17 requests
Info::
Page weighs 1.4 MB (757 KB transferred)
Info::
17 HTTP requests
Info::
Estimated 0.16 g CO2 per page load
757 KB / 2.4 MB budget
757 KB transferred
17 requests
0.16 g CO2 per page load
Images 506.2 KiB 67%
Fonts 160.0 KiB 21%
CSS 70.7 KiB 9%
Other 9.4 KiB 1%
HTML 7.3 KiB 1%
JavaScript 2.9 KiB 0%
Other 630 B 0%
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
6 images, 0 KB saveable
PASS
6 images, 0 KB saveable
Info::
All images are well-optimized
6 images 506 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
328ms total JS execution
PASS
328ms total JS execution
Info::
https://tomdawayhet.com/: 246ms CPU time
Info::
Unattributable: 82ms CPU time

Main Thread Breakdown

Other 52% Style & Layout 35% Rendering 7% Parse HTML & CSS 3% Script Evaluation 3%
ScriptTotalScriptingParse/CompileParty
https://tomdawayhet.com/246ms3ms0ms1st
Unattributable82ms2ms0ms1st
A+
Font Loading
4 fonts (160 KB)
PASS
4 fonts (160 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

160 KB total

Render-blocking

0

of 4

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 FCP 1.4 s LCP 1.6 shttps://fonts.tomdawayhet.com/mluvka/Mluvka-Bold-web.woff2Mluvka-Bold-web.woff2 https://fonts.tomdawayhet.com/mluvka/Mluvka-Bold-web.woff2 — 40.2 KiB — 518 ms — font-display: swaphttps://fonts.tomdawayhet.com/mluvka/Mluvka-Medium-web.woff2Mluvka-Medium-web.woff2 https://fonts.tomdawayhet.com/mluvka/Mluvka-Medium-web.woff2 — 39.8 KiB — 528 ms — font-display: swaphttps://fonts.tomdawayhet.com/mluvka/Mluvka-Regular-web.woff2Mluvka-Regular-web.woff2 https://fonts.tomdawayhet.com/mluvka/Mluvka-Regular-web.woff2 — 39.8 KiB — 689 ms — font-display: swaphttps://fonts.tomdawayhet.com/mluvka/Mluvka-SemiBold-web.woff2Mluvka-SemiBold-web.woff2 https://fonts.tomdawayhet.com/mluvka/Mluvka-SemiBold-web.woff2 — 40.2 KiB — 693 ms — font-display: swap
Mluvka-Bold-web.woff2 woff2 swap
Size 40 KB
Load time 518 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
Mluvka-Medium-web.woff2 woff2 swap
Size 40 KB
Load time 528 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
Mluvka-Regular-web.woff2 woff2 swap
Size 40 KB
Load time 689 ms
Start 1.5 s
Risk FOUT — text flashes from fallback to web font
Mluvka-SemiBold-web.woff2 woff2 swap
Size 40 KB
Load time 693 ms
Start 1.5 s
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
1 scripts, 0 KB unused
PASS
1 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://js.tomdawayhet.com/main.js?457829d75764ad1319710cc6fce18d753 KB—✓3rd
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::
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
17 resources · 757 KB · 0 KB savings available
PASS
17 resources · 757 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 757 KB
Warning::
14 third-party resources (90% of weight)
17 resources · 757.2 KiB · 14 third-party Within 1MB page-weight target
Image 68% · 515.6 KiB
Font 21% · 160.0 KiB
CSS 9% · 70.7 KiB
Document 1% · 7.3 KiB
JavaScript 0% · 2.9 KiB
Other 0% · 630 B
Network Waterfall
17 requests over 2443ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.4 s LCP 1.6 shttps://tomdawayhet.com// https://tomdawayhet.com/ — 200 — 7.3 KiB — 681 ms — h2https://fonts.tomdawayhet.com/mluvka/font.cssfonts.tomdawayhet.com/mluvka/font.c... https://fonts.tomdawayhet.com/mluvka/font.css — 200 — 316 B — 244 ms — h2https://tomdawayhet.com/css//css/ https://tomdawayhet.com/css/ — 200 — 70.4 KiB — 694 ms — h2https://audio.tomdawayhet.com/releases/call-it-funky.mp3audio.tomdawayhet.com/releases/call... https://audio.tomdawayhet.com/releases/call-it-funky.mp3 — 200 — 3.8 KiB — 556 ms — h2https://js.tomdawayhet.com/main.js?457829d75764ad1319710cc6fce18d75js.tomdawayhet.com/main.js?457829d7... https://js.tomdawayhet.com/main.js?457829d75764ad1319710cc6fce18d75 — 200 — 2.9 KiB — 734 ms — h2https://tomdawayhet.com/site.webmanifest/site.webmanifest https://tomdawayhet.com/site.webmanifest — 200 — 630 B — 364 ms — h3https://img.tomdawayhet.com/tom-da-wayhet-landscape.webpimg.tomdawayhet.com/tom-da-wayhet-l... https://img.tomdawayhet.com/tom-da-wayhet-landscape.webp — 200 — 64.0 KiB — 522 ms — h2https://img.tomdawayhet.com/releases/call-it-funky.webpimg.tomdawayhet.com/releases/call-i... https://img.tomdawayhet.com/releases/call-it-funky.webp — 200 — 92.9 KiB — 448 ms — h2https://img.tomdawayhet.com/releases/alien-salsa.webpimg.tomdawayhet.com/releases/alien-... https://img.tomdawayhet.com/releases/alien-salsa.webp — 200 — 155.2 KiB — 400 ms — h2https://img.tomdawayhet.com/releases/run.webpimg.tomdawayhet.com/releases/run.we... https://img.tomdawayhet.com/releases/run.webp — 200 — 71.1 KiB — 360 ms — h2https://img.tomdawayhet.com/releases/summer-trip.webpimg.tomdawayhet.com/releases/summer... https://img.tomdawayhet.com/releases/summer-trip.webp — 200 — 119.3 KiB — 427 ms — h2https://fonts.tomdawayhet.com/mluvka/Mluvka-Bold-web.woff2fonts.tomdawayhet.com/mluvka/Mluvka... https://fonts.tomdawayhet.com/mluvka/Mluvka-Bold-web.woff2 — 200 — 40.2 KiB — 518 ms — h3https://fonts.tomdawayhet.com/mluvka/Mluvka-Medium-web.woff2fonts.tomdawayhet.com/mluvka/Mluvka... https://fonts.tomdawayhet.com/mluvka/Mluvka-Medium-web.woff2 — 200 — 39.8 KiB — 528 ms — h3https://fonts.tomdawayhet.com/mluvka/Mluvka-Regular-web.woff2fonts.tomdawayhet.com/mluvka/Mluvka... https://fonts.tomdawayhet.com/mluvka/Mluvka-Regular-web.woff2 — 200 — 39.8 KiB — 689 ms — h3https://fonts.tomdawayhet.com/mluvka/Mluvka-SemiBold-web.woff2fonts.tomdawayhet.com/mluvka/Mluvka... https://fonts.tomdawayhet.com/mluvka/Mluvka-SemiBold-web.woff2 — 200 — 40.2 KiB — 693 ms — h3https://icons.tomdawayhet.com/favicon-light.svg?457829d75764ad1319710cc6fce18d75icons.tomdawayhet.com/favicon-light... https://icons.tomdawayhet.com/favicon-light.svg?457829d75764ad1319710cc6fce18d75 — 200 — 528 B — 258 ms — h2https://icons.tomdawayhet.com/favicon-192x192.pngicons.tomdawayhet.com/favicon-192x1... https://icons.tomdawayhet.com/favicon-192x192.png — 200 — 8.9 KiB — 240 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
5 images, 0 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

5

Total Size

0 KB

5 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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