Performance

· 26 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Performance

Accessibility

Best Practices

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

2.61 s

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

3.70 s

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

291 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.

2.61 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.

3.77 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

21 PASS 1 REVIEW 1 FIX

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: private, no-cache, no-store, max-age=0, must-revalidate

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

private, no-cache, no-store, max-age=0, must-revalidate

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

JS Execution Cost

Action

1862ms total JS execution

REVIEW

1862ms total JS execution

https://balford.net/: 535ms CPU time

https://balford.net/cdn-cgi/challenge-platform/scr...: 425ms CPU time

https://balford.net/_next/static/chunks/1255-73c62...: 318ms CPU time

Unattributable: 278ms CPU time

https://balford.net/_next/static/chunks/webpack-f0...: 210ms CPU time

Main Thread Breakdown

Script Evaluation 49% Other 20% Style & Layout 15% Parse HTML & CSS 7% Script Parsing & Compilation 5%

Script	Total	Scripting	Parse/Compile	Party
https://balford.net/	535ms	93ms	41ms	1st
https://balford.net/cdn-cgi/challenge-platform/scripts/jsd/main.js	425ms	396ms	3ms	1st
https://balford.net/_next/static/chunks/1255-73c62fd077d3c0f5.js	318ms	248ms	18ms	1st
Unattributable	278ms	6ms	0ms	1st
https://balford.net/_next/static/chunks/webpack-f0efa5c5157d732d.js	210ms	207ms	2ms	1st
https://balford.net/_next/static/css/88df5d63b4f9d5e9.css	97ms	0ms	0ms	1st

A+

Page Weight Budget

448 KB transferred, 31 requests

PASS

448 KB transferred, 31 requests

Page weighs 1.4 MB (448 KB transferred)

31 HTTP requests

Estimated 0.09 g CO2 per page load

448 KB transferred

31 requests

0.09 g CO2 per page load

JavaScript 134.2 KiB 30%

Images 134.1 KiB 30%

CSS 116.3 KiB 26%

HTML 37.5 KiB 8%

Fonts 23.0 KiB 5%

Other 1.6 KiB 0%

Other 1.0 KiB 0%

0 2.4 MB 4.9 MB

Under budget

A+

Third-Party Impact

No third-party resources

PASS

No third-party resources

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

All text resources are properly compressed.

Image Optimization

3 images, 0 KB saveable

PASS

3 images, 0 KB saveable

is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://balford.net/media/2024/07/solenoid-valve-h... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

3 images 134 KB

0 oversized -0 KB

1 legacy format

2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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+

Font Loading

4 fonts (23 KB)

PASS

4 fonts (23 KB)

4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

23 KB total

Render-blocking

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

font-woff;charset=utf-8... unknown swap

Size 0 KB

Load time 0 ms

Start 238 ms

Risk FOUT — text flashes from fallback to web font

roboto-condensed-v27-la... woff2 swap

Size 21 KB

Load time 18 ms

Start 267 ms

Risk FOUT — text flashes from fallback to web font

roboto-condensed-v27-la... woff2 swap

Size 1 KB

Load time 21 ms

Start 900 ms

Risk FOUT — text flashes from fallback to web font

roboto-condensed-v27-la... woff2 swap

Size 1 KB

Load time 20 ms

Start 925 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

12 scripts, 21 KB unused

PASS

12 scripts, 21 KB unused

https://balford.net/_next/static/chunks/1255-73c62...: 21 KB unused (47%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 21 KB

21 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://balford.net/_next/static/chunks/1255-73c62fd077d3c0f5.js	46 KB	21 KB (47%)	✓	1st
https://balford.net/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js	1 KB	—	✓	1st
https://balford.net/_next/static/chunks/webpack-f0efa5c5157d732d.js	2 KB	—	✓	1st
https://balford.net/_next/static/chunks/4bd1b696-f785427dddbba9fb.js	54 KB	—	✓	1st
https://balford.net/_next/static/chunks/main-app-12169172f6dfbe91.js	1 KB	—	✓	1st
https://balford.net/_next/static/chunks/app/layout-db8aef65aa1a9114.js	7 KB	—	✓	1st
https://balford.net/_next/static/chunks/app/not-found-c1c528898c9b7f01.js	2 KB	—	✓	1st
https://balford.net/_next/static/chunks/app/page-5d333636d659f71f.js	1 KB	—	✓	1st
https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495	0 KB	—	✓	3rd
https://balford.net/cdn-cgi/challenge-platform/h/g/scripts/jsd/330e41bb475c/main.js?	10 KB	—	✓	1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

2 hints, 0 missing preconnects

PASS

2 hints, 0 missing preconnects

Page uses 2 resource hint(s)

Current Resource Hints

preconnect

—

preload

dns-prefetch

—

prefetch

—

2 resource hints configured

A+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

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

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

LCP image preload audit not available for this scan

A+

Main HTML Cache-Control

Main HTML uses no-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: private, no-cache, no-store, max-age=0, must-revalidate

A+

Server-Timing Observability

3 Server-Timing entries advertised

PASS

3 Server-Timing entries advertised

Server-Timing header advertises 3 timing entries

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch,...

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).

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

31 resources · 448 KB · 21 KB savings available

PASS

31 resources · 448 KB · 21 KB savings available

Within 1MB page-weight target

Got: 448 KB

3 third-party resources (0% of weight)

31 resources · 447.7 KiB · 3 third-party Within 1MB page-weight target

Image 30% · 135.4 KiB

JavaScript 30% · 134.2 KiB

CSS 26% · 116.3 KiB

Document 8% · 37.5 KiB

Font 5% · 23.0 KiB

Other 0% · 1.3 KiB

~21.3 KiB of savings available

Remove unused JavaScript: 21.3 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

31 resources			447.7 KiB

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

JavaScript Blocking

1 JS blocking issue(s) detected

PASS

1 JS blocking issue(s) detected

1 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

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

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

31 requests over 945ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Image Optimization

15 images, 479 KB total, 68 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

479 KB

Oversized

Wasted

68 KB

15 missing dimensions 3 missing lazy loading

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.