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Contrast Checker

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https://caddy.community

Performance

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

SCORE

77

GRADE

C

FIX

4

REVIEW

3

PASS

6

INFO

2

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

79

Performance

92

Accessibility

100

Best Practices

100

SEO

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

453 ms

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

453 ms

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

368 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.

2.30 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.

2.47 s

Page Load Progression

386 ms

772 ms

1.2 s

1.5 s

1.9 s

2.3 s

2.7 s

3.1 s

Checks

15

6 PASS 3 REVIEW 4 FIX

D

Page Weight Budget

Action

2.1 MB transferred, 122 requests

FIX

2.1 MB transferred, 122 requests

Page weighs 9.3 MB (2.1 MB transferred)

JavaScript is 1.8 MB — consider code splitting or lazy loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Got: 1.8 MB

122 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.44 g CO2 per page load

2.1 MB transferred

122 requests

0.44 g CO2 per page load

JavaScript 1.8 MiB 85%

CSS 173.7 KiB 8%

Images 62.5 KiB 3%

Fonts 39.9 KiB 2%

HTML 31.0 KiB 1%

Other 18.5 KiB 1%

Other 2.1 KiB 0%

Other 1.1 KiB 0%

Other 549 B 0%

0 2.4 MB 4.9 MB

Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

F

JS Bundles

Action

32 scripts, 923 KB unused

FIX

32 scripts, 923 KB unused

https://caddy.community/assets/chunk.b82c8d6171ac7...: 682 KB unused (62%)

Consider code splitting or tree shaking to reduce unused code.

https://caddy.community/assets/plugins/chat-f1ce4c...: 74 KB unused (65%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=UA-865...: 63 KB unused (50%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtag/js?id=G-CGTR...: 63 KB unused (43%)

Consider code splitting or tree shaking to reduce unused code.

https://caddy.community/assets/plugins/discourse-c...: 42 KB unused (89%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 923 KB

923 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://caddy.community/assets/chunk.b82c8d6171ac786a02ad.d41d8cd9.js	1108 KB	682 KB (62%)	✓	1st
https://caddy.community/assets/plugins/chat-f1ce4c45.js	113 KB	74 KB (65%)	✓	1st
https://www.googletagmanager.com/gtag/js?id=UA-86578-25	125 KB	63 KB (50%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=G-CGTREW0SQP&cx=c&gtm=4e64k1	146 KB	63 KB (43%)	✓	3rd
https://caddy.community/assets/plugins/discourse-custom-wizard-f41bc0d8.js	47 KB	42 KB (89%)	✓	1st
https://caddy.community/assets/plugins/discourse-lazy-videos-da0156f3.js	2 KB	—	✓	1st
https://caddy.community/assets/plugins/discourse-presence-f0c39f4a.js	2 KB	—	✓	1st
https://caddy.community/assets/vendor.0af4d4d8af23e6be09ced889cef1534e-071a296a.js	2 KB	—	✓	1st
https://caddy.community/theme-javascripts/bf8d424a683ad48f5c34e0e2d56e1396729d0ff8.js?__ws=caddy.community	1 KB	—	✓	1st
https://caddy.community/assets/chunk.b59599819c0ca27f1dab.d41d8cd9.js	12 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

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

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

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

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

D

Page Weight Inventory

Action

122 resources · 2.1 MB · 923 KB savings available

FIX

122 resources · 2.1 MB · 923 KB savings available

Page weight 1.1 MB over 1MB target

Got: 2.1 MB Expected: ≤ 1 MB

~923 KB of savings available

9 third-party resources (16% of weight)

1 resources over 200KB

122 resources · 2.1 MiB · 9 third-party 1.1 MiB over 1MB target

JavaScript 85% · 1.8 MiB

CSS 8% · 173.7 KiB

Image 4% · 81.0 KiB

Font 2% · 39.9 KiB

Document 1% · 31.0 KiB

Other 0% · 3.7 KiB

~922.8 KiB of savings available

Remove unused JavaScript: 922.8 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

122 resources			2.1 MiB

D

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: no-cache, no-store

No ETag or Last-Modified header

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

Cache-Control

no-cache, no-store

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response

B

Image Optimization

46 images, 0 KB saveable

REVIEW

46 images, 0 KB saveable

https://dqah5woojdp50.cloudfront.net/original/2X/2... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

46 images 62 KB

0 oversized -0 KB

45 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

C

JS Execution Cost

Action

1250ms total JS execution

REVIEW

1250ms total JS execution

https://caddy.community/assets/chunk.b82c8d6171ac7...: 626ms CPU time

Unattributable: 288ms CPU time

https://caddy.community/assets/start-discourse-6f0...: 196ms CPU time

https://caddy.community/: 141ms CPU time

Third-party scripts: 288ms (23% of total)

Main Thread Breakdown

Script Evaluation 52% Other 21% Script Parsing & Compilation 10% Style & Layout 6% Garbage Collection 5% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://caddy.community/assets/chunk.b82c8d6171ac786a02ad.d41d8cd9.js	626ms	441ms	98ms	1st
Unattributable	288ms	25ms	0ms	3rd
https://caddy.community/assets/start-discourse-6f03a463.js	196ms	187ms	0ms	1st
https://caddy.community/	141ms	1ms	0ms	1st

C

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Third-Party Impact

16% third-party, 0 ms blocking

PASS

16% third-party, 0 ms blocking

Third-party code accounts for 16% of page weight (338.5 KiB of 2.1 MiB)

Third-party blocking time is low (0 ms)

84%

16%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

3 fonts (40 KB)

PASS

3 fonts (40 KB)

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

Web fonts

3

40 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

Nunito-Regular.woff2 woff2 swap

Size 16 KB

Load time 181 ms

Start 1.7 s

Risk FOUT — text flashes from fallback to web font

Nunito-Bold.woff2 woff2 swap

Size 16 KB

Load time 244 ms

Start 2.7 s

Risk FOUT — text flashes from fallback to web font

Poppins-Bold.woff2 woff2 swap

Size 8 KB

Load time 225 ms

Start 2.7 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+

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

No optimization needed

PASS

No optimization needed

No resource hint issues

Network Waterfall

122 requests over 28561ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

23% of JavaScript execution is third-party

First-party Third-party 288ms · 0KB · $4/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	288ms	0 KB	—	$4/mo	Costly

Unattributable

Other

Costly

Execution 288ms

Transfer 0 KB

Monthly Cost $4/mo

These scripts may cost more than they're worth

Unattributable adds 288ms and costs ~$4/month

Unattributable takes 288ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

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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