Performance

· 14 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

Mobile Desktop

Performance

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.

1.59 s

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

4.09 s

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

749 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.

1.68 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.

5.77 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

8 PASS 3 REVIEW 1 FIX

JS Execution Cost

Action

3599ms total JS execution

FIX

3599ms total JS execution

https://docusaurus.io/assets/js/main.59adb867.js: 1341ms CPU time

https://docusaurus.io/: 999ms CPU time

Unattributable: 721ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-E5CR...: 487ms CPU time

https://static.cloudflareinsights.com/beacon.min.j...: 51ms CPU time

Third-party scripts: 1259ms (35% of total)

Main Thread Breakdown

Script Evaluation 40% Other 25% Style & Layout 17% Script Parsing & Compilation 9% Rendering 4%

Script	Total	Scripting	Parse/Compile	Party
https://docusaurus.io/assets/js/main.59adb867.js	1341ms	994ms	174ms	1st
https://docusaurus.io/	999ms	36ms	4ms	1st
Unattributable	721ms	11ms	0ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-E5CR2Q1NRE	487ms	349ms	134ms	3rd
https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516	51ms	35ms	6ms	3rd

Image Optimization

16 images, 0 KB saveable

REVIEW

16 images, 0 KB saveable

https://docusaurus.io/img/meta_opensource_logo_neg... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

16 images 119 KB

0 oversized -0 KB

12 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

JS Bundles

22 scripts, 112 KB unused

REVIEW

22 scripts, 112 KB unused

https://www.googletagmanager.com/gtag/js?id=G-E5CR...: 65 KB unused (42%)

Consider code splitting or tree shaking to reduce unused code.

https://docusaurus.io/assets/js/main.59adb867.js: 47 KB unused (20%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 112 KB

112 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtag/js?id=G-E5CR2Q1NRE	154 KB	65 KB (42%)	✓	3rd
https://docusaurus.io/assets/js/main.59adb867.js	238 KB	47 KB (20%)	✓	1st
https://docusaurus.io/assets/js/ccc49370.35534343.js	21 KB	—	✓	1st
https://docusaurus.io/assets/js/acecf23e.415212bb.js	1 KB	—	✓	1st
https://api.github.com/repos/facebook/docusaurus?callback=callback	3 KB	—	✓	3rd
https://docusaurus.io/assets/js/81457.e8822172.js	3 KB	—	✓	1st
https://docusaurus.io/assets/js/1df93b7f.dd3ca37b.js	14 KB	—	✓	1st
https://docusaurus.io/assets/js/a7456010.ec36ca5f.js	1 KB	—	✓	1st
https://docusaurus.io/assets/js/1df93b7f.dd3ca37b.js	0 KB	—	✓	1st
https://docusaurus.io/assets/js/a7456010.ec36ca5f.js	0 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

HTTP Caching

public,max-age=0,must-revalidate

REVIEW

public,max-age=0,must-revalidate

Cache-Control header is set

Got: public,max-age=0,must-revalidate

No ETag or Last-Modified header

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

Cache-Control

public,max-age=0,must-revalidate

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

Page Weight Budget

712 KB transferred, 50 requests

PASS

712 KB transferred, 50 requests

Page weighs 2.2 MB (712 KB transferred)

50 HTTP requests

Estimated 0.15 g CO2 per page load

712 KB transferred

50 requests

0.15 g CO2 per page load

JavaScript 458.3 KiB 64%

Images 118.5 KiB 17%

Other 83.4 KiB 12%

CSS 35.7 KiB 5%

HTML 14.2 KiB 2%

Other 881 B 0%

Other 546 B 0%

Other 450 B 0%

0 2.4 MB 4.9 MB

Under budget

Third-Party Impact

33% third-party, 0 ms blocking

PASS

33% third-party, 0 ms blocking

Third-party code accounts for 33% of page weight (234.5 KiB of 711.9 KiB)

Third-party blocking time is low (0 ms)

67%

33%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

No web fonts (system fonts)

PASS

No web fonts (system fonts)

No web fonts loaded — system fonts are fastest

No web fonts loaded — system fonts are optimal.

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

14 hints, 0 missing preconnects

PASS

14 hints, 0 missing preconnects

Page uses 14 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

—

prefetch

14 resource hints configured

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

Network Waterfall

50 requests over 0ms

INFO

Performance analysis not available for this result.

Third-Party Script Cost

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

INFO

35% of JavaScript execution is third-party

First-party Third-party 1259ms · 165KB · $17/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	721ms	0 KB	—	$10/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	487ms	154 KB	42%	$6/mo	Costly
static.cloudflareinsights.com static.cloudflareinsights.com	Other	51ms	11 KB	—	$1/mo	Optional

Unattributable

Other

Costly

Execution 721ms

Transfer 0 KB

Monthly Cost $10/mo

Google Tag Manager

Tag Manager

Costly

Execution 487ms

Transfer 154 KB

Unused 42%

Monthly Cost $6/mo

static.cloudflareinsights.com

Other

Optional

Execution 51ms

Transfer 11 KB

Monthly Cost $1/mo

These scripts may cost more than they're worth

Unattributable adds 721ms and costs ~$10/month
Google Tag Manager adds 487ms and costs ~$6/month

Unattributable takes 721ms 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

Google Tag Manager takes 487ms 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.

Browse & Analyze

Learn

Performance

Page Load Progression

Green Hosting

These scripts may cost more than they're worth