Performance

· 17 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.

2.51 s

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

2.86 s

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

3 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.

2.51 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.

3.35 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

12 PASS 1 REVIEW 2 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (64.5 KiB of 64.8 KiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

HTTP Caching

Action

No cache headers

FIX

No cache headers

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.

JS Execution Cost

757ms total JS execution

REVIEW

757ms total JS execution

https://www.addtoany.com/: 421ms CPU time

Unattributable: 255ms CPU time

https://static.addtoany.com/menu/modules/core.ydpp...: 81ms CPU time

Third-party scripts: 757ms (100% of total)

Main Thread Breakdown

Other 46% Style & Layout 27% Script Evaluation 15% Rendering 7% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://www.addtoany.com/	421ms	24ms	4ms	3rd
Unattributable	255ms	9ms	0ms	3rd
https://static.addtoany.com/menu/modules/core.ydpp7jcu.js	81ms	55ms	0ms	3rd

A+

Page Weight Budget

65 KB transferred, 31 requests

PASS

65 KB transferred, 31 requests

Page weighs 214 KB (65 KB transferred)

31 HTTP requests

Estimated 0.01 g CO2 per page load

65 KB transferred

31 requests

0.01 g CO2 per page load

JavaScript 36.4 KiB 56%

CSS 17.0 KiB 26%

HTML 8.6 KiB 13%

Other 1.8 KiB 3%

Images 1.0 KiB 2%

0 2.4 MB 4.9 MB

Under budget

A+

Text Compression

All text resources are compressed

PASS

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

All images are well-optimized

4 images 1 KB

0 oversized -0 KB

1 legacy format

0 missing dimensions CLS risk

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+

JS Bundles

10 scripts, 0 KB unused

PASS

10 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.addtoany.com/js/prefetch.1.min.js	1 KB	—	✓	3rd
https://www.addtoany.com/js/transition.2.min.js	1 KB	—	✓	3rd
https://static.addtoany.com/menu/page.js	2 KB	—	✓	3rd
https://static.addtoany.com/menu/modules/core.ydpp7jcu.js	26 KB	—	✓	3rd
https://static.addtoany.com/menu/svg/icons/facebook.js	1 KB	—	✓	3rd
https://static.addtoany.com/menu/svg/icons/pinterest.js	1 KB	—	✓	3rd
https://static.addtoany.com/menu/svg/icons/bluesky.js	1 KB	—	✓	3rd
https://static.addtoany.com/menu/svg/icons/mastodon.js	1 KB	—	✓	3rd
https://static.addtoany.com/menu/svg/icons/whatsapp.js	1 KB	—	✓	3rd
https://static.addtoany.com/menu/svg/icons/threads.js	1 KB	—	✓	3rd

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

Page Weight Inventory

31 resources · 65 KB · 0 KB savings available

PASS

31 resources · 65 KB · 0 KB savings available

Within 1MB page-weight target

Got: 65 KB

30 third-party resources (100% of weight)

31 resources · 64.8 KiB · 30 third-party Within 1MB page-weight target

JavaScript 56% · 36.4 KiB

CSS 26% · 17.0 KiB

Document 15% · 9.8 KiB

Image 2% · 1.0 KiB

Other 1% · 568 B

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

31 resources			64.8 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

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

31 requests over 268ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

100% of JavaScript execution is third-party

First-party Third-party 757ms · 34KB · €8/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
www.addtoany.com www.addtoany.com	Other	421ms	8 KB	—	€5/mo	Costly
Unattributable Unattributable	Other	255ms	0 KB	—	€3/mo	Costly
static.addtoany.com static.addtoany.com	Other	81ms	26 KB	—	€1/mo	Optional

www.addtoany.com

Other

Costly

Execution 421ms

Transfer 8 KB

Monthly Cost €5/mo

Unattributable

Other

Costly

Execution 255ms

Transfer 0 KB

Monthly Cost €3/mo

static.addtoany.com

Other

Optional

Execution 81ms

Transfer 26 KB

Monthly Cost €1/mo

These scripts may cost more than they're worth

www.addtoany.com adds 421ms and costs ~€5/month
Unattributable adds 255ms and costs ~€3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

www.addtoany.com takes 421ms 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

Unattributable takes 255ms 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.