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

100

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.

1.06 s

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

1.85 s

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

32 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.

1.06 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.

1.86 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 2 REVIEW 1 FIX

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.

Image Optimization

43 images, 0 KB saveable

REVIEW

43 images, 0 KB saveable

https://appsgolem.com/static/img/logo/appsgolem.19... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

43 images 113 KB

0 oversized -0 KB

43 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 Execution Cost

952ms total JS execution

REVIEW

952ms total JS execution

Unattributable: 576ms CPU time

https://appsgolem.com/en/: 325ms CPU time

https://appsgolem.com/static/js/htmx-2.0.3.min.930...: 50ms CPU time

Third-party scripts: 576ms (61% of total)

Main Thread Breakdown

Other 60% Style & Layout 26% Script Evaluation 6% Parse HTML & CSS 3%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	576ms	8ms	0ms	3rd
https://appsgolem.com/en/	325ms	5ms	2ms	1st
https://appsgolem.com/static/js/htmx-2.0.3.min.93063fe04ea3.js	50ms	38ms	4ms	1st

A+

Page Weight Budget

156 KB transferred, 50 requests

PASS

156 KB transferred, 50 requests

Page weighs 608 KB (156 KB transferred)

50 HTTP requests

Estimated 0.03 g CO2 per page load

156 KB transferred

50 requests

0.03 g CO2 per page load

Images 113.5 KiB 73%

JavaScript 15.7 KiB 10%

CSS 12.6 KiB 8%

HTML 11.6 KiB 7%

Other 2.3 KiB 2%

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.

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

2 scripts, 0 KB unused

PASS

2 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://appsgolem.com/static/js/htmx-2.0.3.min.93063fe04ea3.js	15 KB	—	✓	1st
https://appsgolem.com/static/js/menu-1.0.ea187f2bf712.js	1 KB	—	✓	1st

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

1 hints, 0 missing preconnects

PASS

1 hints, 0 missing preconnects

Page uses 1 resource hint(s)

Current Resource Hints

preconnect

—

preload

dns-prefetch

—

prefetch

—

1 resource hints configured

A+

Page Weight Inventory

50 resources · 156 KB · 0 KB savings available

PASS

50 resources · 156 KB · 0 KB savings available

Within 1MB page-weight target

Got: 156 KB

50 resources · 155.6 KiB · 0 third-party Within 1MB page-weight target

Image 74% · 115.3 KiB

JavaScript 10% · 15.7 KiB

CSS 8% · 12.6 KiB

Document 8% · 12.1 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

50 resources			155.6 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: OVHcloud

Network Waterfall

50 requests over 416ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

61% of JavaScript execution is third-party

First-party Third-party 576ms · 0KB · €7/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	576ms	0 KB	—	€7/mo	Costly

Unattributable

Other

Costly

Execution 576ms

Transfer 0 KB

Monthly Cost €7/mo

These scripts may cost more than they're worth

Unattributable adds 576ms and costs ~€7/month

61% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 576ms 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.