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

SEO

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

2.91 s

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

5.83 s

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

114 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.012

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

4.41 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.

6.64 s

Page Load Progression

560 ms

1.1 s

1.7 s

2.2 s

2.8 s

3.4 s

3.9 s

4.5 s

Checks

7 PASS 4 REVIEW 4 FIX

Page Weight Budget

Action

4.0 MB transferred, 26 requests

FIX

4.0 MB transferred, 26 requests

Page weighs 4.6 MB (4.0 MB transferred)

26 HTTP requests

Estimated 0.84 g CO2 per page load

4.0 MB transferred

26 requests

0.84 g CO2 per page load

Other 3.3 MiB 82%

JavaScript 402.2 KiB 10%

Images 210.6 KiB 5%

Fonts 116.2 KiB 3%

CSS 7.3 KiB 0%

HTML 4.1 KiB 0%

Other 1.8 KiB 0%

0 2.4 MB 4.9 MB

Over budget

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 (4.0 MiB of 4.0 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

Page Weight Inventory

Action

26 resources · 4.0 MB · 242 KB savings available

FIX

26 resources · 4.0 MB · 242 KB savings available

Page weight 3.0 MB over 1MB target

Got: 4.0 MB Expected: ≤ 1 MB

~242 KB of savings available

25 third-party resources (100% of weight)

2 resources over 200KB

26 resources · 4.0 MiB · 25 third-party 3.0 MiB over 1MB target

Media 82% · 3.3 MiB

JavaScript 10% · 402.2 KiB

Image 5% · 211.9 KiB

Font 3% · 116.2 KiB

CSS 0% · 7.3 KiB

Document 0% · 4.5 KiB

~242.2 KiB of savings available

Remove unused JavaScript: 242.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

26 resources			4.0 MiB

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

Action

6 images, 0 KB saveable

REVIEW

6 images, 0 KB saveable

https://cdn.akamai.steamstatic.com/valvesoftware/i... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://cdn.akamai.steamstatic.com/valvesoftware/i... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

6 images 211 KB

0 oversized -0 KB

6 legacy format

2 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

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

Action

1419ms total JS execution

REVIEW

1419ms total JS execution

Unattributable: 564ms CPU time

https://www.valvesoftware.com/en/: 466ms CPU time

https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 267ms CPU time

https://www.valvesoftware.com/en/public/shared/jav...: 122ms CPU time

Third-party scripts: 1419ms (100% of total)

Main Thread Breakdown

Other 43% Style & Layout 23% Script Evaluation 17% Script Parsing & Compilation 10% Rendering 4%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	564ms	18ms	0ms	3rd
https://www.valvesoftware.com/en/	466ms	5ms	1ms	3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	267ms	138ms	129ms	3rd
https://www.valvesoftware.com/en/public/shared/javascript/jquery-1.8.3.min.js?v=NXam5zydzNu8&_cdn=akamai	122ms	83ms	13ms	3rd

JS Bundles

Action

5 scripts, 242 KB unused

REVIEW

5 scripts, 242 KB unused

https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 242 KB unused (67%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 242 KB

242 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js	362 KB	242 KB (67%)	✓	3rd
https://www.valvesoftware.com/en/public/shared/javascript/jquery-1.8.3.min.js?v=NXam5zydzNu8&_cdn=akamai	33 KB	—	✓	3rd
https://www.valvesoftware.com/en/public/javascript/valvesoftware.js?v=Yw_MCZWiaUD0&_cdn=akamai	3 KB	—	✓	3rd
https://www.valvesoftware.com/en/public/javascript/jobs.js?v=KKAPM5KmPVH7&_cdn=akamai	3 KB	—	✓	3rd
https://www.google.com/recaptcha/api.js	1 KB	—	✓	3rd

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

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

4 fonts (116 KB)

PASS

4 fonts (116 KB)

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

Web fonts

116 KB total

Render-blocking

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

apercu-medium.WOFF woff swap

Size 29 KB

Load time 205 ms

Start 708 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

apercu-black.WOFF woff swap

Size 29 KB

Load time 364 ms

Start 708 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

apercu-regular.WOFF woff swap

Size 29 KB

Load time 353 ms

Start 710 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

apercu-bold.WOFF woff swap

Size 29 KB

Load time 197 ms

Start 711 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

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)

Fixing the unchecked items could save ~35 KB and ~70 ms

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

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

Network Waterfall

26 requests over 2649ms

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 1419ms · 399KB · €15/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	564ms	0 KB	—	€6/mo	Costly
www.valvesoftware.com www.valvesoftware.com	Other	466ms	4 KB	—	€5/mo	Costly
www.gstatic.com www.gstatic.com	Other	267ms	362 KB	67%	€3/mo	Costly
www.valvesoftware.com www.valvesoftware.com	Other	122ms	33 KB	—	€1/mo	Optional

Unattributable

Other

Costly

Execution 564ms

Transfer 0 KB

Monthly Cost €6/mo

www.valvesoftware.com

Other

Costly

Execution 466ms

Transfer 4 KB

Monthly Cost €5/mo

www.gstatic.com

Other

Costly

Execution 267ms

Transfer 362 KB

Unused 67%

Monthly Cost €3/mo

www.valvesoftware.com

Other

Optional

Execution 122ms

Transfer 33 KB

Monthly Cost €1/mo

These scripts may cost more than they're worth

Unattributable adds 564ms and costs ~€6/month
www.valvesoftware.com adds 466ms and costs ~€5/month
www.gstatic.com adds 267ms 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

Unattributable takes 564ms 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

www.valvesoftware.com takes 466ms 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

www.gstatic.com takes 267ms 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

67% of www.gstatic.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

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.