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https://haproxy.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
2
PASS
11
INFO
2

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
52
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
88
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
77
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

1.82 s

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

2.03 s

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

0 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.

1.82 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.

2.03 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
17
11 PASS 2 REVIEW 2 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (77.9 KiB of 78.0 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
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.

B
Image Optimization
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Info::
All images are well-optimized
7 images 52 KB
0 oversized -0 KB
7 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
78 KB transferred, 11 requests
PASS
78 KB transferred, 11 requests
Info::
Page weighs 130 KB (78 KB transferred)
Info::
11 HTTP requests
Info::
Estimated 0.02 g CO2 per page load
78 KB / 2.4 MB budget
78 KB transferred
11 requests
0.02 g CO2 per page load
Images 51.8 KiB 66%
HTML 25.5 KiB 33%
Other 382 B 0%
CSS 255 B 0%
0 2.4 MB 4.9 MB
Under budget
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
JS Execution Cost
358ms total JS execution
PASS
358ms total JS execution
Warning::
https://www.haproxy.org/: 250ms CPU time
Info::
Unattributable: 108ms CPU time
Warning::
Third-party scripts: 358ms (100% of total)

Main Thread Breakdown

Other 37% Style & Layout 35% Rendering 16% Parse HTML & CSS 6% Script Evaluation 6%
ScriptTotalScriptingParse/CompileParty
https://www.haproxy.org/250ms13ms3ms3rd
Unattributable108ms5ms0ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
No JavaScript
PASS
No JavaScript
Info::
No JavaScript bundles
No JavaScript files loaded.
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
11 resources · 78 KB · 0 KB savings available
PASS
11 resources · 78 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 78 KB
Warning::
10 third-party resources (100% of weight)
11 resources · 78.0 KiB · 10 third-party Within 1MB page-weight target
Image 66% · 51.8 KiB
Document 33% · 25.8 KiB
CSS 0% · 255 B
Other 0% · 99 B
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
11 requests over 360ms
INFO
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.8 s LCP 2.0 shttps://haproxy.org// https://haproxy.org/ — 301 — 99 B — 91 ms — h2https://www.haproxy.org/www.haproxy.org/ https://www.haproxy.org/ — 200 — 25.5 KiB — 46 ms — h2https://www.haproxy.org/img/HAProxyCommunityEdition_60px.pngwww.haproxy.org/img/HAProxyCommunit... https://www.haproxy.org/img/HAProxyCommunityEdition_60px.png — 200 — 14.9 KiB — 24 ms — h2https://whos.amung.us/cwidget/62nl1k3va5id/069ed8fff200.pngwhos.amung.us/cwidget/62nl1k3va5id/... https://whos.amung.us/cwidget/62nl1k3va5id/069ed8fff200.png — 307 — 283 B — 166 ms — h3https://www.haproxy.org/img/Ad_1.pngwww.haproxy.org/img/Ad_1.png https://www.haproxy.org/img/Ad_1.png — 200 — 10.2 KiB — 24 ms — h2https://www.haproxy.org/img/Ad_2.pngwww.haproxy.org/img/Ad_2.png https://www.haproxy.org/img/Ad_2.png — 200 — 8.2 KiB — 27 ms — h2https://www.haproxy.org/img/Ad_4.pngwww.haproxy.org/img/Ad_4.png https://www.haproxy.org/img/Ad_4.png — 200 — 13.6 KiB — 40 ms — h2https://www.haproxy.org/img/btn_donate_SM_usd.gifwww.haproxy.org/img/btn_donate_SM_u... https://www.haproxy.org/img/btn_donate_SM_usd.gif — 200 — 1.7 KiB — 41 ms — h2https://www.haproxy.org/img/btn_donate_SM_eur.gifwww.haproxy.org/img/btn_donate_SM_e... https://www.haproxy.org/img/btn_donate_SM_eur.gif — 200 — 1.7 KiB — 41 ms — h2https://www.haproxy.org/size.css?412x823www.haproxy.org/size.css?412x823 https://www.haproxy.org/size.css?412x823 — 200 — 255 B — 24 ms — h3https://widgets.amung.us/draw/?w=colored&n=4&c=069ed8fff200&p=leftwidgets.amung.us/draw/?w=colored&n=... https://widgets.amung.us/draw/?w=colored&n=4&c=069ed8fff200&p=left — 200 — 1.5 KiB — 59 ms — h3
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 358ms · 26KB · €4/mo
www.haproxy.org
Other
Costly
Execution 250ms
Transfer 26 KB
Monthly Cost €3/mo
Unattributable
Other
Optional
Execution 108ms
Transfer 0 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • www.haproxy.org adds 250ms 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.haproxy.org takes 250ms 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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