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https://huggingface.co

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
4
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
62
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
69
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

2.25 s

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

3.78 s

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

1.21 s

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.

2.33 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.

14.30 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
16
8 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
3.1 MB transferred, 98 requests
FIX
3.1 MB transferred, 98 requests
Warning::
Page weighs 8.4 MB (3.1 MB transferred)
Warning::
Images are 2.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.0 MB
Warning::
JavaScript is 902 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 902 KB
Info::
98 HTTP requests
Info::
Estimated 0.65 g CO2 per page load
3.1 MB / 2.4 MB budget
3.1 MB transferred
98 requests
0.65 g CO2 per page load
Images 2.0 MiB 65%
JavaScript 902.0 KiB 28%
CSS 82.9 KiB 3%
Fonts 53.3 KiB 2%
Other 47.3 KiB 1%
HTML 20.4 KiB 1%
Other 4.6 KiB 0%
Other 581 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

F
JS Execution Cost
Action
6390ms total JS execution
FIX
6390ms total JS execution
Warning::
https://huggingface.co/: 2295ms CPU time
Warning::
Unattributable: 1874ms CPU time
Warning::
https://de5282c3ca0c.edge.sdk.awswaf.com/de5282c3c...: 1485ms CPU time
Warning::
https://js.stripe.com/v3/: 412ms CPU time
Info::
https://huggingface.co/front/build/kube-83b7db8/in...: 208ms CPU time
Warning::
Third-party scripts: 3771ms (59% of total)

Main Thread Breakdown

Other 34% Script Evaluation 29% Style & Layout 23% Rendering 5% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://huggingface.co/2295ms23ms5ms1st
Unattributable1874ms228ms0ms3rd
https://de5282c3ca0c.edge.sdk.awswaf.com/de5282c3ca0c/526cf06acb0d/challenge.js1485ms1188ms173ms3rd
https://js.stripe.com/v3/412ms276ms134ms3rd
https://huggingface.co/front/build/kube-83b7db8/index-client-Dv_OgQZo.js208ms151ms1ms1st
https://huggingface.co/front/build/kube-83b7db8/style.css115ms0ms0ms1st
D
JS Bundles
Action
53 scripts, 402 KB unused
FIX
53 scripts, 402 KB unused
Warning::
https://de5282c3ca0c.edge.sdk.awswaf.com/de5282c3c...: 261 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.stripe.com/v3/: 141 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 402 KB
402 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://de5282c3ca0c.edge.sdk.awswaf.com/de5282c3ca0c/526cf06acb0d/challenge.js501 KB261 KB (52%)✓3rd
https://js.stripe.com/v3/225 KB141 KB (73%)✓3rd
https://huggingface.co/js/script.js3 KB—✓1st
https://huggingface.co/front/build/kube-83b7db8/index.js33 KB—✓1st
https://huggingface.co/front/build/kube-83b7db8/index-client-Dv_OgQZo.js28 KB—✓1st
https://huggingface.co/front/build/kube-83b7db8/disclose-version-CYLFKb47.js1 KB—✓1st
https://huggingface.co/front/build/kube-83b7db8/legacy-DcUPBsOj.js1 KB—✓1st
https://huggingface.co/front/build/kube-83b7db8/IconCaret-C7lMzAc9.js1 KB—✓1st
https://huggingface.co/front/build/kube-83b7db8/Dropdown-DRi4eFi8.js3 KB—✓1st
https://huggingface.co/front/build/kube-83b7db8/IconEnterprise-Bbh6wCMH.js1 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

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.
Info::
ETag present — enables conditional (304) responses

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Warning::
https://huggingface.co/front/assets/homepage/youne... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://huggingface.co/front/assets/homepage/model... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
27 images 2.0 MB
0 oversized -0 KB
15 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Third-Party Impact
26% third-party, 0 ms blocking
PASS
26% third-party, 0 ms blocking
Info::
Third-party code accounts for 26% of page weight (836.8 KiB of 3.1 MiB)
Info::
Third-party blocking time is low (0 ms)
74%
26%
First-party Third-party
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+
Font Loading
4 fonts (53 KB)
PASS
4 fonts (53 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

53 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s FCP 2.2 s LCP 3.8 shttps://fonts.gstatic.com/s/sourcesanspro/v23/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7lujVj9w.woff26xK3dSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7lujVj9w.woff2 — 14.5 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdu3cOWxw.woff26xKydSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdu3cOWxw.woff2 — 14.6 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdu3cOWxw.woff26xKydSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdu3cOWxw.woff2 — 14.4 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/ibmplexmono/v20/-F63fjptAgt5VM-kVkqdyU8n1i8q131nj-o.woff2-F63fjptAgt5VM-kVkqdyU8... https://fonts.gstatic.com/s/ibmplexmono/v20/-F63fjptAgt5VM-kVkqdyU8n1i8q131nj-o.woff2 — 9.8 KiB — 0 ms — font-display: swap
6xK3dSBYKcSV-LCoeQqfX1R... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R... woff2 swap
Size 14 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
-F63fjptAgt5VM-kVkqdyU8... woff2 swap
Size 10 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
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)
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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
—
prefetch
—

1 resource hints configured

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
98 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
59% of JavaScript execution is third-party
First-party Third-party 3771ms · 726KB · €41/mo
Unattributable
Other
Costly
Execution 1874ms
Transfer 0 KB
Monthly Cost €20/mo
de5282c3ca0c.edge.sdk.awswaf.com
Other
Costly
Execution 1485ms
Transfer 501 KB
Unused 52%
Monthly Cost €16/mo
Stripe
Payment
Essential
Execution 412ms
Transfer 225 KB
Unused 73%
Monthly Cost €4/mo

These scripts may cost more than they're worth

  • Unattributable adds 1874ms and costs ~€20/month
  • de5282c3ca0c.edge.sdk.awswaf.com adds 1485ms and costs ~€16/month

59% 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 1874ms 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

de5282c3ca0c.edge.sdk.awswaf.com takes 1485ms 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

52% of de5282c3ca0c.edge.sdk.awswaf.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

73% of Stripe'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.

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