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https://huggingface.co

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
3
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
97
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
77
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.

634 ms

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

905 ms

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

116 ms

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

0.018

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

777 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

2.11 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
14
6 PASS 3 REVIEW 3 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 901 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 901 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 901.0 KiB 28%
CSS 82.9 KiB 3%
Fonts 53.3 KiB 2%
Other 47.3 KiB 1%
HTML 20.3 KiB 1%
Other 4.5 KiB 0%
Other 580 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

D
JS Bundles
Action
53 scripts, 425 KB unused
FIX
53 scripts, 425 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/: 163 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 425 KB
425 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 KB163 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.

B
Image Optimization
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.
27 images 2.0 MB
0 oversized -0 KB
15 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

C
JS Execution Cost
Action
1541ms total JS execution
REVIEW
1541ms total JS execution
Warning::
https://huggingface.co/: 604ms CPU time
Warning::
Unattributable: 448ms CPU time
Warning::
https://de5282c3ca0c.edge.sdk.awswaf.com/de5282c3c...: 354ms CPU time
Info::
https://js.stripe.com/v3/: 80ms CPU time
Info::
https://huggingface.co/front/build/kube-83b7db8/in...: 55ms CPU time
Warning::
Third-party scripts: 882ms (57% of total)

Main Thread Breakdown

Other 33% Script Evaluation 26% Style & Layout 24% Rendering 7% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://huggingface.co/604ms5ms1ms1st
Unattributable448ms51ms0ms3rd
https://de5282c3ca0c.edge.sdk.awswaf.com/de5282c3ca0c/526cf06acb0d/challenge.js354ms265ms65ms3rd
https://js.stripe.com/v3/80ms53ms26ms3rd
https://huggingface.co/front/build/kube-83b7db8/index-client-Dv_OgQZo.js55ms41ms0ms1st
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 (835.6 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 500 ms 1.0 s FCP 634 ms LCP 905 mshttps://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/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/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
6xKydSBYKcSV-LCoeQqfX1R... woff2 swap
Size 14 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
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
-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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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
57% of JavaScript execution is third-party
First-party Third-party 882ms · 726KB · €10/mo
Unattributable
Other
Costly
Execution 448ms
Transfer 0 KB
Monthly Cost €5/mo
de5282c3ca0c.edge.sdk.awswaf.com
Other
Costly
Execution 354ms
Transfer 501 KB
Unused 52%
Monthly Cost €4/mo
Stripe
Payment
Essential
Execution 80ms
Transfer 225 KB
Unused 73%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 448ms and costs ~€5/month
  • de5282c3ca0c.edge.sdk.awswaf.com adds 354ms and costs ~€4/month

57% 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 448ms 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 354ms 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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