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https://freesound.org

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
2
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
81
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
71
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
75
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.

463 ms

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

928 ms

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

27 ms

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

0.364

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

583 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.

931 ms

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
15
8 PASS 3 REVIEW 2 FIX
D
Third-Party Impact
Action
67% third-party, 0 ms blocking
FIX
67% third-party, 0 ms blocking
Warning::
Third-party code accounts for 67% of page weight (442.1 KiB of 657.3 KiB)
Info::
Third-party blocking time is low (0 ms)
33%
67%
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.

C
Image Optimization
Action
43 images, 0 KB saveable
REVIEW
43 images, 0 KB saveable
Warning::
https://cdn.freesound.org/displays/851/851457_7037... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851434_5674... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850694_1648... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851136_1842... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/769/769703_1572... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://freesound.org/static/bw-frontend/public/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/818/818086_1269... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851325_1132... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/404/404686_1944... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/842/842511_1825... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/847/847838_1852... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850502_1486... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851135_1842... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/818/818085_1269... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851433_5287... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851446_5287... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850754_1288... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851137_1842... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851431_5287... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/849/849524_1572... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851480_9034... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/827/827367_1269... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/740/740423_2675... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851532_3219... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850182_1059... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/849/849976_1868... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850138_1767... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850812_1241... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/188/188507_3506... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://freesound.org/static/bw-frontend/public/ph... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850410_1151... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850240_9034... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850770_5828... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851432_5287... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/614/614938_5828... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851529_1648... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/850/850824_5287... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/506/506054_1099... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.freesound.org/displays/851/851541_1288... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
43 images 269 KB
0 oversized -0 KB
41 legacy format
40 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

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

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

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

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

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

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

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

Performance issues directly impact user engagement and conversion rates.

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

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

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

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

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

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

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

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

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

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

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

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
JS Bundles
Action
5 scripts, 206 KB unused
REVIEW
5 scripts, 206 KB unused
Warning::
https://api.tiles.mapbox.com/mapbox-gl-js/v2.6.1/m...: 185 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://freesound.org/static/bw-frontend/dist/inde...: 21 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 206 KB
206 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://api.tiles.mapbox.com/mapbox-gl-js/v2.6.1/mapbox-gl.js234 KB185 KB (79%)✓3rd
https://freesound.org/static/bw-frontend/dist/index.2b66cae7a11f.js41 KB21 KB (52%)✓1st
https://analytics.freesound.org/js/plausible.manual.js3 KB—✓3rd
https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.7.2/mapbox-gl-geocoder.min.js18 KB—✓3rd
https://freesound.org/static/bw-frontend/dist/pages/front.b358425614dc.js9 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

B
Page Weight Inventory
55 resources · 657 KB · 206 KB savings available
REVIEW
55 resources · 657 KB · 206 KB savings available
Info::
Within 1MB page-weight target
Got: 657 KB
Info::
~206 KB of savings available
Warning::
44 third-party resources (67% of weight)
Info::
1 resources over 200KB
55 resources · 657.3 KiB · 44 third-party Within 1MB page-weight target
JavaScript 46% · 304.4 KiB
Image 41% · 270.9 KiB
Document 8% · 51.3 KiB
CSS 3% · 21.8 KiB
Font 1% · 7.9 KiB
Other 0% · 894 B

~205.9 KiB of savings available

Remove unused JavaScript: 205.9 KiB
A+
Page Weight Budget
657 KB transferred, 55 requests
PASS
657 KB transferred, 55 requests
Info::
Page weighs 1.9 MB (657 KB transferred)
Info::
55 HTTP requests
Info::
Estimated 0.13 g CO2 per page load
657 KB / 2.4 MB budget
657 KB transferred
55 requests
0.13 g CO2 per page load
JavaScript 304.4 KiB 46%
Images 269.4 KiB 41%
HTML 51.3 KiB 8%
CSS 21.8 KiB 3%
Fonts 7.9 KiB 1%
Other 1.5 KiB 0%
Other 702 B 0%
Other 192 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
400ms total JS execution
PASS
400ms total JS execution
Info::
https://freesound.org/: 172ms CPU time
Info::
https://freesound.org/static/bw-frontend/dist/inde...: 145ms CPU time
Info::
Unattributable: 83ms CPU time
Info::
Third-party scripts: 83ms (21% of total)

Main Thread Breakdown

Style & Layout 28% Other 28% Script Evaluation 21% Rendering 11% Parse HTML & CSS 6% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://freesound.org/172ms4ms1ms1st
https://freesound.org/static/bw-frontend/dist/index.2b66cae7a11f.js145ms66ms3ms1st
Unattributable83ms2ms0ms3rd
A+
Font Loading
1 fonts (8 KB)
PASS
1 fonts (8 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

8 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 463 ms LCP 928 mshttps://freesound.org/static/bw-frontend/dist/bw-icons.1fc88966.5e3225f9f93a.ttfbw-icons.1fc88966.5e322... https://freesound.org/static/bw-frontend/dist/bw-icons.1fc88966.5e3225f9f93a.ttf — 7.9 KiB — 48 ms — font-display: swap
bw-icons.1fc88966.5e322... ttf swap
Size 8 KB
Load time 48 ms
Start 316 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 ~2 KB and ~4 ms

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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

Network Waterfall
55 requests over 872ms
INFO
0 ms 200 ms 400 ms 600 ms 800 ms FCP 463 ms LCP 928 mshttps://freesound.org// https://freesound.org/ — 200 — 51.3 KiB — 225 ms — h2https://freesound.org/static/bw-frontend/dist/index.e9e6280b633e.css/static/bw-frontend/dist/index.e9e6... https://freesound.org/static/bw-frontend/dist/index.e9e6280b633e.css — 200 — 15.0 KiB — 71 ms — h2https://freesound.org/site.webmanifest/site.webmanifest https://freesound.org/site.webmanifest — 200 — 702 B — 140 ms — h2https://freesound.org/static/bw-frontend/public/upf_logo.06e9f326ce68.png/static/bw-frontend/public/upf_logo... https://freesound.org/static/bw-frontend/public/upf_logo.06e9f326ce68.png — 200 — 31.2 KiB — 51 ms — h2https://freesound.org/static/bw-frontend/public/phonos_logo.7c586cfd83d2.png/static/bw-frontend/public/phonos_l... https://freesound.org/static/bw-frontend/public/phonos_logo.7c586cfd83d2.png — 200 — 51.7 KiB — 94 ms — h2https://analytics.freesound.org/js/plausible.manual.jsanalytics.freesound.org/js/plausibl... https://analytics.freesound.org/js/plausible.manual.js — 200 — 2.6 KiB — 150 ms — h2https://api.tiles.mapbox.com/mapbox-gl-js/v2.6.1/mapbox-gl.jsapi.tiles.mapbox.com/mapbox-gl-js/v... https://api.tiles.mapbox.com/mapbox-gl-js/v2.6.1/mapbox-gl.js — 200 — 233.5 KiB — 86 ms — h3https://api.tiles.mapbox.com/mapbox-gl-js/v2.6.1/mapbox-gl.cssapi.tiles.mapbox.com/mapbox-gl-js/v... https://api.tiles.mapbox.com/mapbox-gl-js/v2.6.1/mapbox-gl.css — 200 — 5.1 KiB — 50 ms — h3https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.7.2/mapbox-gl-geocoder.min.jsapi.mapbox.com/mapbox-gl-js/plugins... https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.7.2/mapbox-gl-geocoder.min.js — 200 — 18.2 KiB — 59 ms — h2https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.7.2/mapbox-gl-geocoder.cssapi.mapbox.com/mapbox-gl-js/plugins... https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-geocoder/v4.7.2/mapbox-gl-geocoder.css — 200 — 1.7 KiB — 59 ms — h2https://freesound.org/static/bw-frontend/dist/index.2b66cae7a11f.js/static/bw-frontend/dist/index.2b66... https://freesound.org/static/bw-frontend/dist/index.2b66cae7a11f.js — 200 — 40.9 KiB — 98 ms — h2https://freesound.org/static/bw-frontend/dist/pages/front.b358425614dc.js/static/bw-frontend/dist/pages/fron... https://freesound.org/static/bw-frontend/dist/pages/front.b358425614dc.js — 200 — 9.2 KiB — 94 ms — h2https://freesound.org/static/bw-frontend/dist/logo-text.02c68389.40a23ae51c8b.svg/static/bw-frontend/dist/logo-text.... https://freesound.org/static/bw-frontend/dist/logo-text.02c68389.40a23ae51c8b.svg — 200 — 2.9 KiB — 71 ms — h2https://freesound.org/static/bw-frontend/dist/logo-labs-text.856959f1.7f5d264c4246.svg/static/bw-frontend/dist/logo-labs-... https://freesound.org/static/bw-frontend/dist/logo-labs-text.856959f1.7f5d264c4246.svg — 200 — 2.9 KiB — 67 ms — h2https://freesound.org/static/bw-frontend/dist/bw-icons.1fc88966.5e3225f9f93a.ttf/static/bw-frontend/dist/bw-icons.1... https://freesound.org/static/bw-frontend/dist/bw-icons.1fc88966.5e3225f9f93a.ttf — 200 — 7.9 KiB — 48 ms — h2data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAQAAAAfQ//73v/+BiOh/AAA=data:image/webp;base64,UklGRh4AAABX... data:image/webp;base64,UklGRh4AAABXRUJQVlA4TBEAAAAvAQAAAAfQ//73v/+BiOh/AAA= — 200 — 0 B — 0 ms — datahttps://cdn.freesound.org/displays/851/851541_12880153_wave_bw_M.pngcdn.freesound.org/displays/851/8515... https://cdn.freesound.org/displays/851/851541_12880153_wave_bw_M.png — 200 — 2.5 KiB — 187 ms — h2https://cdn.freesound.org/displays/851/851532_321967_wave_bw_M.pngcdn.freesound.org/displays/851/8515... https://cdn.freesound.org/displays/851/851532_321967_wave_bw_M.png — 200 — 3.4 KiB — 185 ms — h2https://cdn.freesound.org/displays/851/851529_1648170_wave_bw_M.pngcdn.freesound.org/displays/851/8515... 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
21% of JavaScript execution is third-party
First-party Third-party 83ms · 0KB · €1/mo
Unattributable
Other
Optional
Execution 83ms
Transfer 0 KB
Monthly Cost €1/mo

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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