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https://raspberrypi.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
48
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
99
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.
92
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.

7.19 s

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

13.42 s

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

428 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.

7.25 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.

13.51 s

Page Load Progression

400 ms
800 ms
1.2 s
1.6 s
2.0 s
2.4 s
2.8 s
3.2 s
Checks
17
8 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
7.5 MB transferred, 79 requests
FIX
7.5 MB transferred, 79 requests
Critical::
Page weighs 9.0 MB (7.5 MB transferred)
Warning::
Images are 6.2 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 6.2 MB
Info::
Fonts are 727 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 727 KB
Warning::
JavaScript is 529 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 529 KB
Info::
79 HTTP requests
Info::
Estimated 1.6 g CO2 per page load
7.5 MB / 2.4 MB budget
7.5 MB transferred
79 requests
1.6 g CO2 per page load
Images 6.2 MiB 83%
Fonts 726.5 KiB 9%
JavaScript 529.3 KiB 7%
CSS 58.9 KiB 1%
HTML 12.6 KiB 0%
Other 5.2 KiB 0%
Other 1.2 KiB 0%
Other 1.0 KiB 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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
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 (7.5 MiB of 7.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2169ms total JS execution
FIX
2169ms total JS execution
Warning::
Unattributable: 639ms CPU time
Warning::
https://consent.cookiebot.com/uc.js?cbid=1e9a6bdd-...: 532ms CPU time
Warning::
https://www.raspberrypi.org/: 437ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MDT1...: 301ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-PRN...: 199ms CPU time
Warning::
Third-party scripts: 2169ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Other 30% Style & Layout 16% Parse HTML & CSS 10% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
Unattributable639ms29ms0ms3rd
https://consent.cookiebot.com/uc.js?cbid=1e9a6bdd-5870-4d54-8e5f-adcf6b5c5499&implementation=gtm&consentmode-dataredaction=dynamic532ms288ms11ms3rd
https://www.raspberrypi.org/437ms10ms2ms3rd
https://www.googletagmanager.com/gtag/js?id=G-MDT17TBCEB&cx=c&gtm=4e64h1301ms251ms48ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PRNJZ4J199ms156ms39ms3rd
chrome-error://chromewebdata/60ms17ms25ms3rd
D
Page Weight Inventory
Action
79 resources · 7.5 MB · 180 KB savings available
FIX
79 resources · 7.5 MB · 180 KB savings available
Warning::
Page weight 6.5 MB over 1MB target
Got: 7.5 MB Expected: ≤ 1 MB
Info::
~180 KB of savings available
Warning::
78 third-party resources (100% of weight)
Info::
6 resources over 200KB
79 resources · 7.5 MiB · 78 third-party 6.5 MiB over 1MB target
Image 83% · 6.2 MiB
Font 9% · 726.5 KiB
JavaScript 7% · 529.3 KiB
CSS 1% · 58.9 KiB
Document 0% · 12.8 KiB
Other 0% · 2.2 KiB

~179.5 KiB of savings available

Remove unused JavaScript: 179.5 KiB
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
26 images, 0 KB saveable
REVIEW
26 images, 0 KB saveable
Warning::
https://www.raspberrypi.org/assets/components/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.raspberrypi.org/assets/components/site... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
26 images 6.2 MB
0 oversized -0 KB
5 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
JS Bundles
Action
34 scripts, 180 KB unused
REVIEW
34 scripts, 180 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MDT1...: 69 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PRN...: 62 KB unused (48%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/1e9a6bdd-5870-4d54-8...: 26 KB unused (23%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://consent.cookiebot.com/uc.js?cbid=1e9a6bdd-...: 23 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 180 KB
180 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-MDT17TBCEB&cx=c&gtm=4e64h1176 KB69 KB (39%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PRNJZ4J130 KB62 KB (48%)✓3rd
https://consent.cookiebot.com/1e9a6bdd-5870-4d54-8e5f-adcf6b5c5499/cc.js?renew=false&referer=www.raspberrypi.org&dnt=false&init=false112 KB26 KB (23%)✓3rd
https://consent.cookiebot.com/uc.js?cbid=1e9a6bdd-5870-4d54-8e5f-adcf6b5c5499&implementation=gtm&consentmode-dataredaction=dynamic36 KB23 KB (66%)✓3rd
https://www.raspberrypi.org/assets/application/flavors/index-9c747488857e9c40b9d37c7b917e5b4e69c352fe32e8b8438836739e48ee4363.js1 KB—✓3rd
https://www.raspberrypi.org/assets/components/site/user_session-5841a6b53e06d15792356a105e9bed87a94613a5252892d54b1d01d540d9536c.js1 KB—✓3rd
https://www.raspberrypi.org/assets/turbo.min-8baa4be72b9b3b06080c07837434507cb5d575a03a8a24f0b57ca2291f835772.js28 KB—✓3rd
https://www.raspberrypi.org/assets/stimulus.min-db071f6abc13bd6dcc6bb5e9ef6cb5b8ac23c9428c059f7e8d602325937dde40.js11 KB—✓3rd
https://www.raspberrypi.org/assets/stimulus-loading-9baa52ea3b2eb0f7e14ff9ae46eab356ff4331366fa1dbfe77cc1993bffd48e6.js1 KB—✓3rd
https://www.raspberrypi.org/assets/controllers/application-32728f7b51246eb74f92f6592376d76400800637106c6cd6097277e862a75ad6.js0 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

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

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

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
2 fonts (727 KB)
PASS
2 fonts (727 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

727 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 7.2 s LCP 13.4 shttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 39 ms — font-display: swaphttps://fonts.gstatic.com/l/font?kit=gNMVW2J8Roq16WD5tFNRaeLQk6-SHQ_R00k4aWHSSmlN48ykJIXwhO2KrxPIdkxyeJE0F5o&skey=b2b11cf3b396438f&v=v325font https://fonts.gstatic.com/l/font?kit=gNMVW2J8Roq16WD5tFNRaeLQk6-SHQ_R00k4aWHSSmlN48ykJIXwhO2KrxPIdkxyeJE0F5o&skey=b2b11cf3b396438f&v=v325 — 689.8 KiB — 137 ms — font-display: swap
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 39 ms
Start 431 ms
Risk FOUT — text flashes from fallback to web font
font woff2 swap
Size 690 KB
Load time 137 ms
Start 433 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~345 KB and ~690 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
5 hints, 0 missing preconnects
PASS
5 hints, 0 missing preconnects
Info::
Page uses 5 resource hint(s)

Current Resource Hints

preconnect
2
preload
1
dns-prefetch
2
prefetch
—

5 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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
79 requests over 2722ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 7.2 s LCP 13.4 shttps://raspberrypi.org// https://raspberrypi.org/ — 301 — 146 B — 97 ms — h2https://www.raspberrypi.org/www.raspberrypi.org/ https://www.raspberrypi.org/ — 200 — 12.6 KiB — 44 ms — h2https://www.raspberrypi.org/assets/application-90f2f45b5c65e09f5d99e57e06b797b95a951376ede6886ed508b5588410896c.csswww.raspberrypi.org/assets/applicat... https://www.raspberrypi.org/assets/application-90f2f45b5c65e09f5d99e57e06b797b95a951376ede6886ed508b5588410896c.css — 200 — 55.3 KiB — 39 ms — h2https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,400;0,500;0,700;1,400;1,500&family=Roboto+Slab:wght@400;700&family=Rubik:wght@300;400;500;700&family=Space+Mono&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,400;0,500;0,700;1,400;1,500&family=Roboto+Slab:wght@400;700&family=Rubik:wght@300;400;500;700&family=Space+Mono&display=swap — 200 — 3.1 KiB — 125 ms — h2https://fonts.googleapis.com/css2?family=Material+Symbols+Sharp:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=block&text=open_iwarfdlutchvgfonts.googleapis.com/css2?family=Ma... https://fonts.googleapis.com/css2?family=Material+Symbols+Sharp:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200&display=block&text=open_iwarfdlutchvg — 200 — 486 B — 126 ms — h2https://ga.jspm.io/npm:es-module-shims@1.10.0/dist/es-module-shims.jsga.jspm.io/npm:es-module-shims@1.10... https://ga.jspm.io/npm:es-module-shims@1.10.0/dist/es-module-shims.js — 200 — 12.8 KiB — 185 ms — h2https://www.raspberrypi.org/assets/controllers/rpi_turnstile/turnstile_controller-46c7d30bcb2cab4ac816a5ae1223b7a0fe7a29b48734220dbc03364856d97721.jswww.raspberrypi.org/assets/controll... https://www.raspberrypi.org/assets/controllers/rpi_turnstile/turnstile_controller-46c7d30bcb2cab4ac816a5ae1223b7a0fe7a29b48734220dbc03364856d97721.js — 200 — 1.0 KiB — 47 ms — h2https://www.raspberrypi.org/assets/application-12a96d8179b877ef53042ffd027751cbcb335a39e270cc68150719267ced0a12.jswww.raspberrypi.org/assets/applicat... https://www.raspberrypi.org/assets/application-12a96d8179b877ef53042ffd027751cbcb335a39e270cc68150719267ced0a12.js — 200 — 691 B — 42 ms — h2https://www.raspberrypi.org/assets/entrypoints/application_critical-4750709a1085b15b56a34fe50599ff3824b1065768ccc8da5cf0a3561f35369e.jswww.raspberrypi.org/assets/entrypoi... https://www.raspberrypi.org/assets/entrypoints/application_critical-4750709a1085b15b56a34fe50599ff3824b1065768ccc8da5cf0a3561f35369e.js — 200 — 642 B — 50 ms — h2https://www.raspberrypi.org/assets/entrypoints/component_previews-7714202291b6f85e910533a5c021764053275a4f3bc678427e6abe459dfcb7ca.jswww.raspberrypi.org/assets/entrypoi... https://www.raspberrypi.org/assets/entrypoints/component_previews-7714202291b6f85e910533a5c021764053275a4f3bc678427e6abe459dfcb7ca.js — 200 — 480 B — 48 ms — h2https://www.raspberrypi.org/assets/entrypoints/home-d67f7b1fdc460970ac0281cac448926f1e13ebbd887d977b5b59bfe36d2fc5bc.jswww.raspberrypi.org/assets/entrypoi... https://www.raspberrypi.org/assets/entrypoints/home-d67f7b1fdc460970ac0281cac448926f1e13ebbd887d977b5b59bfe36d2fc5bc.js — 200 — 673 B — 54 ms — h2https://www.raspberrypi.org/assets/turbo.min-8baa4be72b9b3b06080c07837434507cb5d575a03a8a24f0b57ca2291f835772.jswww.raspberrypi.org/assets/turbo.mi... https://www.raspberrypi.org/assets/turbo.min-8baa4be72b9b3b06080c07837434507cb5d575a03a8a24f0b57ca2291f835772.js — 200 — 28.2 KiB — 56 ms — h2https://www.raspberrypi.org/assets/stimulus.min-db071f6abc13bd6dcc6bb5e9ef6cb5b8ac23c9428c059f7e8d602325937dde40.jswww.raspberrypi.org/assets/stimulus... https://www.raspberrypi.org/assets/stimulus.min-db071f6abc13bd6dcc6bb5e9ef6cb5b8ac23c9428c059f7e8d602325937dde40.js — 200 — 11.1 KiB — 61 ms — h2https://www.raspberrypi.org/assets/stimulus-loading-9baa52ea3b2eb0f7e14ff9ae46eab356ff4331366fa1dbfe77cc1993bffd48e6.jswww.raspberrypi.org/assets/stimulus... https://www.raspberrypi.org/assets/stimulus-loading-9baa52ea3b2eb0f7e14ff9ae46eab356ff4331366fa1dbfe77cc1993bffd48e6.js — 200 — 1.1 KiB — 63 ms — h2https://www.raspberrypi.org/assets/controllers/application-32728f7b51246eb74f92f6592376d76400800637106c6cd6097277e862a75ad6.jswww.raspberrypi.org/assets/controll... https://www.raspberrypi.org/assets/controllers/application-32728f7b51246eb74f92f6592376d76400800637106c6cd6097277e862a75ad6.js — 200 — 458 B — 45 ms — h2https://www.raspberrypi.org/assets/controllers/index-3ebb39a2432df08f6a61160ddfadec2416b98cffefc3ae2816264675a0b61a2d.jswww.raspberrypi.org/assets/controll... https://www.raspberrypi.org/assets/controllers/index-3ebb39a2432df08f6a61160ddfadec2416b98cffefc3ae2816264675a0b61a2d.js — 200 — 617 B — 40 ms — h2https://www.raspberrypi.org/assets/controllers/rating_controller-f4a956084bfc5339791208dfe0f62bc50c8a0f953aede70f9dd246d89db08843.jswww.raspberrypi.org/assets/controll... https://www.raspberrypi.org/assets/controllers/rating_controller-f4a956084bfc5339791208dfe0f62bc50c8a0f953aede70f9dd246d89db08843.js — 200 — 940 B — 63 ms — h2https://www.raspberrypi.org/assets/controllers/subscribe_controller-53f65e8207bd332d8c46eea96e86ff8f764701adf6fb6b4261951b9be5eb1b91.jswww.raspberrypi.org/assets/controll... https://www.raspberrypi.org/assets/controllers/subscribe_controller-53f65e8207bd332d8c46eea96e86ff8f764701adf6fb6b4261951b9be5eb1b91.js — 200 — 625 B — 48 ms — h2https://www.raspberrypi.org/assets/controllers/turnstile_controller-46f1cbbc705293fdca2db6dcb1798658930a4fdb2cdcad10c01c10d5f4e89a45.jswww.raspberrypi.org/assets/controll... https://www.raspberrypi.org/assets/controllers/turnstile_controller-46f1cbbc705293fdca2db6dcb1798658930a4fdb2cdcad10c01c10d5f4e89a45.js — 200 — 963 B — 49 ms — h2https://www.raspberrypi.org/assets/application/flavors/component-5fb5b8903d42418c4052571d7799c1f8deed14716131f07b6c11c04df82ccb25.jswww.raspberrypi.org/assets/applicat... https://www.raspberrypi.org/assets/application/flavors/component-5fb5b8903d42418c4052571d7799c1f8deed14716131f07b6c11c04df82ccb25.js — 200 — 591 B — 66 ms — h2https://www.raspberrypi.org/assets/application/flavors/controller-4c20f971a1732e2b4d3ba11cb7a9afdfc3216ce17b9f3694482f8cf584cbd4c2.jswww.raspberrypi.org/assets/applicat... https://www.raspberrypi.org/assets/application/flavors/controller-4c20f971a1732e2b4d3ba11cb7a9afdfc3216ce17b9f3694482f8cf584cbd4c2.js — 200 — 997 B — 69 ms — h2https://www.raspberrypi.org/assets/application/flavors/index-9c747488857e9c40b9d37c7b917e5b4e69c352fe32e8b8438836739e48ee4363.jswww.raspberrypi.org/assets/applicat... https://www.raspberrypi.org/assets/application/flavors/index-9c747488857e9c40b9d37c7b917e5b4e69c352fe32e8b8438836739e48ee4363.js — 200 — 535 B — 67 ms — h2https://www.raspberrypi.org/assets/application/flavors/state-1bfbdf6abb606ee1539b4b1cd5fd002a15aceb906260438eadf8ea5b720ca1ef.jswww.raspberrypi.org/assets/applicat... https://www.raspberrypi.org/assets/application/flavors/state-1bfbdf6abb606ee1539b4b1cd5fd002a15aceb906260438eadf8ea5b720ca1ef.js — 200 — 368 B — 70 ms — h2https://www.raspberrypi.org/assets/components/site/header-151d07ac258a55bf4c7ee6fa5e1d478e6babd33590d6523c655131f495a5c5f7.jswww.raspberrypi.org/assets/componen... https://www.raspberrypi.org/assets/components/site/header-151d07ac258a55bf4c7ee6fa5e1d478e6babd33590d6523c655131f495a5c5f7.js — 200 — 1.0 KiB — 79 ms — h2https://www.raspberrypi.org/assets/components/site/user_session-5841a6b53e06d15792356a105e9bed87a94613a5252892d54b1d01d540d9536c.jswww.raspberrypi.org/assets/componen... https://www.raspberrypi.org/assets/components/site/user_session-5841a6b53e06d15792356a105e9bed87a94613a5252892d54b1d01d540d9536c.js — 200 — 649 B — 72 ms — h2https://www.raspberrypi.org/assets/components/site/video-0a4aed001050e9851daaf428a73e77e67205bb4e27aa06bf7a3c098e12a003c5.jswww.raspberrypi.org/assets/componen... https://www.raspberrypi.org/assets/components/site/video-0a4aed001050e9851daaf428a73e77e67205bb4e27aa06bf7a3c098e12a003c5.js — 200 — 692 B — 74 ms — h2https://www.raspberrypi.org/assets/components/ui/blog_post-1cdc29c693a00afe5f8a6de98f45736380741b54504e0ed7b12a431037292bcf.jswww.raspberrypi.org/assets/componen... https://www.raspberrypi.org/assets/components/ui/blog_post-1cdc29c693a00afe5f8a6de98f45736380741b54504e0ed7b12a431037292bcf.js — 200 — 771 B — 76 ms — h2https://www.raspberrypi.org/assets/components/ui/image-1d9470485dd1c6907b0b689b0bb626e1446d526ffb9986bfa864ac3121b94737.jswww.raspberrypi.org/assets/componen... https://www.raspberrypi.org/assets/components/ui/image-1d9470485dd1c6907b0b689b0bb626e1446d526ffb9986bfa864ac3121b94737.js — 200 — 626 B — 81 ms — 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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
100% of JavaScript execution is third-party
First-party Third-party 2169ms · 354KB · €24/mo
Unattributable
Other
Costly
Execution 639ms
Transfer 0 KB
Monthly Cost €7/mo
consent.cookiebot.com
Other
Costly
Execution 532ms
Transfer 36 KB
Unused 66%
Monthly Cost €6/mo
www.raspberrypi.org
Other
Costly
Execution 437ms
Transfer 13 KB
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 301ms
Transfer 176 KB
Unused 39%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Optional
Execution 199ms
Transfer 130 KB
Unused 48%
Monthly Cost €2/mo
chromewebdata
Other
Optional
Execution 60ms
Transfer 0 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 639ms and costs ~€7/month
  • consent.cookiebot.com adds 532ms and costs ~€6/month
  • www.raspberrypi.org adds 437ms and costs ~€5/month
  • Google Tag Manager adds 301ms 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 639ms 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

consent.cookiebot.com takes 532ms 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

66% of consent.cookiebot.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

www.raspberrypi.org takes 437ms 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

Google Tag Manager takes 301ms 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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