Skip to content
https://raspberrypi.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
1
REVIEW
6
PASS
6
INFO
2

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

Mobile Desktop
59
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

1.86 s

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

2.72 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.

0.265

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

2.70 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.

2.75 s

Page Load Progression

511 ms
1.0 s
1.5 s
2.0 s
2.6 s
3.1 s
3.6 s
4.1 s
Checks
15
6 PASS 6 REVIEW 1 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 (1.4 MiB of 1.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
B
Page Weight Budget
1.4 MB transferred, 51 requests
REVIEW
1.4 MB transferred, 51 requests
Info::
Page weighs 2.5 MB (1.4 MB transferred)
Info::
51 HTTP requests
Info::
Estimated 0.29 g CO2 per page load
1.4 MB / 2.4 MB budget
1.4 MB transferred
51 requests
0.29 g CO2 per page load
Images 903.5 KiB 64%
JavaScript 350.0 KiB 25%
Fonts 88.5 KiB 6%
HTML 64.7 KiB 5%
CSS 4.5 KiB 0%
Other 4.0 KiB 0%
Other 2.8 KiB 0%
Other 1.1 KiB 0%
0 2.4 MB 4.9 MB
Under budget
B
Image Optimization
23 images, 0 KB saveable
REVIEW
23 images, 0 KB saveable
Info::
All images are well-optimized
23 images 904 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
665ms total JS execution
REVIEW
665ms total JS execution
Warning::
https://www.raspberrypi.com/: 344ms CPU time
Info::
Unattributable: 107ms CPU time
Info::
https://www.raspberrypi.com/cdn-cgi/challenge-plat...: 83ms CPU time
Info::
https://assets.raspberrypi.com/framework-d6a067728...: 73ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-V8TF...: 57ms CPU time
Warning::
Third-party scripts: 665ms (100% of total)

Main Thread Breakdown

Script Evaluation 39% Other 27% Style & Layout 19% Script Parsing & Compilation 6% Rendering 4% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.raspberrypi.com/344ms71ms3ms3rd
Unattributable107ms5ms0ms3rd
https://www.raspberrypi.com/cdn-cgi/challenge-platform/scripts/jsd/main.js83ms77ms1ms3rd
https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.js73ms60ms6ms3rd
https://www.googletagmanager.com/gtag/js?id=G-V8TFXM3BKJ57ms36ms19ms3rd
B
JS Bundles
12 scripts, 141 KB unused
REVIEW
12 scripts, 141 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-V8TF...: 69 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.raspberrypi.com/framework-d6a067728...: 26 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.raspberrypi.com/df02945b-80e3b072aa...: 24 KB unused (84%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.raspberrypi.com/8ac05776-8a121de94b...: 23 KB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 141 KB
141 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-V8TFXM3BKJ176 KB69 KB (39%)✓3rd
https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.js56 KB26 KB (46%)✓3rd
https://assets.raspberrypi.com/df02945b-80e3b072aad3e5e93993.js28 KB24 KB (84%)✓3rd
https://assets.raspberrypi.com/8ac05776-8a121de94bddf46194d4.js26 KB23 KB (92%)✓3rd
https://assets.raspberrypi.com/webpack-runtime-351ea74933173f48c7fe.js4 KB—✓3rd
https://assets.raspberrypi.com/app-659dd363c58642d7402f.js25 KB—✓3rd
https://www.raspberrypi.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?13 KB—✓3rd
https://assets.raspberrypi.com/slice---src-components-application-footer-index-js-efcf20ee4de42c917899.js4 KB—✓3rd
https://assets.raspberrypi.com/slice---src-components-application-header-index-js-53b406cfbfb6ef69ea31.js5 KB—✓3rd
https://assets.raspberrypi.com/8493f732395d3c5feb7c8d93f4797e0abff9210b-aa7fa3f9a9902b8cab19.js6 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

C
Page Weight Inventory
Action
51 resources · 1.4 MB · 141 KB savings available
REVIEW
51 resources · 1.4 MB · 141 KB savings available
Warning::
Page weight 395 KB over 1MB target
Got: 1.4 MB Expected: ≤ 1 MB
Info::
~141 KB of savings available
Warning::
50 third-party resources (100% of weight)
Info::
1 resources over 200KB
51 resources · 1.4 MiB · 50 third-party 395.1 KiB over 1MB target
Image 64% · 905.9 KiB
JavaScript 25% · 350.0 KiB
Font 6% · 88.5 KiB
Document 5% · 64.7 KiB
Other 0% · 5.5 KiB
CSS 0% · 4.5 KiB

~141.3 KiB of savings available

Remove unused JavaScript: 141.3 KiB
B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
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
3 fonts (88 KB)
PASS
3 fonts (88 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

88 KB total

Render-blocking

0

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s 2.5 s FCP 1.9 s LCP 2.7 shttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 9 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2 — 16.3 KiB — 9 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2 — 35.5 KiB — 35 ms — font-display: swap
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 9 ms
Start 2.5 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 16 KB
Load time 9 ms
Start 2.5 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 35 KB
Load time 35 ms
Start 2.6 s
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
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
51 requests over 4557ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.9 s LCP 2.7 shttps://raspberrypi.com// https://raspberrypi.com/ — 302 — 149 B — 968 ms — h2https://www.raspberrypi.com/www.raspberrypi.com/ https://www.raspberrypi.com/ — 200 — 64.7 KiB — 1.4 s — h3https://www.googletagmanager.com/gtag/js?id=G-V8TFXM3BKJwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-V8TFXM3BKJ — 200 — 176.3 KiB — 284 ms — h2https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap — 200 — 2.0 KiB — 122 ms — h2https://fonts.googleapis.com/css2?family=Rubik:wght@300;400;500;700&family=Roboto:wght@300;400;500;700&family=Roboto+Serif:wght@300&display=swapfonts.googleapis.com/css2?family=Ru... https://fonts.googleapis.com/css2?family=Rubik:wght@300;400;500;700&family=Roboto:wght@300;400;500;700&family=Roboto+Serif:wght@300&display=swap — 200 — 2.5 KiB — 71 ms — h2https://assets.raspberrypi.com/static/wordmark-7d1122c404e4a306da30135e1429547f.svgassets.raspberrypi.com/static/wordm... https://assets.raspberrypi.com/static/wordmark-7d1122c404e4a306da30135e1429547f.svg — 200 — 5.6 KiB — 261 ms — h3https://assets.raspberrypi.com/static/stacked-wordmark-3ec04eddee02d83cfb05ebdbbb3dc151.svgassets.raspberrypi.com/static/stack... https://assets.raspberrypi.com/static/stacked-wordmark-3ec04eddee02d83cfb05ebdbbb3dc151.svg — 200 — 5.6 KiB — 262 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='1261'%20width='1800'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1261'%20width='1800'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/d8c8df845f270ad324962846437aa55c/69a47/hero.webpassets.raspberrypi.com/static/d8c8d... https://assets.raspberrypi.com/static/d8c8df845f270ad324962846437aa55c/69a47/hero.webp — 200 — 210.3 KiB — 278 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='770'%20width='1051'%20xmlns='http://www.w3.org/20…www.w3.org/20… data:image/svg+xml;charset=utf-8,%3Csvg%20height='770'%20width='1051'%20xmlns='http://www.w3.org/20… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/3183a53e3f81fb7005c3a68458737660/dbfb6/cm5-banner.webpassets.raspberrypi.com/static/3183a... https://assets.raspberrypi.com/static/3183a53e3f81fb7005c3a68458737660/dbfb6/cm5-banner.webp — 200 — 69.6 KiB — 268 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='1035'%20width='1890'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1035'%20width='1890'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/a7a0847d71311864ef416b23599d6c0c/21cb4/cm5-mobile-banner.webpassets.raspberrypi.com/static/a7a08... https://assets.raspberrypi.com/static/a7a0847d71311864ef416b23599d6c0c/21cb4/cm5-mobile-banner.webp — 200 — 119.6 KiB — 269 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='1688'%20width='3000'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1688'%20width='3000'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='333'%20width='500'%20xmlns='http://www.w3.org/200…www.w3.org/200… data:image/svg+xml;charset=utf-8,%3Csvg%20height='333'%20width='500'%20xmlns='http://www.w3.org/200… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/9939cb46c00acdf882e22711de825d22/921bf/rp2350.webpassets.raspberrypi.com/static/9939c... https://assets.raspberrypi.com/static/9939cb46c00acdf882e22711de825d22/921bf/rp2350.webp — 200 — 8.8 KiB — 254 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='720'%20width='1280'%20xmlns='http://www.w3.org/20…www.w3.org/20… data:image/svg+xml;charset=utf-8,%3Csvg%20height='720'%20width='1280'%20xmlns='http://www.w3.org/20… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='1274'%20width='1274'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1274'%20width='1274'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='1920'%20width='1920'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1920'%20width='1920'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='1500'%20width='1500'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1500'%20width='1500'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/background-8665430ff5768dfd62599da79ebd6b29.pngassets.raspberrypi.com/static/backg... https://assets.raspberrypi.com/static/background-8665430ff5768dfd62599da79ebd6b29.png — 200 — 66.2 KiB — 103 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 36.7 KiB — 9 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2 — 200 — 16.3 KiB — 9 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2 — 200 — 35.5 KiB — 35 ms — h3https://www.raspberrypi.com/cdn-cgi/challenge-platform/scripts/jsd/main.jswww.raspberrypi.com/cdn-cgi/challen... https://www.raspberrypi.com/cdn-cgi/challenge-platform/scripts/jsd/main.js — 302 — 223 B — 68 ms — h3https://assets.raspberrypi.com/static/11949eeb7d46dad5b591cb995dfdb95a/64737/rp2350-background.pngassets.raspberrypi.com/static/11949... https://assets.raspberrypi.com/static/11949eeb7d46dad5b591cb995dfdb95a/64737/rp2350-background.png — 200 — 24.4 KiB — 47 ms — h3https://assets.raspberrypi.com/static/d4ad52bc315f6469c86fca1d28c516ae/0f82b/Screenshot-2026-04-17-at-12.19.44-Large.webpassets.raspberrypi.com/static/d4ad5... https://assets.raspberrypi.com/static/d4ad52bc315f6469c86fca1d28c516ae/0f82b/Screenshot-2026-04-17-at-12.19.44-Large.webp — 200 — 32.7 KiB — 54 ms — h3https://assets.raspberrypi.com/static/dd347a383a8ea43f0997aa304b7a2092/0b0b9/Screenshot-2021-07-14-at-10.38.39.webpassets.raspberrypi.com/static/dd347... https://assets.raspberrypi.com/static/dd347a383a8ea43f0997aa304b7a2092/0b0b9/Screenshot-2021-07-14-at-10.38.39.webp — 200 — 49.3 KiB — 67 ms — h3https://assets.raspberrypi.com/static/cc864717dd9d59e3f725f3347282ec1c/ece2e/cli.webpassets.raspberrypi.com/static/cc864... https://assets.raspberrypi.com/static/cc864717dd9d59e3f725f3347282ec1c/ece2e/cli.webp — 200 — 20.6 KiB — 58 ms — h3https://assets.raspberrypi.com/static/bf6d3dfd8aaabaa618d82ca7d8f55c98/26222/store.webpassets.raspberrypi.com/static/bf6d3... https://assets.raspberrypi.com/static/bf6d3dfd8aaabaa618d82ca7d8f55c98/26222/store.webp — 200 — 132.1 KiB — 79 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.9 s LCP 2.7 shttps://raspberrypi.com// https://raspberrypi.com/ — 302 — 149 B — 968 ms — h2https://www.raspberrypi.com/www.raspberrypi.com/ https://www.raspberrypi.com/ — 200 — 64.7 KiB — 1.4 s — h3https://www.googletagmanager.com/gtag/js?id=G-V8TFXM3BKJwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-V8TFXM3BKJ — 200 — 176.3 KiB — 284 ms — h2https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:wght@400;700&display=swap — 200 — 2.0 KiB — 122 ms — h2https://fonts.googleapis.com/css2?family=Rubik:wght@300;400;500;700&family=Roboto:wght@300;400;500;700&family=Roboto+Serif:wght@300&display=swapfonts.googleapis.com/css2?family=Ru... https://fonts.googleapis.com/css2?family=Rubik:wght@300;400;500;700&family=Roboto:wght@300;400;500;700&family=Roboto+Serif:wght@300&display=swap — 200 — 2.5 KiB — 71 ms — h2https://assets.raspberrypi.com/static/wordmark-7d1122c404e4a306da30135e1429547f.svgassets.raspberrypi.com/static/wordm... https://assets.raspberrypi.com/static/wordmark-7d1122c404e4a306da30135e1429547f.svg — 200 — 5.6 KiB — 261 ms — h3https://assets.raspberrypi.com/static/stacked-wordmark-3ec04eddee02d83cfb05ebdbbb3dc151.svgassets.raspberrypi.com/static/stack... https://assets.raspberrypi.com/static/stacked-wordmark-3ec04eddee02d83cfb05ebdbbb3dc151.svg — 200 — 5.6 KiB — 262 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='1261'%20width='1800'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1261'%20width='1800'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/d8c8df845f270ad324962846437aa55c/69a47/hero.webpassets.raspberrypi.com/static/d8c8d... https://assets.raspberrypi.com/static/d8c8df845f270ad324962846437aa55c/69a47/hero.webp — 200 — 210.3 KiB — 278 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='770'%20width='1051'%20xmlns='http://www.w3.org/20…www.w3.org/20… data:image/svg+xml;charset=utf-8,%3Csvg%20height='770'%20width='1051'%20xmlns='http://www.w3.org/20… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/3183a53e3f81fb7005c3a68458737660/dbfb6/cm5-banner.webpassets.raspberrypi.com/static/3183a... https://assets.raspberrypi.com/static/3183a53e3f81fb7005c3a68458737660/dbfb6/cm5-banner.webp — 200 — 69.6 KiB — 268 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='1035'%20width='1890'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1035'%20width='1890'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/a7a0847d71311864ef416b23599d6c0c/21cb4/cm5-mobile-banner.webpassets.raspberrypi.com/static/a7a08... https://assets.raspberrypi.com/static/a7a0847d71311864ef416b23599d6c0c/21cb4/cm5-mobile-banner.webp — 200 — 119.6 KiB — 269 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='1688'%20width='3000'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1688'%20width='3000'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='333'%20width='500'%20xmlns='http://www.w3.org/200…www.w3.org/200… data:image/svg+xml;charset=utf-8,%3Csvg%20height='333'%20width='500'%20xmlns='http://www.w3.org/200… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/9939cb46c00acdf882e22711de825d22/921bf/rp2350.webpassets.raspberrypi.com/static/9939c... https://assets.raspberrypi.com/static/9939cb46c00acdf882e22711de825d22/921bf/rp2350.webp — 200 — 8.8 KiB — 254 ms — h3data:image/svg+xml;charset=utf-8,%3Csvg%20height='720'%20width='1280'%20xmlns='http://www.w3.org/20…www.w3.org/20… data:image/svg+xml;charset=utf-8,%3Csvg%20height='720'%20width='1280'%20xmlns='http://www.w3.org/20… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='1274'%20width='1274'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1274'%20width='1274'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='1920'%20width='1920'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1920'%20width='1920'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg%20height='1500'%20width='1500'%20xmlns='http://www.w3.org/2…www.w3.org/2… data:image/svg+xml;charset=utf-8,%3Csvg%20height='1500'%20width='1500'%20xmlns='http://www.w3.org/2… — 200 — 0 B — 0 ms — datahttps://assets.raspberrypi.com/static/background-8665430ff5768dfd62599da79ebd6b29.pngassets.raspberrypi.com/static/backg... https://assets.raspberrypi.com/static/background-8665430ff5768dfd62599da79ebd6b29.png — 200 — 66.2 KiB — 103 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 36.7 KiB — 9 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2 — 200 — 16.3 KiB — 9 ms — h3https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2fonts.gstatic.com/s/roboto/v51/KFO7... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2 — 200 — 35.5 KiB — 35 ms — h3https://www.raspberrypi.com/cdn-cgi/challenge-platform/scripts/jsd/main.jswww.raspberrypi.com/cdn-cgi/challen... https://www.raspberrypi.com/cdn-cgi/challenge-platform/scripts/jsd/main.js — 302 — 223 B — 68 ms — h3https://assets.raspberrypi.com/static/11949eeb7d46dad5b591cb995dfdb95a/64737/rp2350-background.pngassets.raspberrypi.com/static/11949... https://assets.raspberrypi.com/static/11949eeb7d46dad5b591cb995dfdb95a/64737/rp2350-background.png — 200 — 24.4 KiB — 47 ms — h3https://assets.raspberrypi.com/static/d4ad52bc315f6469c86fca1d28c516ae/0f82b/Screenshot-2026-04-17-at-12.19.44-Large.webpassets.raspberrypi.com/static/d4ad5... https://assets.raspberrypi.com/static/d4ad52bc315f6469c86fca1d28c516ae/0f82b/Screenshot-2026-04-17-at-12.19.44-Large.webp — 200 — 32.7 KiB — 54 ms — h3https://assets.raspberrypi.com/static/dd347a383a8ea43f0997aa304b7a2092/0b0b9/Screenshot-2021-07-14-at-10.38.39.webpassets.raspberrypi.com/static/dd347... https://assets.raspberrypi.com/static/dd347a383a8ea43f0997aa304b7a2092/0b0b9/Screenshot-2021-07-14-at-10.38.39.webp — 200 — 49.3 KiB — 67 ms — h3https://assets.raspberrypi.com/static/cc864717dd9d59e3f725f3347282ec1c/ece2e/cli.webpassets.raspberrypi.com/static/cc864... https://assets.raspberrypi.com/static/cc864717dd9d59e3f725f3347282ec1c/ece2e/cli.webp — 200 — 20.6 KiB — 58 ms — h3https://assets.raspberrypi.com/static/bf6d3dfd8aaabaa618d82ca7d8f55c98/26222/store.webpassets.raspberrypi.com/static/bf6d3... https://assets.raspberrypi.com/static/bf6d3dfd8aaabaa618d82ca7d8f55c98/26222/store.webp — 200 — 132.1 KiB — 79 ms — h3https://assets.raspberrypi.com/static/607e198bdbfbd05833e79a54e3675897/07142/events.webpassets.raspberrypi.com/static/607e1... https://assets.raspberrypi.com/static/607e198bdbfbd05833e79a54e3675897/07142/events.webp — 200 — 45.4 KiB — 73 ms — h3https://assets.raspberrypi.com/static/8c35cb5d5ab33531733f58e4dbde6402/26222/foundation.webpassets.raspberrypi.com/static/8c35c... https://assets.raspberrypi.com/static/8c35cb5d5ab33531733f58e4dbde6402/26222/foundation.webp — 200 — 113.4 KiB — 81 ms — h3https://assets.raspberrypi.com/webpack-runtime-351ea74933173f48c7fe.jsassets.raspberrypi.com/webpack-runt... https://assets.raspberrypi.com/webpack-runtime-351ea74933173f48c7fe.js — 200 — 3.7 KiB — 32 ms — h3https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.jsassets.raspberrypi.com/framework-d6... https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.js — 200 — 55.8 KiB — 66 ms — h3https://assets.raspberrypi.com/app-659dd363c58642d7402f.jsassets.raspberrypi.com/app-659dd363... https://assets.raspberrypi.com/app-659dd363c58642d7402f.js — 200 — 25.5 KiB — 58 ms — h3https://www.raspberrypi.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?www.raspberrypi.com/cdn-cgi/challen... https://www.raspberrypi.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js? — 200 — 13.0 KiB — 30 ms — h3https://assets.raspberrypi.com/page-data/app-data.jsonassets.raspberrypi.com/page-data/ap... https://assets.raspberrypi.com/page-data/app-data.json — 200 — 537 B — 959 ms — h3https://assets.raspberrypi.com/page-data/index/page-data.jsonassets.raspberrypi.com/page-data/in... https://assets.raspberrypi.com/page-data/index/page-data.json — 200 — 1.6 KiB — 971 ms — h3https://www.raspberrypi.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.6688030970413026:1776809557:O7rLN3nqnRpqq1ETlvF4OHvbb1xtfdyTnSr74k0fOwE/9f0004d21cce9d59www.raspberrypi.com/cdn-cgi/challen... https://www.raspberrypi.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.6688030970413026:1776809557:O7rLN3nqnRpqq1ETlvF4OHvbb1xtfdyTnSr74k0fOwE/9f0004d21cce9d59 — 200 — 842 B — 22 ms — h3https://assets.raspberrypi.com/favicon.pngassets.raspberrypi.com/favicon.png https://assets.raspberrypi.com/favicon.png — 200 — 2.4 KiB — 13 ms — h3https://assets.raspberrypi.com/slice-data/footer.jsonassets.raspberrypi.com/slice-data/f... https://assets.raspberrypi.com/slice-data/footer.json — 200 — 549 B — 209 ms — h3https://assets.raspberrypi.com/slice-data/header.jsonassets.raspberrypi.com/slice-data/h... https://assets.raspberrypi.com/slice-data/header.json — 200 — 549 B — 211 ms — h3https://assets.raspberrypi.com/slice---src-components-application-footer-index-js-efcf20ee4de42c917899.jsassets.raspberrypi.com/slice---src-... https://assets.raspberrypi.com/slice---src-components-application-footer-index-js-efcf20ee4de42c917899.js — 200 — 4.0 KiB — 13 ms — h3https://assets.raspberrypi.com/slice---src-components-application-header-index-js-53b406cfbfb6ef69ea31.jsassets.raspberrypi.com/slice---src-... https://assets.raspberrypi.com/slice---src-components-application-header-index-js-53b406cfbfb6ef69ea31.js — 200 — 4.9 KiB — 14 ms — h3https://assets.raspberrypi.com/8493f732395d3c5feb7c8d93f4797e0abff9210b-aa7fa3f9a9902b8cab19.jsassets.raspberrypi.com/8493f732395d... https://assets.raspberrypi.com/8493f732395d3c5feb7c8d93f4797e0abff9210b-aa7fa3f9a9902b8cab19.js — 200 — 6.3 KiB — 17 ms — h3https://assets.raspberrypi.com/component---src-pages-index-js-6b9c56d3abf764d6fc71.jsassets.raspberrypi.com/component---... https://assets.raspberrypi.com/component---src-pages-index-js-6b9c56d3abf764d6fc71.js — 200 — 4.7 KiB — 17 ms — h3https://assets.raspberrypi.com/df02945b-80e3b072aad3e5e93993.jsassets.raspberrypi.com/df02945b-80e... https://assets.raspberrypi.com/df02945b-80e3b072aad3e5e93993.js — 200 — 28.4 KiB — 13 ms — h3https://assets.raspberrypi.com/8ac05776-8a121de94bddf46194d4.jsassets.raspberrypi.com/8ac05776-8a1... https://assets.raspberrypi.com/8ac05776-8a121de94bddf46194d4.js — 200 — 25.7 KiB — 18 ms — h3https://assets.raspberrypi.com/551-4d7e0ca4cc0d396d50ab.jsassets.raspberrypi.com/551-4d7e0ca4... https://assets.raspberrypi.com/551-4d7e0ca4cc0d396d50ab.js — 200 — 1.6 KiB — 13 ms — h3https://www.raspberrypi.com/wp-json/rptl/v1/comment-countswww.raspberrypi.com/wp-json/rptl/v1... https://www.raspberrypi.com/wp-json/rptl/v1/comment-counts — 200 — 585 B — 545 ms — h3https://www.google-analytics.com/g/collect?v=2&tid=G-V8TFXM3BKJ&gtm=45je64h1v9118757095za200zd9118757095&_p=1776812573795&gcs=G100&gcd=13p3p3p3p5l1&npa=1&dma_cps=-&dma=0&are=1&cid=168488346.1776812575&frm=0&pscdl=denied&rcb=11&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~118463801&dp=%2F&sid=1776812575&sct=1&seg=0&dl=https%3A%2F%2Fwww.raspberrypi.com%2F&dt=Raspberry%20Pi&_tu=gA&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.anonymize_ip=true&tfd=4031www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-V8TFXM3BKJ&gtm=45je64h1v9118757095za200zd9118757095&_p=1776812573795&gcs=G100&gcd=13p3p3p3p5l1&npa=1&dma_cps=-&dma=0&are=1&cid=168488346.1776812575&frm=0&pscdl=denied&rcb=11&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~118463801&dp=%2F&sid=1776812575&sct=1&seg=0&dl=https%3A%2F%2Fwww.raspberrypi.com%2F&dt=Raspberry%20Pi&_tu=gA&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.anonymize_ip=true&tfd=4031 — 204 — 552 B — 117 ms — h2
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 665ms · 297KB · $9/mo
www.raspberrypi.com
Other
Costly
Execution 344ms
Transfer 65 KB
Monthly Cost $5/mo
Unattributable
Other
Optional
Execution 107ms
Transfer 0 KB
Monthly Cost $1/mo
www.raspberrypi.com
Other
Optional
Execution 83ms
Transfer 0 KB
Monthly Cost $1/mo
assets.raspberrypi.com
Other
Optional
Execution 73ms
Transfer 56 KB
Unused 46%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 57ms
Transfer 176 KB
Unused 39%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.raspberrypi.com adds 344ms and costs ~$5/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.raspberrypi.com takes 344ms 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.

Send Feedback