Skip to content
https://raspberrypi.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
2
REVIEW
3
PASS
10
INFO
2

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

Mobile Desktop
47
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.

4.50 s

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

5.33 s

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

243 ms

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

0.304

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

5.55 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.

8.73 s

Page Load Progression

419 ms
837 ms
1.3 s
1.7 s
2.1 s
2.5 s
2.9 s
3.3 s
Checks
17
10 PASS 3 REVIEW 2 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 (940.2 KiB of 940.4 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2429ms total JS execution
FIX
2429ms total JS execution
Warning::
https://www.raspberrypi.com/: 1126ms CPU time
Warning::
https://www.raspberrypi.com/cdn-cgi/challenge-plat...: 382ms CPU time
Warning::
Unattributable: 326ms CPU time
Warning::
https://assets.raspberrypi.com/framework-d6a067728...: 285ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-V8TF...: 207ms CPU time
Warning::
Third-party scripts: 2429ms (100% of total)

Main Thread Breakdown

Script Evaluation 44% Other 20% Style & Layout 20% Script Parsing & Compilation 6% Parse HTML & CSS 5% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.raspberrypi.com/1126ms257ms12ms3rd
https://www.raspberrypi.com/cdn-cgi/challenge-platform/scripts/jsd/main.js382ms362ms4ms3rd
Unattributable326ms19ms0ms3rd
https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.js285ms230ms25ms3rd
https://www.googletagmanager.com/gtag/js?id=G-V8TFXM3BKJ207ms125ms75ms3rd
https://assets.raspberrypi.com/app-659dd363c58642d7402f.js102ms67ms11ms3rd
B
Image Optimization
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
Info::
All images are well-optimized
20 images 425 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
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://www.raspberrypi.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/0b8fb825cb67/main.js?13 KB—✓3rd
https://assets.raspberrypi.com/webpack-runtime-351ea74933173f48c7fe.js4 KB—✓3rd
https://assets.raspberrypi.com/app-659dd363c58642d7402f.js25 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

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
Page Weight Budget
940 KB transferred, 48 requests
PASS
940 KB transferred, 48 requests
Info::
Page weighs 2.0 MB (940 KB transferred)
Info::
48 HTTP requests
Info::
Estimated 0.19 g CO2 per page load
940 KB / 2.4 MB budget
940 KB transferred
48 requests
0.19 g CO2 per page load
Images 425.2 KiB 45%
JavaScript 349.8 KiB 37%
Fonts 88.5 KiB 9%
HTML 64.7 KiB 7%
CSS 4.5 KiB 0%
Other 3.8 KiB 0%
Other 2.8 KiB 0%
Other 1.1 KiB 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+
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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 4.5 s LCP 5.3 shttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 14 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2 — 16.3 KiB — 12 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2 — 35.5 KiB — 6 ms — font-display: swap
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 14 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 16 KB
Load time 12 ms
Start 2.0 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 35 KB
Load time 6 ms
Start 2.0 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
Page Weight Inventory
48 resources · 940 KB · 141 KB savings available
PASS
48 resources · 940 KB · 141 KB savings available
Info::
Within 1MB page-weight target
Got: 940 KB
Info::
~141 KB of savings available
Warning::
47 third-party resources (100% of weight)
48 resources · 940.4 KiB · 47 third-party Within 1MB page-weight target
Image 45% · 427.6 KiB
JavaScript 37% · 349.8 KiB
Font 9% · 88.5 KiB
Document 7% · 64.7 KiB
Other 1% · 5.2 KiB
CSS 0% · 4.5 KiB

~141.2 KiB of savings available

Remove unused JavaScript: 141.2 KiB
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
48 requests over 3674ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 4.5 s LCP 5.3 shttps://raspberrypi.com// https://raspberrypi.com/ — 302 — 149 B — 970 ms — h2https://www.raspberrypi.com/www.raspberrypi.com/ https://www.raspberrypi.com/ — 200 — 64.7 KiB — 805 ms — 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 — 263 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 — 120 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 — 84 ms — h2https://assets.raspberrypi.com/static/wordmark-7d1122c404e4a306da30135e1429547f.svgassets.raspberrypi.com/static/wordm... https://assets.raspberrypi.com/static/wordmark-7d1122c404e4a306da30135e1429547f.svg — 200 — 5.7 KiB — 251 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 — 263 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/20fba/hero.webpassets.raspberrypi.com/static/d8c8d... https://assets.raspberrypi.com/static/d8c8df845f270ad324962846437aa55c/20fba/hero.webp — 200 — 82.0 KiB — 274 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 — 303 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/53065/cm5-mobile-banner.webpassets.raspberrypi.com/static/a7a08... https://assets.raspberrypi.com/static/a7a0847d71311864ef416b23599d6c0c/53065/cm5-mobile-banner.webp — 200 — 47.5 KiB — 277 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/9939cb46c00acdf882e22711de825d22/323e8/rp2350.webpassets.raspberrypi.com/static/9939c... https://assets.raspberrypi.com/static/9939cb46c00acdf882e22711de825d22/323e8/rp2350.webp — 200 — 28.8 KiB — 287 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://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 — 14 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 — 12 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 — 6 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 — 20 ms — h3https://assets.raspberrypi.com/static/background-8665430ff5768dfd62599da79ebd6b29.pngassets.raspberrypi.com/static/backg... https://assets.raspberrypi.com/static/background-8665430ff5768dfd62599da79ebd6b29.png — 200 — 66.2 KiB — 70 ms — h3https://assets.raspberrypi.com/static/607e198bdbfbd05833e79a54e3675897/4f03f/events.webpassets.raspberrypi.com/static/607e1... https://assets.raspberrypi.com/static/607e198bdbfbd05833e79a54e3675897/4f03f/events.webp — 200 — 21.1 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 — 12.9 KiB — 16 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 — 40 ms — h3https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.jsassets.raspberrypi.com/framework-d6... https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.js — 200 — 55.8 KiB — 56 ms — h3https://assets.raspberrypi.com/app-659dd363c58642d7402f.jsassets.raspberrypi.com/app-659dd363... https://assets.raspberrypi.com/app-659dd363c58642d7402f.js — 200 — 25.5 KiB — 52 ms — h3
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 4.5 s LCP 5.3 shttps://raspberrypi.com// https://raspberrypi.com/ — 302 — 149 B — 970 ms — h2https://www.raspberrypi.com/www.raspberrypi.com/ https://www.raspberrypi.com/ — 200 — 64.7 KiB — 805 ms — 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 — 263 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 — 120 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 — 84 ms — h2https://assets.raspberrypi.com/static/wordmark-7d1122c404e4a306da30135e1429547f.svgassets.raspberrypi.com/static/wordm... https://assets.raspberrypi.com/static/wordmark-7d1122c404e4a306da30135e1429547f.svg — 200 — 5.7 KiB — 251 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 — 263 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/20fba/hero.webpassets.raspberrypi.com/static/d8c8d... https://assets.raspberrypi.com/static/d8c8df845f270ad324962846437aa55c/20fba/hero.webp — 200 — 82.0 KiB — 274 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 — 303 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/53065/cm5-mobile-banner.webpassets.raspberrypi.com/static/a7a08... https://assets.raspberrypi.com/static/a7a0847d71311864ef416b23599d6c0c/53065/cm5-mobile-banner.webp — 200 — 47.5 KiB — 277 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/9939cb46c00acdf882e22711de825d22/323e8/rp2350.webpassets.raspberrypi.com/static/9939c... https://assets.raspberrypi.com/static/9939cb46c00acdf882e22711de825d22/323e8/rp2350.webp — 200 — 28.8 KiB — 287 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://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 — 14 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 — 12 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 — 6 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 — 20 ms — h3https://assets.raspberrypi.com/static/background-8665430ff5768dfd62599da79ebd6b29.pngassets.raspberrypi.com/static/backg... https://assets.raspberrypi.com/static/background-8665430ff5768dfd62599da79ebd6b29.png — 200 — 66.2 KiB — 70 ms — h3https://assets.raspberrypi.com/static/607e198bdbfbd05833e79a54e3675897/4f03f/events.webpassets.raspberrypi.com/static/607e1... https://assets.raspberrypi.com/static/607e198bdbfbd05833e79a54e3675897/4f03f/events.webp — 200 — 21.1 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 — 12.9 KiB — 16 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 — 40 ms — h3https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.jsassets.raspberrypi.com/framework-d6... https://assets.raspberrypi.com/framework-d6a06772850a459b99d4.js — 200 — 55.8 KiB — 56 ms — h3https://assets.raspberrypi.com/app-659dd363c58642d7402f.jsassets.raspberrypi.com/app-659dd363... https://assets.raspberrypi.com/app-659dd363c58642d7402f.js — 200 — 25.5 KiB — 52 ms — h3https://assets.raspberrypi.com/static/11949eeb7d46dad5b591cb995dfdb95a/0dee1/rp2350-background.pngassets.raspberrypi.com/static/11949... https://assets.raspberrypi.com/static/11949eeb7d46dad5b591cb995dfdb95a/0dee1/rp2350-background.png — 200 — 7.8 KiB — 45 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 — 59 ms — h3https://assets.raspberrypi.com/static/bf6d3dfd8aaabaa618d82ca7d8f55c98/d6f60/store.webpassets.raspberrypi.com/static/bf6d3... https://assets.raspberrypi.com/static/bf6d3dfd8aaabaa618d82ca7d8f55c98/d6f60/store.webp — 200 — 58.3 KiB — 54 ms — h3https://www.raspberrypi.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.6688030970413026:1776809557:O7rLN3nqnRpqq1ETlvF4OHvbb1xtfdyTnSr74k0fOwE/9f00045d3cfb2912www.raspberrypi.com/cdn-cgi/challen... https://www.raspberrypi.com/cdn-cgi/challenge-platform/h/b/jsd/oneshot/0b8fb825cb67/0.6688030970413026:1776809557:O7rLN3nqnRpqq1ETlvF4OHvbb1xtfdyTnSr74k0fOwE/9f00045d3cfb2912 — 200 — 633 B — 13 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 — 817 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 — 816 ms — h3https://assets.raspberrypi.com/favicon.pngassets.raspberrypi.com/favicon.png https://assets.raspberrypi.com/favicon.png — 200 — 2.4 KiB — 19 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 — 213 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 — 213 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 — 15 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 — 19 ms — h3https://assets.raspberrypi.com/8493f732395d3c5feb7c8d93f4797e0abff9210b-aa7fa3f9a9902b8cab19.jsassets.raspberrypi.com/8493f732395d... https://assets.raspberrypi.com/8493f732395d3c5feb7c8d93f4797e0abff9210b-aa7fa3f9a9902b8cab19.js — 200 — 6.3 KiB — 15 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 — 18 ms — h3https://assets.raspberrypi.com/df02945b-80e3b072aad3e5e93993.jsassets.raspberrypi.com/df02945b-80e... https://assets.raspberrypi.com/df02945b-80e3b072aad3e5e93993.js — 200 — 28.4 KiB — 24 ms — h3https://assets.raspberrypi.com/8ac05776-8a121de94bddf46194d4.jsassets.raspberrypi.com/8ac05776-8a1... https://assets.raspberrypi.com/8ac05776-8a121de94bddf46194d4.js — 200 — 25.7 KiB — 20 ms — h3https://assets.raspberrypi.com/551-4d7e0ca4cc0d396d50ab.jsassets.raspberrypi.com/551-4d7e0ca4... https://assets.raspberrypi.com/551-4d7e0ca4cc0d396d50ab.js — 200 — 1.6 KiB — 14 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 — 357 ms — h3https://www.google-analytics.com/g/collect?v=2&tid=G-V8TFXM3BKJ&gtm=45je64h1v9118757095za200zd9118757095&_p=1776812554545&gcs=G100&gcd=13p3p3p3p5l1&npa=1&dma_cps=-&dma=0&are=1&cid=1182890693.1776812556&frm=0&pscdl=denied&rcb=1&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266400~117512543&dp=%2F&sid=1776812556&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=3348www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-V8TFXM3BKJ&gtm=45je64h1v9118757095za200zd9118757095&_p=1776812554545&gcs=G100&gcd=13p3p3p3p5l1&npa=1&dma_cps=-&dma=0&are=1&cid=1182890693.1776812556&frm=0&pscdl=denied&rcb=1&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266400~117512543&dp=%2F&sid=1776812556&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=3348 — 204 — 552 B — 135 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 2429ms · 322KB · $32/mo
www.raspberrypi.com
Other
Costly
Execution 1126ms
Transfer 65 KB
Monthly Cost $15/mo
www.raspberrypi.com
Other
Costly
Execution 382ms
Transfer 0 KB
Monthly Cost $5/mo
Unattributable
Other
Costly
Execution 326ms
Transfer 0 KB
Monthly Cost $4/mo
assets.raspberrypi.com
Other
Costly
Execution 285ms
Transfer 56 KB
Unused 46%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 207ms
Transfer 176 KB
Unused 39%
Monthly Cost $3/mo
assets.raspberrypi.com
Other
Optional
Execution 102ms
Transfer 25 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.raspberrypi.com adds 1126ms and costs ~$15/month
  • www.raspberrypi.com adds 382ms and costs ~$5/month
  • Unattributable adds 326ms and costs ~$4/month
  • assets.raspberrypi.com adds 285ms and costs ~$4/month
  • Google Tag Manager adds 207ms 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

www.raspberrypi.com takes 1126ms 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

www.raspberrypi.com takes 382ms 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

Unattributable takes 326ms 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

assets.raspberrypi.com takes 285ms 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 207ms 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