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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
81
GRADE
B
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
43
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
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.

6.91 s

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

9.52 s

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

588 ms

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

0.030

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

6.91 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.

9.54 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
8 PASS 3 REVIEW 4 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 (1.0 MiB of 1.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2316ms total JS execution
FIX
2316ms total JS execution
Warning::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 434ms CPU time
Warning::
https://fundingchoicesmessages.google.com/i/6978?e...: 320ms CPU time
Warning::
Unattributable: 301ms CPU time
Warning::
https://www.theregister.com/: 274ms CPU time
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 273ms CPU time
Warning::
Third-party scripts: 2316ms (100% of total)

Main Thread Breakdown

Script Evaluation 45% Style & Layout 24% Other 17% Script Parsing & Compilation 9% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://fundingchoicesmessages.google.com/f/AGSKWxVj29seL8AgpEyjIe5n4UDNR3GINSDvtqyX0Z3Pm-_8ShNrhMLneCSeJG7bTDcTBDq9yTWQLZ1rol1Ps8hYSh4tTzfkbLKFpiSRe5Hzh1Di1ntdAr9ql66vBqsCaex1ADnxWFwhDA==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODAwNjc3LDU4MTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cudGhlcmVnaXN0ZXIuY29tLyIsbnVsbCxbWzgsIkRzS0dOLXFxZnJRIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDQ1OV1dXSJdLFszNSwiMTc3NjgwMDY3NyJdLFsyNiwiMCJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjUsIltbOTUzODYxODhdXSJdLFsyOSwiZmFsc2UiXV1d434ms175ms41ms3rd
https://fundingchoicesmessages.google.com/i/6978?ers=3320ms296ms18ms3rd
Unattributable301ms10ms0ms3rd
https://www.theregister.com/274ms13ms3ms3rd
https://pagead2.googlesyndication.com/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31097964273ms182ms55ms3rd
https://www.googletagmanager.com/gtag/js?id=G-JXW44Y23NM&cx=c&gtm=4e64h1215ms163ms52ms3rd
https://cdn.theregister.com/chrome/masthead.iife.93eb6f47.js213ms8ms1ms3rd
https://assets.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js130ms85ms20ms3rd
https://pagead2.googlesyndication.com/tag/js/gpt.js94ms83ms11ms3rd
https://www.googletagmanager.com/gtag/js62ms42ms19ms3rd
D
JS Bundles
Action
10 scripts, 332 KB unused
FIX
10 scripts, 332 KB unused
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 130 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-JXW4...: 77 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js: 50 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.theregister.com/design_picker/31ed5...: 39 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fundingchoicesmessages.google.com/i/6978?e...: 36 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 332 KB
332 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pagead2.googlesyndication.com/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31097964188 KB130 KB (69%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-JXW44Y23NM&cx=c&gtm=4e64h1177 KB77 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js85 KB50 KB (60%)✓3rd
https://assets.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js63 KB39 KB (62%)✓3rd
https://fundingchoicesmessages.google.com/i/6978?ers=370 KB36 KB (52%)✓3rd
https://pagead2.googlesyndication.com/tag/js/gpt.js34 KB—✓3rd
https://www.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js62 KB—✓3rd
https://cdn.theregister.com/chrome/masthead.iife.93eb6f47.js2 KB—✓3rd
https://www.theregister.com/design_picker/c00f80f04b0eaf0123d821f6c9488fc1cb55fd0a/javascript/ads.js0 KB—✓3rd
https://fundingchoicesmessages.google.com/f/AGSKWxVj29seL8AgpEyjIe5n4UDNR3GINSDvtqyX0Z3Pm-_8ShNrhMLneCSeJG7bTDcTBDq9yTWQLZ1rol1Ps8hYSh4tTzfkbLKFpiSRe5Hzh1Di1ntdAr9ql66vBqsCaex1ADnxWFwhDA==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODAwNjc3LDU4MTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cudGhlcmVnaXN0ZXIuY29tLyIsbnVsbCxbWzgsIkRzS0dOLXFxZnJRIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDQ1OV1dXSJdLFszNSwiMTc3NjgwMDY3NyJdLFsyNiwiMCJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjUsIltbOTUzODYxODhdXSJdLFsyOSwiZmFsc2UiXV1d67 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

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Page Weight Budget
1.0 MB transferred, 49 requests
REVIEW
1.0 MB transferred, 49 requests
Info::
Page weighs 3.2 MB (1.0 MB transferred)
Warning::
JavaScript is 748 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 748 KB
Info::
49 HTTP requests
Info::
Estimated 0.22 g CO2 per page load
1.0 MB / 2.4 MB budget
1.0 MB transferred
49 requests
0.22 g CO2 per page load
JavaScript 747.6 KiB 70%
Images 145.5 KiB 14%
Fonts 73.6 KiB 7%
CSS 50.4 KiB 5%
Other 26.7 KiB 3%
HTML 17.7 KiB 2%
Other 964 B 0%
Other 647 B 0%
Other 20 B 0%
0 2.4 MB 4.9 MB
Under budget

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

C
Image Optimization
Action
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://cdn.theregister.com/assets/images/magnifyi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.theregister.com/assets/images/situatio... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.theregister.com/assets/images/burger_m... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.theregister.com/assets/images/the_regi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.theregister.com/assets/images/the_regi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.theregister.com/assets/images/magnifyi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 146 KB
0 oversized -0 KB
13 legacy format
6 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

B
Page Weight Inventory
49 resources · 1.0 MB · 332 KB savings available
REVIEW
49 resources · 1.0 MB · 332 KB savings available
Warning::
Page weight 39 KB over 1MB target
Got: 1.0 MB Expected: ≤ 1 MB
Info::
~332 KB of savings available
Warning::
48 third-party resources (100% of weight)
49 resources · 1.0 MiB · 48 third-party 39.3 KiB over 1MB target
JavaScript 70% · 748.1 KiB
Image 14% · 149.2 KiB
Font 7% · 73.6 KiB
CSS 5% · 50.4 KiB
Other 2% · 24.1 KiB
Document 2% · 17.9 KiB

~331.9 KiB of savings available

Remove unused JavaScript: 331.9 KiB
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
4 fonts (74 KB)
PASS
4 fonts (74 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

74 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 6.9 s LCP 9.5 shttps://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swapcss2 https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swap — 2.1 KiB — 97 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2KFOMCnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2 — 14.8 KiB — 28 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 47 ms — font-display: swaphttps://fonts.gstatic.com/s/arimo/v35/P5sMzZCDf9_T_10ZxCFuj5-v.woff2P5sMzZCDf9_T_10ZxCFuj5-... https://fonts.gstatic.com/s/arimo/v35/P5sMzZCDf9_T_10ZxCFuj5-v.woff2 — 20.1 KiB — 47 ms — font-display: swap
css2 unknown swap
Size 2 KB
Load time 97 ms
Start 130 ms
Risk FOUT — text flashes from fallback to web font
KFOMCnqEu92Fr1ME7kSn66a... woff2 swap
Size 15 KB
Load time 28 ms
Start 942 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 47 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
P5sMzZCDf9_T_10ZxCFuj5-... woff2 swap
Size 20 KB
Load time 47 ms
Start 1.0 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)

Fixing the unchecked items could save ~1 KB and ~2 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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
—

1 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
49 requests over 1724ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 6.9 s LCP 9.5 shttps://theregister.com// https://theregister.com/ — 301 — 121 B — 63 ms — h2https://www.theregister.com/www.theregister.com/ https://www.theregister.com/ — 200 — 17.7 KiB — 58 ms — h2https://pagead2.googlesyndication.com/tag/js/gpt.jspagead2.googlesyndication.com/tag/j... https://pagead2.googlesyndication.com/tag/js/gpt.js — 200 — 33.8 KiB — 122 ms — h3https://www.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.jswww.theregister.com/design_picker/3... https://www.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js — 200 — 62.4 KiB — 45 ms — h2https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/scaffolding.csswww.theregister.com/css/4edda76fcf5... https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/scaffolding.css — 200 — 3.1 KiB — 26 ms — h2https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/design.csswww.theregister.com/css/4edda76fcf5... https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/design.css — 200 — 10.9 KiB — 27 ms — h2https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,100..900;1,100..900&display=swap — 200 — 2.1 KiB — 97 ms — h2https://cdn.theregister.com/chrome/masthead.371adbcb.csscdn.theregister.com/chrome/masthead... https://cdn.theregister.com/chrome/masthead.371adbcb.css — 200 — 6.6 KiB — 95 ms — h2https://cdn.theregister.com/chrome/footer.61345fed.csscdn.theregister.com/chrome/footer.6... https://cdn.theregister.com/chrome/footer.61345fed.css — 200 — 3.5 KiB — 96 ms — h2https://assets.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/scaffolding.cssassets.theregister.com/css/4edda76f... https://assets.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/scaffolding.css — 200 — 3.3 KiB — 115 ms — h3https://assets.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/design.cssassets.theregister.com/css/4edda76f... https://assets.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/design.css — 200 — 11.1 KiB — 116 ms — h3https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/rows.csswww.theregister.com/css/4edda76fcf5... https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/rows.css — 200 — 5.7 KiB — 40 ms — h2https://assets.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.jsassets.theregister.com/design_picke... https://assets.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js — 200 — 62.6 KiB — 132 ms — h3https://cdn.theregister.com/assets/images/the_register_logo.6befe899.svgcdn.theregister.com/assets/images/t... https://cdn.theregister.com/assets/images/the_register_logo.6befe899.svg — 200 — 6.1 KiB — 95 ms — h2https://cdn.theregister.com/assets/images/the_register_vulture_logo.53c8756c.svgcdn.theregister.com/assets/images/t... https://cdn.theregister.com/assets/images/the_register_vulture_logo.53c8756c.svg — 200 — 2.5 KiB — 107 ms — h2https://cdn.theregister.com/assets/images/magnifying_glass.9cbf748e.svgcdn.theregister.com/assets/images/m... https://cdn.theregister.com/assets/images/magnifying_glass.9cbf748e.svg — 200 — 610 B — 27 ms — h2https://cdn.theregister.com/assets/images/close.77a839fd.svgcdn.theregister.com/assets/images/c... https://cdn.theregister.com/assets/images/close.77a839fd.svg — 200 — 592 B — 22 ms — h2https://cdn.theregister.com/assets/images/magnifying_glass_vulture.292e7b64.svgcdn.theregister.com/assets/images/m... https://cdn.theregister.com/assets/images/magnifying_glass_vulture.292e7b64.svg — 200 — 2.9 KiB — 22 ms — h2https://cdn.theregister.com/chrome/masthead.iife.93eb6f47.jscdn.theregister.com/chrome/masthead... https://cdn.theregister.com/chrome/masthead.iife.93eb6f47.js — 200 — 1.9 KiB — 21 ms — h3https://regmedia.co.uk/2026/04/20/shutterstock_2184335079.jpg?x=648&y=324&crop=1regmedia.co.uk/2026/04/20/shutterst... https://regmedia.co.uk/2026/04/20/shutterstock_2184335079.jpg?x=648&y=324&crop=1 — 200 — 25.5 KiB — 95 ms — h2https://www.googletagmanager.com/gtag/jswww.googletagmanager.com/gtag/js https://www.googletagmanager.com/gtag/js — 200 — 85.1 KiB — 126 ms — h2https://cdn.theregister.com/assets/images/burger_menu.5dd339c3.svgcdn.theregister.com/assets/images/b... https://cdn.theregister.com/assets/images/burger_menu.5dd339c3.svg — 200 — 337 B — 33 ms — h3https://regmedia.co.uk/2026/04/20/shutterstock_2184335079.jpg?x=1184&y=592&crop=1regmedia.co.uk/2026/04/20/shutterst... https://regmedia.co.uk/2026/04/20/shutterstock_2184335079.jpg?x=1184&y=592&crop=1 — 200 — 67.7 KiB — 85 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
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Per-script blocking time, transfer cost, and cache headers
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fundingchoicesmessages.google.com
Other
Costly
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Unattributable
Other
Costly
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www.theregister.com
Other
Costly
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pagead2.googlesyndication.com
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Costly
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Google Tag Manager
Tag Manager
Costly
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Transfer 177 KB
Unused 43%
Monthly Cost €2/mo
cdn.theregister.com
Other
Costly
Execution 213ms
Transfer 2 KB
Monthly Cost €2/mo
assets.theregister.com
Other
Optional
Execution 130ms
Transfer 63 KB
Unused 62%
Monthly Cost €1/mo
pagead2.googlesyndication.com
Other
Optional
Execution 94ms
Transfer 34 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 62ms
Transfer 85 KB
Unused 60%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • fundingchoicesmessages.google.com adds 434ms and costs ~€5/month
  • fundingchoicesmessages.google.com adds 320ms and costs ~€3/month
  • Unattributable adds 301ms and costs ~€3/month
  • www.theregister.com adds 274ms and costs ~€3/month
  • pagead2.googlesyndication.com adds 273ms and costs ~€3/month
  • Google Tag Manager adds 215ms and costs ~€2/month
  • cdn.theregister.com adds 213ms and costs ~€2/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

fundingchoicesmessages.google.com takes 434ms 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

fundingchoicesmessages.google.com takes 320ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

52% of fundingchoicesmessages.google.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

Unattributable 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

www.theregister.com takes 274ms 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

pagead2.googlesyndication.com takes 273ms 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

69% of pagead2.googlesyndication.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

Google Tag Manager takes 215ms 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

cdn.theregister.com takes 213ms 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

62% of assets.theregister.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

60% of Google Tag Manager's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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