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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
93
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.

1.12 s

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

1.37 s

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

20 ms

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

0.057

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

1.28 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.

2.23 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
15
6 PASS 4 REVIEW 3 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 (1.1 MiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
10 scripts, 321 KB unused
FIX
10 scripts, 321 KB unused
Warning::
https://pagead2.googlesyndication.com/pagead/manag...: 128 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-JXW4...: 68 KB unused (39%)
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...: 37 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://fundingchoicesmessages.google.com/i/6978?e...: 36 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 321 KB
321 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pagead2.googlesyndication.com/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB128 KB (68%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-JXW44Y23NM&cx=c&gtm=4e64h1177 KB68 KB (39%)✓3rd
https://www.googletagmanager.com/gtag/js85 KB50 KB (60%)✓3rd
https://assets.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js63 KB37 KB (60%)✓3rd
https://fundingchoicesmessages.google.com/i/6978?ers=370 KB36 KB (53%)✓3rd
https://pagead2.googlesyndication.com/tag/js/gpt.js34 KB—✓3rd
https://www.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js63 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/AGSKWxUxAWTyKjUnGtP7yoLverQyuwOopoIS89MlKQeQiO3hlazl1rWWrFMvEQ04FHR9vFWtWn1UdQU9mMUtShqxNCmtiTIMLQ2NL-dIJT9IzFntqUu6put25HcLjIXxbhkGTWSfOd3-Iw==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODAyMTE3LDgzODAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cudGhlcmVnaXN0ZXIuY29tLyIsbnVsbCxbWzgsIkRzS0dOLXFxZnJRIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDQ5M11dXSJdLFszNSwiMTc3NjgwMjExNyJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksImZhbHNlIl1dXQ67 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
1.1 MB transferred, 57 requests
REVIEW
1.1 MB transferred, 57 requests
Info::
Page weighs 3.3 MB (1.1 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::
57 HTTP requests
Info::
Estimated 0.23 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
57 requests
0.23 g CO2 per page load
JavaScript 747.9 KiB 66%
Images 213.3 KiB 19%
Fonts 73.7 KiB 7%
CSS 51.0 KiB 4%
Other 27.0 KiB 2%
HTML 17.7 KiB 2%
Other 964 B 0%
Other 611 B 0%
Other 572 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
20 images, 0 KB saveable
REVIEW
20 images, 0 KB saveable
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/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/magnifyi... 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.
20 images 213 KB
0 oversized -0 KB
17 legacy format
5 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

B
JS Execution Cost
502ms total JS execution
REVIEW
502ms total JS execution
Info::
https://www.theregister.com/: 139ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-JXW4...: 87ms CPU time
Info::
Unattributable: 77ms CPU time
Info::
https://fundingchoicesmessages.google.com/i/6978?e...: 76ms CPU time
Info::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 62ms CPU time
Warning::
Third-party scripts: 502ms (100% of total)

Main Thread Breakdown

Script Evaluation 42% Style & Layout 23% Other 17% Script Parsing & Compilation 9% Rendering 6% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.theregister.com/139ms3ms1ms3rd
https://www.googletagmanager.com/gtag/js?id=G-JXW44Y23NM&cx=c&gtm=4e64h187ms51ms10ms3rd
Unattributable77ms2ms0ms3rd
https://fundingchoicesmessages.google.com/i/6978?ers=376ms71ms4ms3rd
https://fundingchoicesmessages.google.com/f/AGSKWxUxAWTyKjUnGtP7yoLverQyuwOopoIS89MlKQeQiO3hlazl1rWWrFMvEQ04FHR9vFWtWn1UdQU9mMUtShqxNCmtiTIMLQ2NL-dIJT9IzFntqUu6put25HcLjIXxbhkGTWSfOd3-Iw==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODAyMTE3LDgzODAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cudGhlcmVnaXN0ZXIuY29tLyIsbnVsbCxbWzgsIkRzS0dOLXFxZnJRIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDQ5M11dXSJdLFszNSwiMTc3NjgwMjExNyJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksImZhbHNlIl1dXQ62ms30ms11ms3rd
https://pagead2.googlesyndication.com/pagead/managed/js/gpt/m202604160201/pubads_impl.js61ms37ms13ms3rd
B
Page Weight Inventory
57 resources · 1.1 MB · 321 KB savings available
REVIEW
57 resources · 1.1 MB · 321 KB savings available
Warning::
Page weight 109 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~321 KB of savings available
Warning::
56 third-party resources (100% of weight)
57 resources · 1.1 MiB · 56 third-party 108.7 KiB over 1MB target
JavaScript 66% · 748.3 KiB
Image 19% · 217.0 KiB
Font 7% · 73.7 KiB
CSS 4% · 51.0 KiB
Other 2% · 24.9 KiB
Document 2% · 17.9 KiB

~320.6 KiB of savings available

Remove unused JavaScript: 320.6 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 500 ms 1.0 s FCP 1.1 s LCP 1.4 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 — 78 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0klQmz24.woff2KFOMCnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0klQmz24.woff2 — 14.8 KiB — 27 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 44 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 — 44 ms — font-display: swap
css2 unknown swap
Size 2 KB
Load time 78 ms
Start 153 ms
Risk FOUT — text flashes from fallback to web font
KFOMCnqEu92Fr1ME7kSn66a... woff2 swap
Size 15 KB
Load time 27 ms
Start 893 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 44 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
P5sMzZCDf9_T_10ZxCFuj5-... woff2 swap
Size 20 KB
Load time 44 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
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
57 requests over 1789ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 1.1 s LCP 1.4 shttps://theregister.co.uk// https://theregister.co.uk/ — 301 — 396 B — 40 ms — h3https://www.theregister.com/www.theregister.com/ https://www.theregister.com/ — 200 — 17.7 KiB — 119 ms — h3https://pagead2.googlesyndication.com/tag/js/gpt.jspagead2.googlesyndication.com/tag/j... https://pagead2.googlesyndication.com/tag/js/gpt.js — 200 — 33.8 KiB — 103 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 — 62.6 KiB — 64 ms — h3https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/scaffolding.csswww.theregister.com/css/4edda76fcf5... https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/scaffolding.css — 200 — 3.3 KiB — 29 ms — h3https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/design.csswww.theregister.com/css/4edda76fcf5... https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/design.css — 200 — 11.1 KiB — 32 ms — h3https://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 — 78 ms — h2https://cdn.theregister.com/chrome/masthead.371adbcb.csscdn.theregister.com/chrome/masthead... https://cdn.theregister.com/chrome/masthead.371adbcb.css — 200 — 6.7 KiB — 73 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 — 79 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 — 43 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 — 45 ms — h3https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/rows.csswww.theregister.com/css/4edda76fcf5... https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/rows.css — 200 — 5.9 KiB — 27 ms — h3https://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 — 75 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 — 79 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 — 81 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 — 28 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 — 29 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 — 38 ms — h2https://cdn.theregister.com/chrome/masthead.iife.93eb6f47.jscdn.theregister.com/chrome/masthead... https://cdn.theregister.com/chrome/masthead.iife.93eb6f47.js — 200 — 2.1 KiB — 30 ms — h2https://regmedia.co.uk/2026/04/20/amd-cpu.jpg?x=648&y=324&crop=1regmedia.co.uk/2026/04/20/amd-cpu.j... https://regmedia.co.uk/2026/04/20/amd-cpu.jpg?x=648&y=324&crop=1 — 200 — 50.9 KiB — 112 ms — h2https://www.googletagmanager.com/gtag/jswww.googletagmanager.com/gtag/js https://www.googletagmanager.com/gtag/js — 200 — 85.1 KiB — 131 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 — 537 B — 31 ms — h2https://regmedia.co.uk/2026/04/20/amd-cpu.jpg?x=592&y=296&crop=1regmedia.co.uk/2026/04/20/amd-cpu.j... https://regmedia.co.uk/2026/04/20/amd-cpu.jpg?x=592&y=296&crop=1 — 200 — 43.3 KiB — 129 ms — h2https://cdn.theregister.com/assets/images/situation_publishing_logo_two_lines.7bfa3d3e.svgcdn.theregister.com/assets/images/s... https://cdn.theregister.com/assets/images/situation_publishing_logo_two_lines.7bfa3d3e.svg — 200 — 14.7 KiB — 35 ms — h2https://cdn.theregister.com/assets/images/situation_publishing_logo_one_line.b1e3235b.svgcdn.theregister.com/assets/images/s... https://cdn.theregister.com/assets/images/situation_publishing_logo_one_line.b1e3235b.svg — 200 — 19.3 KiB — 31 ms — h2https://assets.theregister.com/design_picker/b3abce7144e52ec67efd11fc0a98d0b441a0cfd0/graphics/favicons/site.webmanifestassets.theregister.com/design_picke... https://assets.theregister.com/design_picker/b3abce7144e52ec67efd11fc0a98d0b441a0cfd0/graphics/favicons/site.webmanifest — 200 — 964 B — 53 ms — h3https://assets.theregister.com/design_picker/c00f80f04b0eaf0123d821f6c9488fc1cb55fd0a/graphics/icons/bubble_comment_black.svgassets.theregister.com/design_picke... https://assets.theregister.com/design_picker/c00f80f04b0eaf0123d821f6c9488fc1cb55fd0a/graphics/icons/bubble_comment_black.svg — 200 — 815 B — 28 ms — h3https://assets.theregister.com/design_picker/c00f80f04b0eaf0123d821f6c9488fc1cb55fd0a/graphics/icons/bubble_comment_white.svgassets.theregister.com/design_picke... https://assets.theregister.com/design_picker/c00f80f04b0eaf0123d821f6c9488fc1cb55fd0a/graphics/icons/bubble_comment_white.svg — 200 — 704 B — 29 ms — h3https://www.theregister.com/design_picker/8abd5b416f4fff841c2ae741366892cf42e8fa79/graphics/icon/nextplatform_logo.svgwww.theregister.com/design_picker/8... https://www.theregister.com/design_picker/8abd5b416f4fff841c2ae741366892cf42e8fa79/graphics/icon/nextplatform_logo.svg — 200 — 1.1 KiB — 29 ms — h3https://www.theregister.com/design_picker/ee7b0d32b167268b4fca76bb55ac877e69d05813/graphics/icon/devclass_logo_black_horizontal.svgwww.theregister.com/design_picker/e... 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https://region1.google-analytics.com/g/collect?v=2&tid=G-JXW44Y23NM&gtm=45je64h1v887771649za200&_p=1776802117844&gcs=G100&gcd=13p3pPl2l7l1&npa=1&dma_cps=-&dma=1&tcfd=10001&_eu=AAAAAEA&are=1&cid=921019410.1776802118&frm=0&ngs=1&pscdl=denied&rcb=13&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938465~115938468~117266401~117512542&sid=1776802118&sct=1&seg=0&dl=https%3A%2F%2Fwww.theregister.com%2F&dt=The%20Register%3A%20Enterprise%20Technology%20News%20and%20Analysis&_tu=AAo&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.reg_uid=(reg_unknown)&ep.reg_auth=(reg_empty)&ep.reg_sec=reg_homepage%2Ffront&ep.reg_pt=www%20index&ep.reg_cat=(reg_empty)&ep.reg_alm=(reg_empty)&ep.reg_akwp=(reg_unknown)&ep.reg_uls=noconsent&ep.reg_prev_pt=noconsent&ep.reg_prev_ut=noconsent&ep.reg_d11=noconsent&ep.reg_d12=noconsent&ep.reg_d14=noconsent&ep.reg_ded=noconsent&ep.reg_dorg=noconsent&ep.reg_ab_var=noconsent&ep.reg_seg=noconsent&ep.reg_aid=(reg_empty)&ep.reg_asec=(reg_empty)&ep.reg_akw=(reg_unknown)&ep.reg_vfc=noconsent&ep.reg_bet=noconsent&ep.reg_noz=noconsent&ep.reg_date_modified=(reg_unknown)&ep.reg_date_published=(reg_unknown)&ep.reg_description=(reg_unknown)&ep.reg_image_url=(reg_unknown)&ep.reg_title=(reg_unknown)&ep.reg_url=(reg_unknown)&ep.anonymize_ip=true&tfd=968 — 204 — 552 B — 64 ms — h2https://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 — 44 ms — h3https://fonts.gstatic.com/s/arimo/v35/P5sMzZCDf9_T_10ZxCFuj5-v.woff2fonts.gstatic.com/s/arimo/v35/P5sMz... https://fonts.gstatic.com/s/arimo/v35/P5sMzZCDf9_T_10ZxCFuj5-v.woff2 — 200 — 20.1 KiB — 44 ms — h3https://assets.theregister.com/design_picker/b3abce7144e52ec67efd11fc0a98d0b441a0cfd0/graphics/favicons/favicon.svgassets.theregister.com/design_picke... https://assets.theregister.com/design_picker/b3abce7144e52ec67efd11fc0a98d0b441a0cfd0/graphics/favicons/favicon.svg — 200 — 1.7 KiB — 27 ms — h3https://assets.theregister.com/design_picker/b3abce7144e52ec67efd11fc0a98d0b441a0cfd0/graphics/favicons/favicon.icoassets.theregister.com/design_picke... https://assets.theregister.com/design_picker/b3abce7144e52ec67efd11fc0a98d0b441a0cfd0/graphics/favicons/favicon.ico — 200 — 2.0 KiB — 30 ms — h3https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 66 ms — h3
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 502ms · 519KB · £5/mo
www.theregister.com
Other
Optional
Execution 139ms
Transfer 18 KB
Monthly Cost £1/mo
Google Tag Manager
Tag Manager
Optional
Execution 87ms
Transfer 177 KB
Unused 39%
Monthly Cost £1/mo
Unattributable
Other
Optional
Execution 77ms
Transfer 0 KB
Monthly Cost £1/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 76ms
Transfer 70 KB
Unused 53%
Monthly Cost £1/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 62ms
Transfer 67 KB
Monthly Cost £1/mo
pagead2.googlesyndication.com
Other
Optional
Execution 61ms
Transfer 188 KB
Unused 68%
Monthly Cost £1/mo

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

53% 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

68% 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

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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