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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
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.

6.77 s

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

10.73 s

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

646 ms

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

0.009

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

6.77 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.

10.76 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 (1.1 MiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2202ms total JS execution
FIX
2202ms total JS execution
Warning::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 435ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-JXW4...: 312ms CPU time
Warning::
Unattributable: 292ms CPU time
Warning::
https://fundingchoicesmessages.google.com/i/6978?e...: 275ms CPU time
Info::
https://pagead2.googlesyndication.com/pagead/manag...: 246ms CPU time
Warning::
Third-party scripts: 2202ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Style & Layout 23% Other 17% Script Parsing & Compilation 9% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://fundingchoicesmessages.google.com/f/AGSKWxXf5no4QYNP8u9Ha3PmLUXNonhJxJOwzvMSWFj5qe2z_09MTJMrPFzDkM_tbFWKrr1joq8_uGs4uEgumiQPDWU9liqL8IUHpmcpLpLwxirwS9x_54AUs6Yy6d6-SH0X4bvwYyV8WA==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODAyMDk5LDg1NjAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cudGhlcmVnaXN0ZXIuY29tLyIsbnVsbCxbWzgsIkRzS0dOLXFxZnJRIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDQ4NF1dXSJdLFszNSwiMTc3NjgwMjA5OSJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksImZhbHNlIl1dXQ435ms214ms38ms3rd
https://www.googletagmanager.com/gtag/js?id=G-JXW44Y23NM&cx=c&gtm=4e64h1312ms159ms49ms3rd
Unattributable292ms12ms0ms3rd
https://fundingchoicesmessages.google.com/i/6978?ers=3275ms254ms15ms3rd
https://pagead2.googlesyndication.com/pagead/managed/js/gpt/m202604160201/pubads_impl.js246ms160ms49ms3rd
https://cdn.theregister.com/chrome/masthead.iife.93eb6f47.js224ms8ms0ms3rd
https://assets.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js145ms94ms20ms3rd
https://www.theregister.com/140ms14ms2ms3rd
https://pagead2.googlesyndication.com/tag/js/gpt.js68ms60ms8ms3rd
https://www.googletagmanager.com/gtag/js66ms43ms22ms3rd
D
JS Bundles
Action
10 scripts, 323 KB unused
FIX
10 scripts, 323 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...: 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...: 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 (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 323 KB
323 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://pagead2.googlesyndication.com/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB130 KB (69%)✓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/_.js62 KB39 KB (62%)✓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/_.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/AGSKWxXf5no4QYNP8u9Ha3PmLUXNonhJxJOwzvMSWFj5qe2z_09MTJMrPFzDkM_tbFWKrr1joq8_uGs4uEgumiQPDWU9liqL8IUHpmcpLpLwxirwS9x_54AUs6Yy6d6-SH0X4bvwYyV8WA==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODAyMDk5LDg1NjAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cudGhlcmVnaXN0ZXIuY29tLyIsbnVsbCxbWzgsIkRzS0dOLXFxZnJRIl0sWzksImVuLVVTIl0sWzE4LCJbW1tudWxsLDQ4NF1dXSJdLFszNSwiMTc3NjgwMjA5OSJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksImZhbHNlIl1dXQ67 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, 50 requests
REVIEW
1.1 MB transferred, 50 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::
50 HTTP requests
Info::
Estimated 0.24 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
50 requests
0.24 g CO2 per page load
JavaScript 747.6 KiB 65%
Images 239.4 KiB 21%
Fonts 73.6 KiB 6%
CSS 50.0 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
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
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.
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/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/situatio... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 239 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
50 resources · 1.1 MB · 323 KB savings available
REVIEW
50 resources · 1.1 MB · 323 KB savings available
Warning::
Page weight 133 KB over 1MB target
Got: 1.1 MB Expected: ≤ 1 MB
Info::
~323 KB of savings available
Warning::
49 third-party resources (100% of weight)
50 resources · 1.1 MiB · 49 third-party 133.4 KiB over 1MB target
JavaScript 65% · 748.0 KiB
Image 21% · 243.0 KiB
Font 6% · 73.6 KiB
CSS 4% · 50.0 KiB
Other 2% · 24.8 KiB
Document 2% · 17.9 KiB

~323.1 KiB of savings available

Remove unused JavaScript: 323.1 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 6.8 s LCP 10.7 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 — 95 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2KFOMCnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFOMCnqEu92Fr1ME7kSn66aGLdTylUAMQXC89YmC2DPNWubEbVmUiAr0lFQm.woff2 — 14.8 KiB — 25 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 — 45 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 43 ms — font-display: swap
css2 unknown swap
Size 2 KB
Load time 95 ms
Start 185 ms
Risk FOUT — text flashes from fallback to web font
KFOMCnqEu92Fr1ME7kSn66a... woff2 swap
Size 15 KB
Load time 25 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
P5sMzZCDf9_T_10ZxCFuj5-... woff2 swap
Size 20 KB
Load time 45 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 43 ms
Start 1.1 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
50 requests over 1829ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 6.8 s LCP 10.7 shttps://theregister.co.uk// https://theregister.co.uk/ — 301 — 370 B — 65 ms — h2https://www.theregister.com/www.theregister.com/ https://www.theregister.com/ — 200 — 17.7 KiB — 116 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 — 119 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 — 34 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 — 44 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 — 95 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 — 104 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 — 106 ms — h2https://assets.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/scaffolding.cssassets.theregister.com/css/4edda76f... https://assets.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/scaffolding.css — 200 — 3.1 KiB — 69 ms — h2https://assets.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/design.cssassets.theregister.com/css/4edda76f... https://assets.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/design.css — 200 — 10.9 KiB — 70 ms — h2https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/rows.csswww.theregister.com/css/4edda76fcf5... https://www.theregister.com/css/4edda76fcf5371883ddb024c584ee91b2151f300/rows.css — 200 — 5.7 KiB — 37 ms — h2https://assets.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.jsassets.theregister.com/design_picke... https://assets.theregister.com/design_picker/31ed57829b02cd82b1d66b5255fa81ac25cfaec1/javascript/_.js — 200 — 62.4 KiB — 75 ms — h2https://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 — 106 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 — 113 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 — 29 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 — 34 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 — 50.8 KiB — 147 ms — h2https://www.googletagmanager.com/gtag/jswww.googletagmanager.com/gtag/js https://www.googletagmanager.com/gtag/js — 200 — 85.1 KiB — 141 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 — 539 B — 35 ms — h2https://regmedia.co.uk/2026/04/20/amd-cpu.jpg?x=1184&y=592&crop=1regmedia.co.uk/2026/04/20/amd-cpu.j... https://regmedia.co.uk/2026/04/20/amd-cpu.jpg?x=1184&y=592&crop=1 — 200 — 135.6 KiB — 135 ms — 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— 204 — 552 B — 87 ms — h2https://fundingchoicesmessages.google.com/el/AGSKWxXMcEGxnitjPN64LfdjLRCRugqQEh1RqNeN-guUdXMzyP1QEJQ5GSP-0JEYnQ4zNQuSEXDBW-A-_WpxG9v6nRLvl81UVZEki7fRApk7JRNjkFIwia782sc9_bGI4eU0isdf4XFM1Q==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxXMcEGxnitjPN64LfdjLRCRugqQEh1RqNeN-guUdXMzyP1QEJQ5GSP-0JEYnQ4zNQuSEXDBW-A-_WpxG9v6nRLvl81UVZEki7fRApk7JRNjkFIwia782sc9_bGI4eU0isdf4XFM1Q== — 204 — 28 B — 27 ms — h3https://fundingchoicesmessages.google.com/el/AGSKWxXMcEGxnitjPN64LfdjLRCRugqQEh1RqNeN-guUdXMzyP1QEJQ5GSP-0JEYnQ4zNQuSEXDBW-A-_WpxG9v6nRLvl81UVZEki7fRApk7JRNjkFIwia782sc9_bGI4eU0isdf4XFM1Q==fundingchoicesmessages.google.com/e... https://fundingchoicesmessages.google.com/el/AGSKWxXMcEGxnitjPN64LfdjLRCRugqQEh1RqNeN-guUdXMzyP1QEJQ5GSP-0JEYnQ4zNQuSEXDBW-A-_WpxG9v6nRLvl81UVZEki7fRApk7JRNjkFIwia782sc9_bGI4eU0isdf4XFM1Q== — 204 — 28 B — 32 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 — 45 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 — 43 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 — 26 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 — 1.9 KiB — 28 ms — h3https://pagead2.googlesyndication.com/pagead/managed/dict/m202604210101/gptpagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/managed/dict/m202604210101/gpt — 200 — 23.0 KiB — 39 ms — h3https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 61 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 2202ms · 703KB · £23/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 435ms
Transfer 67 KB
Monthly Cost £4/mo
Google Tag Manager
Tag Manager
Costly
Execution 312ms
Transfer 177 KB
Unused 39%
Monthly Cost £3/mo
Unattributable
Other
Costly
Execution 292ms
Transfer 0 KB
Monthly Cost £3/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 275ms
Transfer 70 KB
Unused 53%
Monthly Cost £3/mo
pagead2.googlesyndication.com
Other
Costly
Execution 246ms
Transfer 188 KB
Unused 69%
Monthly Cost £3/mo
cdn.theregister.com
Other
Costly
Execution 224ms
Transfer 2 KB
Monthly Cost £2/mo
assets.theregister.com
Other
Optional
Execution 145ms
Transfer 62 KB
Unused 62%
Monthly Cost £2/mo
www.theregister.com
Other
Optional
Execution 140ms
Transfer 18 KB
Monthly Cost £1/mo
pagead2.googlesyndication.com
Other
Optional
Execution 68ms
Transfer 34 KB
Monthly Cost £1/mo
Google Tag Manager
Tag Manager
Optional
Execution 66ms
Transfer 85 KB
Unused 60%
Monthly Cost £1/mo

These scripts may cost more than they're worth

  • fundingchoicesmessages.google.com adds 435ms and costs ~£4/month
  • Google Tag Manager adds 312ms and costs ~£3/month
  • Unattributable adds 292ms and costs ~£3/month
  • fundingchoicesmessages.google.com adds 275ms and costs ~£3/month
  • pagead2.googlesyndication.com adds 246ms and costs ~£3/month
  • cdn.theregister.com adds 224ms 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 435ms 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 312ms 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 292ms 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 275ms 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

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

pagead2.googlesyndication.com takes 246ms 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

cdn.theregister.com takes 224ms 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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