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https://mobileslotsite.co.uk

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
1
REVIEW
4
PASS
10
INFO
2

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

Mobile Desktop
97
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

1.26 s

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

1.96 s

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

144 ms

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

0.004

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

2.73 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.

4.65 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
10 PASS 4 REVIEW 1 FIX
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.

C
Image Optimization
Action
33 images, 0 KB saveable
REVIEW
33 images, 0 KB saveable
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/static/img/general/co... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/static/img/general/co... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/static/img/general/co... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/static/img/general/co... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://mobileslotsite.co.uk/wp-content/webp-expre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.dmca.com/Badges/dmca_protected_sml_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
33 images 415 KB
0 oversized -0 KB
6 legacy format
26 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

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

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

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

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

C
JS Execution Cost
Action
1690ms total JS execution
REVIEW
1690ms total JS execution
Warning::
https://mobileslotsite.co.uk/: 670ms CPU time
Warning::
Unattributable: 346ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-32JJ...: 320ms CPU time
Warning::
https://mobileslotsite.co.uk/static/js/all.js: 277ms CPU time
Info::
https://mobileslotsite.co.uk/wp-content/plugins/we...: 76ms CPU time
Info::
Third-party scripts: 666ms (39% of total)

Main Thread Breakdown

Script Evaluation 28% Style & Layout 27% Other 24% Script Parsing & Compilation 8% Rendering 6% Parse HTML & CSS 5%
ScriptTotalScriptingParse/CompileParty
https://mobileslotsite.co.uk/670ms6ms2ms1st
Unattributable346ms7ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-32JJXREKDD320ms204ms115ms3rd
https://mobileslotsite.co.uk/static/js/all.js277ms197ms21ms1st
https://mobileslotsite.co.uk/wp-content/plugins/webp-express/js/lazysizes.min.js76ms62ms1ms1st
B
JS Bundles
9 scripts, 121 KB unused
REVIEW
9 scripts, 121 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-32JJ...: 63 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://mobileslotsite.co.uk/static/js/all.js: 58 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 121 KB
121 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-32JJXREKDD146 KB63 KB (43%)✓3rd
https://mobileslotsite.co.uk/static/js/all.js83 KB58 KB (70%)✓1st
https://mobileslotsite.co.uk/static/js/custom.js5 KB—✓1st
https://mobileslotsite.co.uk/static/js/user.js2 KB—✓1st
https://images.dmca.com/Badges/DMCABadgeHelper.min.js1 KB—✓3rd
https://mobileslotsite.co.uk/wp-content/plugins/universal-banner-popup/resources/js/ajax.js?ver=1.01 KB—✓1st
https://mobileslotsite.co.uk/wp-content/plugins/webp-express/js/lazysizes.min.js4 KB—✓1st
https://mobileslotsite.co.uk/wp-content/plugins/wp-tt-second-offer-links/script.js?ver=1.2.41 KB—✓1st
https://mobileslotsite.co.uk/wp-content/plugins/wp-tt-rating-stars/static/js/rating.js?ver=5.4.22 KB—✓1st

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
824 KB transferred, 53 requests
PASS
824 KB transferred, 53 requests
Info::
Page weighs 1.7 MB (824 KB transferred)
Info::
53 HTTP requests
Info::
Estimated 0.17 g CO2 per page load
824 KB / 2.4 MB budget
824 KB transferred
53 requests
0.17 g CO2 per page load
Images 415.2 KiB 50%
JavaScript 243.1 KiB 30%
Fonts 106.9 KiB 13%
CSS 32.4 KiB 4%
HTML 22.2 KiB 3%
Other 2.3 KiB 0%
Other 1.4 KiB 0%
Other 552 B 0%
0 2.4 MB 4.9 MB
Under budget
A
Third-Party Impact
31% third-party, 0 ms blocking
PASS
31% third-party, 0 ms blocking
Info::
Third-party code accounts for 31% of page weight (256.7 KiB of 824.0 KiB)
Info::
Third-party blocking time is low (0 ms)
69%
31%
First-party Third-party
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
5 fonts (107 KB)
PASS
5 fonts (107 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

107 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.3 s LCP 2.0 shttps://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh6UVSwiPGQ.woff2S6u9w4BMUTPHh6UVSwiPGQ.... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh6UVSwiPGQ.woff2 — 22.3 KiB — 60 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh50XSwiPGQ.woff2S6u9w4BMUTPHh50XSwiPGQ.... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh50XSwiPGQ.woff2 — 21.9 KiB — 62 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v14/S6uyw4BMUTPHjx4wXg.woff2S6uyw4BMUTPHjx4wXg.woff2 https://fonts.gstatic.com/s/lato/v14/S6uyw4BMUTPHjx4wXg.woff2 — 22.8 KiB — 70 ms — font-display: swaphttps://fonts.gstatic.com/s/arsenal/v3/wXKrE3kQtZQ4pF3D51jcAA.woff2wXKrE3kQtZQ4pF3D51jcAA.... https://fonts.gstatic.com/s/arsenal/v3/wXKrE3kQtZQ4pF3D51jcAA.woff2 — 17.2 KiB — 68 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh7USSwiPGQ.woff2S6u9w4BMUTPHh7USSwiPGQ.... https://fonts.gstatic.com/s/lato/v14/S6u9w4BMUTPHh7USSwiPGQ.woff2 — 22.7 KiB — 63 ms — font-display: swap
S6u9w4BMUTPHh6UVSwiPGQ.... woff2 swap
Size 22 KB
Load time 60 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh50XSwiPGQ.... woff2 swap
Size 22 KB
Load time 62 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
S6uyw4BMUTPHjx4wXg.woff2 woff2 swap
Size 23 KB
Load time 70 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
wXKrE3kQtZQ4pF3D51jcAA.... woff2 swap
Size 17 KB
Load time 68 ms
Start 1.4 s
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh7USSwiPGQ.... woff2 swap
Size 23 KB
Load time 63 ms
Start 1.4 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
6 hints, 0 missing preconnects
PASS
6 hints, 0 missing preconnects
Info::
Page uses 6 resource hint(s)

Current Resource Hints

preconnect
1
preload
4
dns-prefetch
1
prefetch
—

6 resource hints configured

A+
Page Weight Inventory
53 resources · 824 KB · 121 KB savings available
PASS
53 resources · 824 KB · 121 KB savings available
Info::
Within 1MB page-weight target
Got: 824 KB
Info::
~121 KB of savings available
Info::
14 third-party resources (31% of weight)
53 resources · 824.0 KiB · 14 third-party Within 1MB page-weight target
Image 51% · 417.5 KiB
JavaScript 30% · 243.1 KiB
Font 13% · 106.9 KiB
CSS 4% · 32.4 KiB
Document 3% · 22.2 KiB
Other 0% · 1.9 KiB

~121.4 KiB of savings available

Remove unused JavaScript: 121.4 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
Network Waterfall
53 requests over 5614ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 1.3 s LCP 2.0 shttps://mobileslotsite.co.uk// https://mobileslotsite.co.uk/ — 200 — 22.2 KiB — 1.2 s — h2https://www.googletagmanager.com/gtag/js?id=G-32JJXREKDDwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-32JJXREKDD — 200 — 146.0 KiB — 154 ms — h2https://mobileslotsite.co.uk/static/css/main.min.css/static/css/main.min.css https://mobileslotsite.co.uk/static/css/main.min.css — 200 — 30.7 KiB — 57 ms — h2https://mobileslotsite.co.uk/static/js/all.js/static/js/all.js https://mobileslotsite.co.uk/static/js/all.js — 200 — 82.9 KiB — 81 ms — h2https://mobileslotsite.co.uk/static/js/custom.js/static/js/custom.js https://mobileslotsite.co.uk/static/js/custom.js — 200 — 4.5 KiB — 49 ms — h2https://mobileslotsite.co.uk/static/js/user.js/static/js/user.js https://mobileslotsite.co.uk/static/js/user.js — 200 — 1.8 KiB — 48 ms — h2https://mobileslotsite.co.uk/wp-content/plugins/universal-banner-popup/resources/css/main.min.css?ver=1.0/wp-content/plugins/universal-banne... https://mobileslotsite.co.uk/wp-content/plugins/universal-banner-popup/resources/css/main.min.css?ver=1.0 — 200 — 1.7 KiB — 65 ms — h2https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/uploads/2021/03/logo_mobileslotsite.png.webp/wp-content/webp-express/webp-image... https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/uploads/2021/03/logo_mobileslotsite.png.webp — 200 — 3.0 KiB — 59 ms — h2https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/static/img/content/banner-slide-1-xs.jpg.webp/wp-content/webp-express/webp-image... https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/static/img/content/banner-slide-1-xs.jpg.webp — 200 — 9.4 KiB — 50 ms — h2https://mobileslotsite.co.uk/static/img/general/cork-360-260.png/static/img/general/cork-360-260.pn... https://mobileslotsite.co.uk/static/img/general/cork-360-260.png — 200 — 2.1 KiB — 58 ms — h3https://images.dmca.com/Badges/DMCABadgeHelper.min.jsimages.dmca.com/Badges/DMCABadgeHel... https://images.dmca.com/Badges/DMCABadgeHelper.min.js — 200 — 804 B — 75 ms — h2https://mobileslotsite.co.uk/wp-content/plugins/universal-banner-popup/resources/js/ajax.js?ver=1.0/wp-content/plugins/universal-banne... https://mobileslotsite.co.uk/wp-content/plugins/universal-banner-popup/resources/js/ajax.js?ver=1.0 — 200 — 712 B — 32 ms — h3https://mobileslotsite.co.uk/wp-content/plugins/webp-express/js/lazysizes.min.js/wp-content/plugins/webp-express/js... https://mobileslotsite.co.uk/wp-content/plugins/webp-express/js/lazysizes.min.js — 200 — 4.0 KiB — 53 ms — h3https://mobileslotsite.co.uk/wp-content/plugins/wp-tt-second-offer-links/script.js?ver=1.2.4/wp-content/plugins/wp-tt-second-of... https://mobileslotsite.co.uk/wp-content/plugins/wp-tt-second-offer-links/script.js?ver=1.2.4 — 200 — 723 B — 52 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h3https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/uploads/content-manager/slot/vpymhcEDSlQ22kos.jpg.webp/wp-content/webp-express/webp-image... https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/uploads/content-manager/slot/vpymhcEDSlQ22kos.jpg.webp — 200 — 12.8 KiB — 2.7 s — h3https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/uploads/content-manager/slot/g9VlihEJm17OzDsB.jpg.webp/wp-content/webp-express/webp-image... https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/uploads/content-manager/slot/g9VlihEJm17OzDsB.jpg.webp — 200 — 17.6 KiB — 2.7 s — h3https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/uploads/content-manager/slot/TnPWYWwxxM4OqkIy.jpg.webp/wp-content/webp-express/webp-image... https://mobileslotsite.co.uk/wp-content/webp-express/webp-images/uploads/content-manager/slot/TnPWYWwxxM4OqkIy.jpg.webp — 200 — 22.5 KiB — 2.8 s — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
39% of JavaScript execution is third-party
First-party Third-party 666ms · 146KB · £10/mo
Unattributable
Other
Costly
Execution 346ms
Transfer 0 KB
Monthly Cost £5/mo
Google Tag Manager
Tag Manager
Costly
Execution 320ms
Transfer 146 KB
Unused 43%
Monthly Cost £5/mo

These scripts may cost more than they're worth

  • Unattributable adds 346ms and costs ~£5/month
  • Google Tag Manager adds 320ms and costs ~£5/month

Unattributable takes 346ms 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 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

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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