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https://grind.co.uk

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
4
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
24
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
80
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.
85
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.

995 ms

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

5.91 s

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

375 ms

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

0.788

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

11.47 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.

10.77 s

Page Load Progression

2.6 s
5.3 s
7.9 s
10.5 s
13.2 s
15.8 s
18.5 s
21.1 s
Checks
14
6 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
16.1 MB transferred, 561 requests
FIX
16.1 MB transferred, 561 requests
Critical::
Page weighs 30.3 MB (16.1 MB transferred)
Warning::
Images are 5.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 5.8 MB
Warning::
JavaScript is 3.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.8 MB
Info::
Fonts are 409 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 409 KB
Warning::
561 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 3.4 g CO2 per page load
16.1 MB / 2.4 MB budget
16.1 MB transferred
561 requests
3.4 g CO2 per page load
Images 5.8 MiB 36%
Other 4.6 MiB 29%
JavaScript 3.8 MiB 23%
Other 1.2 MiB 7%
Fonts 408.9 KiB 2%
HTML 188.3 KiB 1%
CSS 111.7 KiB 1%
Other 78.3 KiB 0%
Other 20.3 KiB 0%
Other 16.3 KiB 0%
Other 1.6 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

F
JS Execution Cost
Action
10258ms total JS execution
FIX
10258ms total JS execution
Warning::
https://grind.co.uk/pages/en-us: 4188ms CPU time
Warning::
Unattributable: 1308ms CPU time
Warning::
https://grind.co.uk/cdn/shop/t/207/assets/theme.js...: 1067ms CPU time
Warning::
https://grind.co.uk/cdn/wpm/b0e8c7c7aw41bd75a1p837...: 543ms CPU time
Warning::
https://grind.co.uk/cdn/shop/t/207/assets/vendor.j...: 433ms CPU time
Info::
Third-party scripts: 3493ms (34% of total)

Main Thread Breakdown

Script Evaluation 38% Other 35% Style & Layout 10% Rendering 9% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://grind.co.uk/pages/en-us4188ms96ms15ms1st
Unattributable1308ms57ms0ms3rd
https://grind.co.uk/cdn/shop/t/207/assets/theme.js?v1.0.1&v=702342207583004109817751412791067ms963ms8ms1st
https://grind.co.uk/cdn/wpm/b0e8c7c7aw41bd75a1p837d7fd4m8b145375m.js543ms467ms25ms1st
https://grind.co.uk/cdn/shop/t/207/assets/vendor.js?v=30099029874421081791766411189433ms278ms27ms1st
https://cdn.optimizely.com/js/25879780104.js412ms200ms74ms3rd
https://static-tracking.klaviyo.com/onsite/js/build-preview/commit-98747c9b1816a2f78e748cdc073a286a0296d9f7/1011.fa12d00c7a08724d2839.js270ms212ms1ms3rd
https://cdn.shopify.com/extensions/019d485d-136a-77a6-822c-77732ebc370b/littledata-shopify-tracker-122/assets/colibrius-g.js256ms243ms7ms3rd
https://grind.co.uk/cdn/s/trekkie.storefront.e683ac02f599017ff9915d0144977db42ea1653f.min.js244ms116ms18ms1st
https://assets.gorgias.chat/build/static/js/279.6ba6eb825556cdb4.js239ms185ms6ms3rd

Showing top 10 of 22 scripts

F
JS Bundles
Action
252 scripts, 1.2 MB unused
FIX
252 scripts, 1.2 MB unused
Warning::
https://www.googletagmanager.com/gtag/destination?...: 105 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://grind.co.uk/cdn/shop/t/207/assets/wizard.j...: 81 KB unused (29%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MGR...: 62 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MGR...: 62 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MGR...: 62 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.2 MB
1206 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/destination?id=AW-794865512&cx=c&gtm=4e6470h2143 KB105 KB (73%)✓3rd
https://grind.co.uk/cdn/shop/t/207/assets/wizard.js?v11775636092824281 KB81 KB (29%)✓1st
https://www.googletagmanager.com/gtm.js?id=GTM-MGRCJHV0 KB62 KB (38%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MGRCJHV167 KB62 KB (38%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MGRCJHV166 KB62 KB (38%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-T4M08DYMXB175 KB61 KB (35%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-T4M08DYMXB0 KB61 KB (35%)✓3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMw.js110 KB57 KB (52%)✓3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMw.js110 KB57 KB (52%)✓3rd
https://grind.co.uk/cdn/shop/t/207/assets/vendor.js?v=300990298744210817917664111890 KB57 KB (69%)✓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

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.
Info::
ETag present — enables conditional (304) responses

No Cache-Control header

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

B
Third-Party Impact
54% third-party, 0 ms blocking
REVIEW
54% third-party, 0 ms blocking
Warning::
Third-party code accounts for 54% of page weight (8.7 MiB of 16.1 MiB)
Info::
Third-party blocking time is low (0 ms)
46%
54%
First-party Third-party
C
Image Optimization
Action
107 images, 0 KB saveable
REVIEW
107 images, 0 KB saveable
Warning::
https://grind.co.uk/cdn/shop/files/new-packaging-l... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://grind.co.uk/cdn/shop/files/firstdelivery_7... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://grind.co.uk/cdn/shop/files/Homepage_Block3... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://grind.co.uk/cdn/shop/files/Grind-TVC_Endfr... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://grind.co.uk/cdn/shop/files/es_c2c6557e-425... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://grind.co.uk/cdn/shop/files/seasonal-lifest... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://d3k81ch9hvuctc.cloudfront.net/company/KD7t... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://grind.co.uk/cdn/shop/files/guardian_140x.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://grind.co.uk/cdn/shop/files/pods-tin-lifest... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
107 images 4.3 MB
0 oversized -0 KB
26 legacy format
9 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

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
16 fonts (409 KB)
PASS
16 fonts (409 KB)
Info::
16 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

16

409 KB total

Render-blocking

0

of 16

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 995 ms LCP 5.9 shttps://grind.co.uk/cdn/shop/t/207/assets/ApercuRegular.woff?v=164626992907334924521648547274ApercuRegular.woff https://grind.co.uk/cdn/shop/t/207/assets/ApercuRegular.woff?v=164626992907334924521648547274 — 33.6 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/b18cf9/00000000000000007735f8a7/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/b18cf9/00000000000000007735f8a7/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 29.2 KiB — 0 ms — font-display: swaphttps://use.typekit.net/af/fc9892/00000000000000007736878f/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i4&v=3l https://use.typekit.net/af/fc9892/00000000000000007736878f/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i4&v=3 — 30.2 KiB — 0 ms — font-display: swaphttps://grind.co.uk/cdn/shop/t/207/assets/ApercuBold.woff?v=91623491051789556331648547289ApercuBold.woff https://grind.co.uk/cdn/shop/t/207/assets/ApercuBold.woff?v=91623491051789556331648547289 — 46.0 KiB — 0 ms — font-display: swaphttps://grind.co.uk/cdn/shop/t/207/assets/ApercuMedium.woff?v=158718178338810366151648547274ApercuMedium.woff https://grind.co.uk/cdn/shop/t/207/assets/ApercuMedium.woff?v=158718178338810366151648547274 — 23.3 KiB — 0 ms — font-display: swaphttps://grind.co.uk/cdn/shop/t/207/assets/ApercuRegular.woff?v=164626992907334924521648547274ApercuRegular.woff https://grind.co.uk/cdn/shop/t/207/assets/ApercuRegular.woff?v=164626992907334924521648547274 — 0 B — 0 ms — font-display: swaphttps://grind.co.uk/cdn/shop/t/207/assets/ApercuMedium.woff?v=158718178338810366151648547274ApercuMedium.woff https://grind.co.uk/cdn/shop/t/207/assets/ApercuMedium.woff?v=158718178338810366151648547274 — 0 B — 0 ms — font-display: swaphttps://grind.co.uk/cdn/shop/t/207/assets/ApercuBold.woff?v=91623491051789556331648547289ApercuBold.woff https://grind.co.uk/cdn/shop/t/207/assets/ApercuBold.woff?v=91623491051789556331648547289 — 0 B — 0 ms — font-display: swaphttps://use.typekit.net/af/b18cf9/00000000000000007735f8a7/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/b18cf9/00000000000000007735f8a7/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 0 B — 0 ms — font-display: swaphttps://use.typekit.net/af/fc9892/00000000000000007736878f/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i4&v=3l https://use.typekit.net/af/fc9892/00000000000000007736878f/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i4&v=3 — 0 B — 0 ms — font-display: swaphttps://use.typekit.net/af/ba7126/00000000000000007735f8a4/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3l https://use.typekit.net/af/ba7126/00000000000000007735f8a4/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3 — 27.7 KiB — 0 ms — font-display: swaphttps://grind.co.uk/cdn/shop/t/207/assets/fa-brands-400.woff2fa-brands-400.woff2 https://grind.co.uk/cdn/shop/t/207/assets/fa-brands-400.woff2 — 115.7 KiB — 0 ms — font-display: swaphttps://fonts.bunny.net/inter/files/inter-latin-400-normal.woff2inter-latin-400-normal.... https://fonts.bunny.net/inter/files/inter-latin-400-normal.woff2 — 23.8 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0123/2928/7737/t/207/assets/ApercuRegular.woff?v=164626992907334924521648547274ApercuRegular.woff https://cdn.shopify.com/s/files/1/0123/2928/7737/t/207/assets/ApercuRegular.woff?v=164626992907334924521648547274 — 33.5 KiB — 0 ms — font-display: swaphttps://cdn.shopify.com/s/files/1/0123/2928/7737/t/207/assets/ApercuBold.woff?v=91623491051789556331648547289ApercuBold.woff https://cdn.shopify.com/s/files/1/0123/2928/7737/t/207/assets/ApercuBold.woff?v=91623491051789556331648547289 — 46.0 KiB — 0 ms — font-display: swaphttps://fonts.bunny.net/inter/files/inter-latin-400-normal.woff2inter-latin-400-normal.... https://fonts.bunny.net/inter/files/inter-latin-400-normal.woff2 — 0 B — 0 ms — font-display: swap
ApercuRegular.woff woff swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
l woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 30 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
ApercuBold.woff woff swap
Size 46 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ApercuMedium.woff woff swap
Size 23 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ApercuRegular.woff woff swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ApercuMedium.woff woff swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ApercuBold.woff woff swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
l woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 28 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 116 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
inter-latin-400-normal.... woff2 swap
Size 24 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
ApercuRegular.woff woff swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ApercuBold.woff woff swap
Size 46 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
inter-latin-400-normal.... woff2 swap
Size 0 KB
Load time 0 ms
Start 0 ms
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 ~113 KB and ~226 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
561 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
34% of JavaScript execution is third-party
First-party Third-party 3493ms · 777KB · £18/mo
Unattributable
Other
Costly
Execution 1308ms
Transfer 0 KB
Monthly Cost £7/mo
Optimizely
A/B Testing
Costly
Execution 412ms
Transfer 0 KB
Unused 45%
Monthly Cost £2/mo
static-tracking.klaviyo.com
Other
Costly
Execution 270ms
Transfer 8 KB
Monthly Cost £1/mo
cdn.shopify.com
Other
Costly
Execution 256ms
Transfer 0 KB
Monthly Cost £1/mo
assets.gorgias.chat
Other
Costly
Execution 239ms
Transfer 93 KB
Unused 44%
Monthly Cost £1/mo
Microsoft Clarity
Session Replay
Costly
Execution 226ms
Transfer 26 KB
Monthly Cost £1/mo
static.klaviyo.com
Other
Optional
Execution 149ms
Transfer 10 KB
Monthly Cost £1/mo
Google Tag Manager
Tag Manager
Optional
Execution 133ms
Transfer 0 KB
Unused 35%
Monthly Cost £1/mo
Google Tag Manager
Tag Manager
Optional
Execution 103ms
Transfer 143 KB
Unused 38%
Monthly Cost £1/mo
Google Tag Manager
Tag Manager
Optional
Execution 95ms
Transfer 167 KB
Unused 38%
Monthly Cost £0/mo
Google Tag Manager
Tag Manager
Optional
Execution 92ms
Transfer 143 KB
Unused 38%
Monthly Cost £0/mo
analytics.tiktok.com
Other
Optional
Execution 84ms
Transfer 110 KB
Unused 52%
Monthly Cost £0/mo
assets.gorgias.chat
Other
Optional
Execution 71ms
Transfer 38 KB
Monthly Cost £0/mo
Facebook Pixel
Advertising
Optional
Execution 55ms
Transfer 40 KB
Monthly Cost £0/mo

These scripts may cost more than they're worth

  • Unattributable adds 1308ms and costs ~£7/month
  • Optimizely adds 412ms and costs ~£2/month
  • static-tracking.klaviyo.com adds 270ms and costs ~£1/month
  • cdn.shopify.com adds 256ms and costs ~£1/month
  • assets.gorgias.chat adds 239ms and costs ~£1/month
  • Microsoft Clarity adds 226ms and costs ~£1/month

Unattributable takes 1308ms 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

Optimizely takes 412ms 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

static-tracking.klaviyo.com takes 270ms 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.shopify.com takes 256ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

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

Source: web.dev

assets.gorgias.chat takes 239ms 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

Microsoft Clarity takes 226ms 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 analytics.tiktok.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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