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https://mind.org.uk

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
4
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
76
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.

1.10 s

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

3.51 s

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

45 ms

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

0.000

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

1.74 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.

3.53 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 3 REVIEW 4 FIX
F
Page Weight Budget
Action
3.3 MB transferred, 52 requests
FIX
3.3 MB transferred, 52 requests
Warning::
Page weighs 5.4 MB (3.3 MB transferred)
Warning::
Images are 2.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 2.3 MB
Warning::
JavaScript is 577 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 577 KB
Info::
Fonts are 274 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 274 KB
Info::
52 HTTP requests
Info::
Estimated 0.70 g CO2 per page load
3.3 MB / 2.4 MB budget
3.3 MB transferred
52 requests
0.70 g CO2 per page load
Images 2.3 MiB 70%
JavaScript 576.8 KiB 17%
Fonts 273.6 KiB 8%
CSS 79.1 KiB 2%
Other 61.9 KiB 2%
HTML 18.6 KiB 1%
Other 15.3 KiB 0%
Other 4.8 KiB 0%
Other 3.1 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

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 (3.3 MiB of 3.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
52 resources · 3.3 MB · 195 KB savings available
FIX
52 resources · 3.3 MB · 195 KB savings available
Warning::
Page weight 2.3 MB over 1MB target
Got: 3.3 MB Expected: ≤ 1 MB
Info::
~195 KB of savings available
Warning::
51 third-party resources (100% of weight)
Info::
1 resources over 200KB
52 resources · 3.3 MiB · 51 third-party 2.3 MiB over 1MB target
Image 70% · 2.3 MiB
JavaScript 18% · 604.2 KiB
Font 8% · 273.6 KiB
CSS 2% · 84.1 KiB
Other 1% · 33.5 KiB
Document 1% · 32.7 KiB

~194.7 KiB of savings available

Remove unused JavaScript: 194.7 KiB
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
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Warning::
https://www.mind.org.uk/media/12088/girl-wearing-h... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17 images 2.3 MB
0 oversized -0 KB
7 legacy format
2 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

Performance issues directly impact user engagement and conversion rates.

B
JS Execution Cost
866ms total JS execution
REVIEW
866ms total JS execution
Info::
Unattributable: 170ms CPU time
Info::
https://www.mind.org.uk/: 158ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-M8W...: 150ms CPU time
Info::
https://cookie-cdn.cookiepro.com/scripttemplates/2...: 107ms CPU time
Info::
https://www.mind.org.uk/cdn-cgi/challenge-platform...: 103ms CPU time
Warning::
Third-party scripts: 866ms (100% of total)

Main Thread Breakdown

Script Evaluation 58% Other 18% Script Parsing & Compilation 10% Style & Layout 8% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
Unattributable170ms42ms0ms3rd
https://www.mind.org.uk/158ms21ms2ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-M8WXPV150ms116ms26ms3rd
https://cookie-cdn.cookiepro.com/scripttemplates/202603.1.0/otBannerSdk.js107ms69ms20ms3rd
https://www.mind.org.uk/cdn-cgi/challenge-platform/scripts/jsd/main.js103ms97ms1ms3rd
https://www.mind.org.uk/sc/d2940e6d.46527dfa.4d1482c6.bfbdf8c8.305ce327.js.v981ca3d82e81d3421a92c9c44922662be812347a97ms79ms14ms3rd
https://c.webtrends-optimize.com/acs/common/js/7.0/wt_lib.js82ms70ms5ms3rd
C
JS Bundles
Action
16 scripts, 195 KB unused
REVIEW
16 scripts, 195 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-M8W...: 72 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cookie-cdn.cookiepro.com/scripttemplates/2...: 69 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.mind.org.uk/sc/d2940e6d.46527dfa.4d148...: 53 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 195 KB
195 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-M8WXPV184 KB72 KB (39%)✓3rd
https://cookie-cdn.cookiepro.com/scripttemplates/202603.1.0/otBannerSdk.js130 KB69 KB (53%)✓3rd
https://www.mind.org.uk/sc/d2940e6d.46527dfa.4d1482c6.bfbdf8c8.305ce327.js.v981ca3d82e81d3421a92c9c44922662be812347a82 KB53 KB (68%)✓3rd
https://c.webtrends-optimize.com/acs/common/js/5.4/common.js7 KB—✓3rd
https://www.mind.org.uk/assets/js/jquery-3.5.1.min.js41 KB—✓3rd
https://cookie-cdn.cookiepro.com/consent/0bcde20a-e18d-454e-8ca5-038947d49640/0bcde20a-e18d-454e-8ca5-038947d49640.json2 KB—✓3rd
https://cookie-cdn.cookiepro.com/scripttemplates/otSDKStub.js9 KB—✓3rd
https://mindn11116.pcapredict.com/js/sensor.js17 KB—✗3rd
https://c.webtrends-optimize.com/acs/common/js/5.4/sizzle.min.js8 KB—✓3rd
https://c.webtrends-optimize.com/acs/accounts/0900ca66-2c38-4c05-8c59-8e6d58031424/js/wt.js31 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

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 (274 KB)
PASS
4 fonts (274 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

274 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 1.0 s 2.0 s 3.0 s FCP 1.1 s LCP 3.5 shttps://www.mind.org.uk/assets/fonts/MindMeridianW05-Regular.woff2MindMeridianW05-Regular... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Regular.woff2 — 35.2 KiB — 62 ms — font-display: swaphttps://www.mind.org.uk/assets/fonts/MindMeridianW05-Displayv2.woff2MindMeridianW05-Display... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Displayv2.woff2 — 78.1 KiB — 72 ms — font-display: swaphttps://www.mind.org.uk/assets/fonts/MindMeridianW05-Bold.woff2MindMeridianW05-Bold.woff2 https://www.mind.org.uk/assets/fonts/MindMeridianW05-Bold.woff2 — 34.7 KiB — 67 ms — font-display: swaphttps://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2flUhRq6tzZclQEJ-Vdg-Iui... https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2 — 125.6 KiB — 39 ms — font-display: swap
MindMeridianW05-Regular... woff2 swap
Size 35 KB
Load time 62 ms
Start 230 ms
Risk FOUT — text flashes from fallback to web font
MindMeridianW05-Display... woff2 swap
Size 78 KB
Load time 72 ms
Start 230 ms
Risk FOUT — text flashes from fallback to web font
MindMeridianW05-Bold.woff2 woff2 swap
Size 35 KB
Load time 67 ms
Start 231 ms
Risk FOUT — text flashes from fallback to web font
flUhRq6tzZclQEJ-Vdg-Iui... woff2 swap
Size 126 KB
Load time 39 ms
Start 413 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
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 ~63 KB and ~126 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
52 requests over 1204ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.1 s LCP 3.5 shttps://mind.org.uk// https://mind.org.uk/ — 301 — 173 B — 24 ms — h3https://www.mind.org.uk/www.mind.org.uk/ https://www.mind.org.uk/ — 200 — 18.6 KiB — 189 ms — h3https://www.mind.org.uk/assets/js/jquery-3.5.1.min.jswww.mind.org.uk/assets/js/jquery-3.... https://www.mind.org.uk/assets/js/jquery-3.5.1.min.js — 200 — 41.4 KiB — 51 ms — h3https://www.mind.org.uk/assets/css/styles.css?v=1.0.5www.mind.org.uk/assets/css/styles.c... https://www.mind.org.uk/assets/css/styles.css?v=1.0.5 — 200 — 78.3 KiB — 44 ms — h3https://www.mind.org.uk/assets/fonts/MindMeridianW05-Regular.woff2www.mind.org.uk/assets/fonts/MindMe... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Regular.woff2 — 200 — 35.2 KiB — 62 ms — h3https://www.mind.org.uk/assets/fonts/MindMeridianW05-Displayv2.woff2www.mind.org.uk/assets/fonts/MindMe... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Displayv2.woff2 — 200 — 78.1 KiB — 72 ms — h3https://www.mind.org.uk/assets/fonts/MindMeridianW05-Bold.woff2www.mind.org.uk/assets/fonts/MindMe... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Bold.woff2 — 200 — 34.7 KiB — 67 ms — h3https://fonts.googleapis.com/icon?family=Material+Icons&display=swapfonts.googleapis.com/icon?family=Ma... https://fonts.googleapis.com/icon?family=Material+Icons&display=swap — 200 — 823 B — 37 ms — h2https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.jscdnjs.cloudflare.com/ajax/libs/twit... https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js — 200 — 10.1 KiB — 54 ms — h3https://cookie-cdn.cookiepro.com/scripttemplates/otSDKStub.jscookie-cdn.cookiepro.com/scripttemp... https://cookie-cdn.cookiepro.com/scripttemplates/otSDKStub.js — 200 — 9.3 KiB — 52 ms — h2https://c.webtrends-optimize.com/acs/accounts/0900ca66-2c38-4c05-8c59-8e6d58031424/js/wt.jsc.webtrends-optimize.com/acs/accoun... https://c.webtrends-optimize.com/acs/accounts/0900ca66-2c38-4c05-8c59-8e6d58031424/js/wt.js — 200 — 30.6 KiB — 93 ms — h2https://www.mind.org.uk/assets/images/Mind_Squiggle_Wordmark_Blue_RGB.pngwww.mind.org.uk/assets/images/Mind_... https://www.mind.org.uk/assets/images/Mind_Squiggle_Wordmark_Blue_RGB.png — 200 — 15.5 KiB — 68 ms — h3https://www.mind.org.uk/media/l3uprbix/crowned-duck-emote.png?rmode=max&width=225&height=225www.mind.org.uk/media/l3uprbix/crow... https://www.mind.org.uk/media/l3uprbix/crowned-duck-emote.png?rmode=max&width=225&height=225 — 200 — 63.9 KiB — 68 ms — h3https://www.mind.org.uk/sc/d2940e6d.46527dfa.4d1482c6.bfbdf8c8.305ce327.js.v981ca3d82e81d3421a92c9c44922662be812347awww.mind.org.uk/sc/d2940e6d.46527df... https://www.mind.org.uk/sc/d2940e6d.46527dfa.4d1482c6.bfbdf8c8.305ce327.js.v981ca3d82e81d3421a92c9c44922662be812347a — 200 — 81.8 KiB — 58 ms — h3https://cookie-cdn.cookiepro.com/consent/0bcde20a-e18d-454e-8ca5-038947d49640/0bcde20a-e18d-454e-8ca5-038947d49640.jsoncookie-cdn.cookiepro.com/consent/0b... https://cookie-cdn.cookiepro.com/consent/0bcde20a-e18d-454e-8ca5-038947d49640/0bcde20a-e18d-454e-8ca5-038947d49640.json — 200 — 2.5 KiB — 32 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-M8WXPVwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-M8WXPV — 200 — 184.5 KiB — 163 ms — h2https://mindn11116.pcapredict.com/js/sensor.jsmindn11116.pcapredict.com/js/sensor... https://mindn11116.pcapredict.com/js/sensor.js — 200 — 17.4 KiB — 42 ms — h2https://www.mind.org.uk/assets/images/icon-search.svgwww.mind.org.uk/assets/images/icon-... https://www.mind.org.uk/assets/images/icon-search.svg — 200 — 2.8 KiB — 17 ms — h3https://www.mind.org.uk/media/3fwh133a/screenshot-2026-02-03-145327.png?width=1366&v=1dc951ce27df240www.mind.org.uk/media/3fwh133a/scre... https://www.mind.org.uk/media/3fwh133a/screenshot-2026-02-03-145327.png?width=1366&v=1dc951ce27df240 — 200 — 1.7 MiB — 221 ms — h3https://www.mind.org.uk/media/12088/girl-wearing-headphones.jpg?width=720www.mind.org.uk/media/12088/girl-we... https://www.mind.org.uk/media/12088/girl-wearing-headphones.jpg?width=720 — 200 — 75.5 KiB — 130 ms — h3https://www.mind.org.uk/media/0t0bnvkh/gettyimages-1125537230.png?v=1dbf19e95495720&width=720&format=webp&quality=80www.mind.org.uk/media/0t0bnvkh/gett... https://www.mind.org.uk/media/0t0bnvkh/gettyimages-1125537230.png?v=1dbf19e95495720&width=720&format=webp&quality=80 — 200 — 95.6 KiB — 138 ms — h3https://www.mind.org.uk/media/13260/two-people-laughing-on-sofa.jpg?rxy=0.686691192809693,0.28740847894083427&v=1db8e172de891d0&width=720&format=webp&quality=80www.mind.org.uk/media/13260/two-peo... https://www.mind.org.uk/media/13260/two-people-laughing-on-sofa.jpg?rxy=0.686691192809693,0.28740847894083427&v=1db8e172de891d0&width=720&format=webp&quality=80 — 200 — 23.9 KiB — 102 ms — h3https://www.mind.org.uk/media/8881/three-people-facing-away-with-arms-round-each-other.jpg?v=1db8e17388a2090&width=720&format=webp&quality=80www.mind.org.uk/media/8881/three-pe... https://www.mind.org.uk/media/8881/three-people-facing-away-with-arms-round-each-other.jpg?v=1db8e17388a2090&width=720&format=webp&quality=80 — 200 — 90.5 KiB — 137 ms — h3https://www.mind.org.uk/media/tj3p2ef0/illustration-white-fist-dynamic-content-only.png?width=767&height=384&v=1db8e176c6f7f40&format=webp&quality=80www.mind.org.uk/media/tj3p2ef0/illu... https://www.mind.org.uk/media/tj3p2ef0/illustration-white-fist-dynamic-content-only.png?width=767&height=384&v=1db8e176c6f7f40&format=webp&quality=80 — 200 — 25.8 KiB — 103 ms — h3https://www.mind.org.uk/media/gecbco3c/three-hands-blue.png?width=767&height=384&v=1db8e176c9d4600&format=webp&quality=80www.mind.org.uk/media/gecbco3c/thre... https://www.mind.org.uk/media/gecbco3c/three-hands-blue.png?width=767&height=384&v=1db8e176c9d4600&format=webp&quality=80 — 200 — 38.7 KiB — 107 ms — h3https://www.mind.org.uk/media/ktxbq3oe/illustration-blue-bucket-dynamic-content-only.png?width=767&height=384&v=1db8e176ca55c50&format=webp&quality=80www.mind.org.uk/media/ktxbq3oe/illu... https://www.mind.org.uk/media/ktxbq3oe/illustration-blue-bucket-dynamic-content-only.png?width=767&height=384&v=1db8e176ca55c50&format=webp&quality=80 — 200 — 36.4 KiB — 108 ms — h3https://www.mind.org.uk/media/8428/illustration-blue-phone-2-dynamic-content-only-1.png?v=1db8e1738fc9170&width=720&format=webp&quality=80www.mind.org.uk/media/8428/illustra... https://www.mind.org.uk/media/8428/illustration-blue-phone-2-dynamic-content-only-1.png?v=1db8e1738fc9170&width=720&format=webp&quality=80 — 200 — 40.5 KiB — 110 ms — h3https://www.mind.org.uk/media/8437/illustration-blue-collection-tin-dynamic-content-only-1.png?v=1db8e17405277a0&width=720&format=webp&quality=80www.mind.org.uk/media/8437/illustra... https://www.mind.org.uk/media/8437/illustration-blue-collection-tin-dynamic-content-only-1.png?v=1db8e17405277a0&width=720&format=webp&quality=80 — 200 — 26.1 KiB — 97 ms — h3https://www.mind.org.uk/media/8426/illustration-blue-notepad-dynamic-content-only.png?v=1db8e1736e682b0&width=720&format=webp&quality=80www.mind.org.uk/media/8426/illustra... https://www.mind.org.uk/media/8426/illustration-blue-notepad-dynamic-content-only.png?v=1db8e1736e682b0&width=720&format=webp&quality=80 — 200 — 38.3 KiB — 118 ms — h3https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2fonts.gstatic.com/s/materialicons/v... https://fonts.gstatic.com/s/materialicons/v145/flUhRq6tzZclQEJ-Vdg-IuiaDsNcIhQ8tQ.woff2 — 200 — 125.6 KiB — 39 ms — h3
0 ms 1.0 s 2.0 s 3.0 s FCP 1.1 s LCP 3.5 shttps://mind.org.uk// https://mind.org.uk/ — 301 — 173 B — 24 ms — h3https://www.mind.org.uk/www.mind.org.uk/ https://www.mind.org.uk/ — 200 — 18.6 KiB — 189 ms — h3https://www.mind.org.uk/assets/js/jquery-3.5.1.min.jswww.mind.org.uk/assets/js/jquery-3.... https://www.mind.org.uk/assets/js/jquery-3.5.1.min.js — 200 — 41.4 KiB — 51 ms — h3https://www.mind.org.uk/assets/css/styles.css?v=1.0.5www.mind.org.uk/assets/css/styles.c... https://www.mind.org.uk/assets/css/styles.css?v=1.0.5 — 200 — 78.3 KiB — 44 ms — h3https://www.mind.org.uk/assets/fonts/MindMeridianW05-Regular.woff2www.mind.org.uk/assets/fonts/MindMe... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Regular.woff2 — 200 — 35.2 KiB — 62 ms — h3https://www.mind.org.uk/assets/fonts/MindMeridianW05-Displayv2.woff2www.mind.org.uk/assets/fonts/MindMe... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Displayv2.woff2 — 200 — 78.1 KiB — 72 ms — h3https://www.mind.org.uk/assets/fonts/MindMeridianW05-Bold.woff2www.mind.org.uk/assets/fonts/MindMe... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Bold.woff2 — 200 — 34.7 KiB — 67 ms — h3https://fonts.googleapis.com/icon?family=Material+Icons&display=swapfonts.googleapis.com/icon?family=Ma... https://fonts.googleapis.com/icon?family=Material+Icons&display=swap — 200 — 823 B — 37 ms — h2https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.jscdnjs.cloudflare.com/ajax/libs/twit... https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.4.1/js/bootstrap.min.js — 200 — 10.1 KiB — 54 ms — h3https://cookie-cdn.cookiepro.com/scripttemplates/otSDKStub.jscookie-cdn.cookiepro.com/scripttemp... https://cookie-cdn.cookiepro.com/scripttemplates/otSDKStub.js — 200 — 9.3 KiB — 52 ms — h2https://c.webtrends-optimize.com/acs/accounts/0900ca66-2c38-4c05-8c59-8e6d58031424/js/wt.jsc.webtrends-optimize.com/acs/accoun... 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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 866ms · 442KB · £9/mo
Unattributable
Other
Optional
Execution 170ms
Transfer 0 KB
Monthly Cost £2/mo
www.mind.org.uk
Other
Optional
Execution 158ms
Transfer 19 KB
Monthly Cost £2/mo
Google Tag Manager
Tag Manager
Optional
Execution 150ms
Transfer 184 KB
Unused 39%
Monthly Cost £2/mo
cookie-cdn.cookiepro.com
Other
Optional
Execution 107ms
Transfer 130 KB
Unused 53%
Monthly Cost £1/mo
www.mind.org.uk
Other
Optional
Execution 103ms
Transfer 0 KB
Monthly Cost £1/mo
www.mind.org.uk
Other
Optional
Execution 97ms
Transfer 82 KB
Unused 68%
Monthly Cost £1/mo
c.webtrends-optimize.com
Other
Optional
Execution 82ms
Transfer 26 KB
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 cookie-cdn.cookiepro.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 www.mind.org.uk'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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