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https://mind.org.uk

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
77
GRADE
C
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
41
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.

4.32 s

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

12.16 s

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

934 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.

5.73 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.

12.27 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 (1.5 MiB of 1.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3532ms total JS execution
FIX
3532ms total JS execution
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-M8W...: 618ms CPU time
Warning::
Unattributable: 541ms CPU time
Warning::
https://www.mind.org.uk/: 540ms CPU time
Warning::
https://cookie-cdn.cookiepro.com/scripttemplates/2...: 417ms CPU time
Warning::
https://www.mind.org.uk/cdn-cgi/challenge-platform...: 413ms CPU time
Warning::
Third-party scripts: 3532ms (100% of total)

Main Thread Breakdown

Script Evaluation 60% Other 15% Script Parsing & Compilation 11% Style & Layout 8% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.googletagmanager.com/gtm.js?id=GTM-M8WXPV618ms460ms108ms3rd
Unattributable541ms149ms0ms3rd
https://www.mind.org.uk/540ms81ms8ms3rd
https://cookie-cdn.cookiepro.com/scripttemplates/202603.1.0/otBannerSdk.js417ms265ms83ms3rd
https://www.mind.org.uk/cdn-cgi/challenge-platform/scripts/jsd/main.js413ms398ms4ms3rd
https://c.webtrends-optimize.com/acs/common/js/7.0/wt_lib.js352ms302ms21ms3rd
https://www.mind.org.uk/sc/d2940e6d.46527dfa.4d1482c6.bfbdf8c8.305ce327.js.v981ca3d82e81d3421a92c9c44922662be812347a345ms252ms78ms3rd
https://www.mind.org.uk/assets/js/jquery-3.5.1.min.js111ms71ms18ms3rd
https://c.webtrends-optimize.com/acs/accounts/0900ca66-2c38-4c05-8c59-8e6d58031424/js/wt.js71ms51ms17ms3rd
https://analytics.silktide.com/f2958ebebaa485c621db052a2c24fc42.js69ms40ms10ms3rd

Showing top 10 of 11 scripts

D
Page Weight Inventory
Action
48 resources · 1.5 MB · 195 KB savings available
FIX
48 resources · 1.5 MB · 195 KB savings available
Warning::
Page weight 492 KB over 1MB target
Got: 1.5 MB Expected: ≤ 1 MB
Info::
~195 KB of savings available
Warning::
47 third-party resources (100% of weight)
48 resources · 1.5 MiB · 47 third-party 491.7 KiB over 1MB target
JavaScript 40% · 603.6 KiB
Image 32% · 488.4 KiB
Font 18% · 273.6 KiB
CSS 6% · 84.2 KiB
Other 2% · 33.3 KiB
Document 2% · 32.8 KiB

~194.6 KiB of savings available

Remove unused JavaScript: 194.6 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.

B
Page Weight Budget
1.5 MB transferred, 48 requests
REVIEW
1.5 MB transferred, 48 requests
Info::
Page weighs 3.5 MB (1.5 MB transferred)
Warning::
JavaScript is 576 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 576 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::
48 HTTP requests
Info::
Estimated 0.31 g CO2 per page load
1.5 MB / 2.4 MB budget
1.5 MB transferred
48 requests
0.31 g CO2 per page load
JavaScript 576.2 KiB 38%
Images 483.2 KiB 32%
Fonts 273.6 KiB 18%
CSS 79.0 KiB 5%
Other 62.0 KiB 4%
HTML 18.7 KiB 1%
Other 15.1 KiB 1%
Other 4.8 KiB 0%
Other 3.1 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
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.
13 images 483 KB
0 oversized -0 KB
6 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

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 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-M8WXPV185 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/wt_debugger.js2 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://c.webtrends-optimize.com/acs/common/js/5.4/sizzle.min.js8 KB—✓3rd
https://c.webtrends-optimize.com/acs/common/js/5.4/common.js7 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 4.3 s LCP 12.2 shttps://www.mind.org.uk/assets/fonts/MindMeridianW05-Regular.woff2MindMeridianW05-Regular... https://www.mind.org.uk/assets/fonts/MindMeridianW05-Regular.woff2 — 35.2 KiB — 50 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 — 60 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 — 58 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 — 14 ms — font-display: swap
MindMeridianW05-Regular... woff2 swap
Size 35 KB
Load time 50 ms
Start 175 ms
Risk FOUT — text flashes from fallback to web font
MindMeridianW05-Display... woff2 swap
Size 78 KB
Load time 60 ms
Start 175 ms
Risk FOUT — text flashes from fallback to web font
MindMeridianW05-Bold.woff2 woff2 swap
Size 35 KB
Load time 58 ms
Start 176 ms
Risk FOUT — text flashes from fallback to web font
flUhRq6tzZclQEJ-Vdg-Iui... woff2 swap
Size 126 KB
Load time 14 ms
Start 356 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+
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
48 requests over 1102ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 4.3 s LCP 12.2 shttps://mind.org.uk// https://mind.org.uk/ — 301 — 173 B — 29 ms — h3https://www.mind.org.uk/www.mind.org.uk/ https://www.mind.org.uk/ — 200 — 18.7 KiB — 124 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 — 42 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 — 78.2 KiB — 48 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 — 50 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 — 60 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 — 58 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 — 32 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 — 45 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 — 66 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 — 68 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 — 56 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 — 57 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 — 82 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 — 49 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 — 184.7 KiB — 54 ms — h2https://c.webtrends-optimize.com/acs/common/js/5.4/sizzle.min.jsc.webtrends-optimize.com/acs/common... https://c.webtrends-optimize.com/acs/common/js/5.4/sizzle.min.js — 200 — 7.6 KiB — 18 ms — h2https://c.webtrends-optimize.com/acs/common/js/5.4/common.jsc.webtrends-optimize.com/acs/common... https://c.webtrends-optimize.com/acs/common/js/5.4/common.js — 200 — 6.7 KiB — 19 ms — h2https://c.webtrends-optimize.com/acs/common/js/5.4/wt_debugger.jsc.webtrends-optimize.com/acs/common... https://c.webtrends-optimize.com/acs/common/js/5.4/wt_debugger.js — 200 — 2.0 KiB — 19 ms — h2https://c.webtrends-optimize.com/acs/common/js/7.0/wt_lib.jsc.webtrends-optimize.com/acs/common... https://c.webtrends-optimize.com/acs/common/js/7.0/wt_lib.js — 200 — 26.3 KiB — 30 ms — h2https://mindn11116.pcapredict.com/js/sensor.jsmindn11116.pcapredict.com/js/sensor... https://mindn11116.pcapredict.com/js/sensor.js — 200 — 17.4 KiB — 41 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 — 22 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 — 44 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 — 57 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 — 51 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 — 55 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 — 54 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 — 56 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 — 56 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 — 14 ms — h3
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 4.3 s LCP 12.2 shttps://mind.org.uk// https://mind.org.uk/ — 301 — 173 B — 29 ms — h3https://www.mind.org.uk/www.mind.org.uk/ https://www.mind.org.uk/ — 200 — 18.7 KiB — 124 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 — 42 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 — 78.2 KiB — 48 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 — 50 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 — 60 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 — 58 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 — 32 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 — 45 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 — 66 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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https://c.webtrends-optimize.com/acs/common/js/5.4/wt_debugger.js — 200 — 2.0 KiB — 19 ms — h2https://c.webtrends-optimize.com/acs/common/js/7.0/wt_lib.jsc.webtrends-optimize.com/acs/common... https://c.webtrends-optimize.com/acs/common/js/7.0/wt_lib.js — 200 — 26.3 KiB — 30 ms — h2https://mindn11116.pcapredict.com/js/sensor.jsmindn11116.pcapredict.com/js/sensor... https://mindn11116.pcapredict.com/js/sensor.js — 200 — 17.4 KiB — 41 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 — 22 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 — 44 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 — 57 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 — 51 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 — 55 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 — 54 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 — 56 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... 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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 3532ms · 548KB · £37/mo
Google Tag Manager
Tag Manager
Costly
Execution 618ms
Transfer 185 KB
Unused 39%
Monthly Cost £6/mo
Unattributable
Other
Costly
Execution 541ms
Transfer 0 KB
Monthly Cost £6/mo
www.mind.org.uk
Other
Costly
Execution 540ms
Transfer 19 KB
Monthly Cost £6/mo
cookie-cdn.cookiepro.com
Other
Costly
Execution 417ms
Transfer 130 KB
Unused 53%
Monthly Cost £4/mo
www.mind.org.uk
Other
Costly
Execution 413ms
Transfer 0 KB
Monthly Cost £4/mo
c.webtrends-optimize.com
Other
Costly
Execution 352ms
Transfer 26 KB
Monthly Cost £4/mo
www.mind.org.uk
Other
Costly
Execution 345ms
Transfer 82 KB
Unused 68%
Monthly Cost £4/mo
www.mind.org.uk
Other
Optional
Execution 111ms
Transfer 41 KB
Monthly Cost £1/mo
c.webtrends-optimize.com
Other
Optional
Execution 71ms
Transfer 31 KB
Monthly Cost £1/mo
analytics.silktide.com
Other
Optional
Execution 69ms
Transfer 16 KB
Monthly Cost £1/mo
mindn11116.pcapredict.com
Other
Optional
Execution 54ms
Transfer 17 KB
Monthly Cost £1/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 618ms and costs ~£6/month
  • Unattributable adds 541ms and costs ~£6/month
  • www.mind.org.uk adds 540ms and costs ~£6/month
  • cookie-cdn.cookiepro.com adds 417ms and costs ~£4/month
  • www.mind.org.uk adds 413ms and costs ~£4/month
  • c.webtrends-optimize.com adds 352ms and costs ~£4/month
  • www.mind.org.uk adds 345ms and costs ~£4/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

Google Tag Manager takes 618ms 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 541ms 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

www.mind.org.uk takes 540ms 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

cookie-cdn.cookiepro.com takes 417ms 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 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

www.mind.org.uk takes 413ms 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

c.webtrends-optimize.com takes 352ms 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

www.mind.org.uk takes 345ms 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

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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