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https://samaritans.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
3
REVIEW
4
PASS
8
INFO
2

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

Mobile Desktop
59
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
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.

3.09 s

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

9.43 s

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

394 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.

3.74 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.

10.92 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 4 REVIEW 3 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 (1.7 MiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
41 resources · 1.7 MB · 290 KB savings available
FIX
41 resources · 1.7 MB · 290 KB savings available
Warning::
Page weight 729 KB over 1MB target
Got: 1.7 MB Expected: ≤ 1 MB
Info::
~290 KB of savings available
Warning::
40 third-party resources (100% of weight)
Info::
3 resources over 200KB
41 resources · 1.7 MiB · 40 third-party 729.1 KiB over 1MB target
JavaScript 43% · 760.2 KiB
Image 39% · 677.1 KiB
Font 7% · 123.3 KiB
Document 6% · 102.1 KiB
CSS 4% · 72.9 KiB
Other 1% · 17.4 KiB

~289.9 KiB of savings available

Remove unused JavaScript: 289.9 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
Page Weight Budget
Action
1.7 MB transferred, 41 requests
REVIEW
1.7 MB transferred, 41 requests
Info::
Page weighs 5.0 MB (1.7 MB transferred)
Warning::
JavaScript is 732 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 732 KB
Info::
41 HTTP requests
Info::
Estimated 0.36 g CO2 per page load
1.7 MB / 2.4 MB budget
1.7 MB transferred
41 requests
0.36 g CO2 per page load
JavaScript 731.9 KiB 42%
Images 675.4 KiB 39%
Fonts 123.3 KiB 7%
HTML 102.1 KiB 6%
CSS 69.0 KiB 4%
Other 46.4 KiB 3%
Other 3.4 KiB 0%
Other 1.5 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

B
Image Optimization
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Warning::
https://media.samaritans.org/images/Heldiney-homep... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
7 images 675 KB
0 oversized -0 KB
7 legacy format
1 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

C
JS Execution Cost
Action
1889ms total JS execution
REVIEW
1889ms total JS execution
Warning::
Unattributable: 383ms CPU time
Warning::
https://www.samaritans.org/static/js/website.05162...: 313ms CPU time
Warning::
https://www.samaritans.org/: 301ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PCS...: 268ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-YPYK...: 258ms CPU time
Warning::
Third-party scripts: 1889ms (100% of total)

Main Thread Breakdown

Script Evaluation 51% Other 19% Script Parsing & Compilation 14% Style & Layout 7% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
Unattributable383ms119ms0ms3rd
https://www.samaritans.org/static/js/website.051629d080b6.js313ms150ms125ms3rd
https://www.samaritans.org/301ms6ms3ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PCSWFRF268ms209ms39ms3rd
https://www.googletagmanager.com/gtag/js?id=G-YPYKJ55JNV&cx=c&gtm=4e64k1h1258ms214ms36ms3rd
https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/otBannerSdk.js207ms131ms42ms3rd
https://script.platform.veracitytrustnetwork.com/4.13.0/index.js159ms135ms12ms3rd
C
JS Bundles
Action
16 scripts, 290 KB unused
REVIEW
16 scripts, 290 KB unused
Warning::
https://www.samaritans.org/static/js/website.05162...: 90 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PCS...: 80 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-YPYK...: 65 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn-apac.onetrust.com/scripttemplates/2024...: 55 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 290 KB
290 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.samaritans.org/static/js/website.051629d080b6.js242 KB90 KB (37%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PCSWFRF173 KB80 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-YPYKJ55JNV&cx=c&gtm=4e64k1h1157 KB65 KB (42%)✓3rd
https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/otBannerSdk.js104 KB55 KB (52%)✓3rd
https://www.samaritans.org/static/js/donate.1bc98acca668.js2 KB—✓3rd
https://cdn-apac.onetrust.com/scripttemplates/otSDKStub.js9 KB—✓3rd
https://cdn-apac.onetrust.com/consent/0a5bb920-9967-47b7-8e06-2f6741e0a1aa/0a5bb920-9967-47b7-8e06-2f6741e0a1aa.json2 KB—✓3rd
https://cdn-apac.onetrust.com/consent/0a5bb920-9967-47b7-8e06-2f6741e0a1aa/018e13a9-71dd-75b7-ae5b-279a89bf9b9b/en.json21 KB—✓3rd
https://instant.page/5.2.01 KB—✓3rd
https://script.platform.veracitytrustnetwork.com/loader/index.js1 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

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

Source: web.dev / Lighthouse coverage

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
6 fonts (123 KB)
PASS
6 fonts (123 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

123 KB total

Render-blocking

0

of 6

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 7.0 s 8.0 s 9.0 s FCP 3.1 s LCP 9.4 shttps://www.samaritans.org/static/fonts/varah-regular.9c217261602a.woff2varah-regular.9c2172616... https://www.samaritans.org/static/fonts/varah-regular.9c217261602a.woff2 — 19.4 KiB — 48 ms — font-display: swaphttps://www.samaritans.org/static/fonts/varah-regular-italic.5e720f5e10a4.woff2varah-regular-italic.5e... https://www.samaritans.org/static/fonts/varah-regular-italic.5e720f5e10a4.woff2 — 22.3 KiB — 32 ms — font-display: swaphttps://www.samaritans.org/static/fonts/varah-light.4f6dfad2474d.woff2varah-light.4f6dfad2474... https://www.samaritans.org/static/fonts/varah-light.4f6dfad2474d.woff2 — 18.8 KiB — 30 ms — font-display: swaphttps://www.samaritans.org/static/fonts/varah-light-italic.d3096fe1260b.woff2varah-light-italic.d309... https://www.samaritans.org/static/fonts/varah-light-italic.d3096fe1260b.woff2 — 21.6 KiB — 47 ms — font-display: swaphttps://www.samaritans.org/static/fonts/varah-bold.8b023e719021.woff2varah-bold.8b023e719021... https://www.samaritans.org/static/fonts/varah-bold.8b023e719021.woff2 — 19.7 KiB — 47 ms — font-display: swaphttps://www.samaritans.org/static/fonts/varah-bold-italic.af214df82dfe.woff2varah-bold-italic.af214... https://www.samaritans.org/static/fonts/varah-bold-italic.af214df82dfe.woff2 — 21.6 KiB — 46 ms — font-display: swap
varah-regular.9c2172616... woff2 swap
Size 19 KB
Load time 48 ms
Start 170 ms
Risk FOUT — text flashes from fallback to web font
varah-regular-italic.5e... woff2 swap
Size 22 KB
Load time 32 ms
Start 170 ms
Risk FOUT — text flashes from fallback to web font
varah-light.4f6dfad2474... woff2 swap
Size 19 KB
Load time 30 ms
Start 171 ms
Risk FOUT — text flashes from fallback to web font
varah-light-italic.d309... woff2 swap
Size 22 KB
Load time 47 ms
Start 171 ms
Risk FOUT — text flashes from fallback to web font
varah-bold.8b023e719021... woff2 swap
Size 20 KB
Load time 47 ms
Start 171 ms
Risk FOUT — text flashes from fallback to web font
varah-bold-italic.af214... woff2 swap
Size 22 KB
Load time 46 ms
Start 173 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)
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
—
preload
6
dns-prefetch
—
prefetch
—

6 resource hints configured

A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
41 requests over 1390ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 3.1 s LCP 9.4 shttps://samaritans.org// https://samaritans.org/ — 301 — 161 B — 71 ms — h2https://www.samaritans.org/www.samaritans.org/ https://www.samaritans.org/ — 200 — 102.1 KiB — 102 ms — h2https://cdn-apac.onetrust.com/scripttemplates/otSDKStub.jscdn-apac.onetrust.com/scripttemplat... https://cdn-apac.onetrust.com/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 111 ms — h2https://www.samaritans.org/static/css/website.d310d4eaaac5.csswww.samaritans.org/static/css/websi... https://www.samaritans.org/static/css/website.d310d4eaaac5.css — 200 — 69.0 KiB — 45 ms — h2https://www.samaritans.org/static/fonts/varah-regular.9c217261602a.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-regular.9c217261602a.woff2 — 200 — 19.4 KiB — 48 ms — h2https://www.samaritans.org/static/fonts/varah-regular-italic.5e720f5e10a4.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-regular-italic.5e720f5e10a4.woff2 — 200 — 22.3 KiB — 32 ms — h2https://www.samaritans.org/static/fonts/varah-light.4f6dfad2474d.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-light.4f6dfad2474d.woff2 — 200 — 18.8 KiB — 30 ms — h2https://www.samaritans.org/static/fonts/varah-light-italic.d3096fe1260b.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-light-italic.d3096fe1260b.woff2 — 200 — 21.6 KiB — 47 ms — h2https://www.samaritans.org/static/fonts/varah-bold.8b023e719021.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-bold.8b023e719021.woff2 — 200 — 19.7 KiB — 47 ms — h2https://www.samaritans.org/static/fonts/varah-bold-italic.af214df82dfe.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-bold-italic.af214df82dfe.woff2 — 200 — 21.6 KiB — 46 ms — h2https://media.samaritans.org/images/Heldiney-homepage.2e16d0ba.fill-768x500.jpegquality-40.jpgmedia.samaritans.org/images/Heldine... https://media.samaritans.org/images/Heldiney-homepage.2e16d0ba.fill-768x500.jpegquality-40.jpg — 200 — 20.3 KiB — 362 ms — h2https://media.samaritans.org/images/1_UibKksY.2e16d0ba.fill-1100x600.jpgmedia.samaritans.org/images/1_UibKk... https://media.samaritans.org/images/1_UibKksY.2e16d0ba.fill-1100x600.jpg — 200 — 67.7 KiB — 372 ms — h2https://instant.page/5.2.0instant.page/5.2.0 https://instant.page/5.2.0 — 200 — 1.3 KiB — 118 ms — h2https://cdn-apac.onetrust.com/consent/0a5bb920-9967-47b7-8e06-2f6741e0a1aa/0a5bb920-9967-47b7-8e06-2f6741e0a1aa.jsoncdn-apac.onetrust.com/consent/0a5bb... https://cdn-apac.onetrust.com/consent/0a5bb920-9967-47b7-8e06-2f6741e0a1aa/0a5bb920-9967-47b7-8e06-2f6741e0a1aa.json — 200 — 2.2 KiB — 90 ms — h2https://media.samaritans.org/images/grace-anne-story-small-talk-save.2e16d0ba.fill-1300x1300.jpgmedia.samaritans.org/images/grace-a... https://media.samaritans.org/images/grace-anne-story-small-talk-save.2e16d0ba.fill-1300x1300.jpg — 200 — 227.5 KiB — 253 ms — h2https://www.samaritans.org/static/js/website.051629d080b6.jswww.samaritans.org/static/js/websit... https://www.samaritans.org/static/js/website.051629d080b6.js — 200 — 242.3 KiB — 36 ms — h2https://www.samaritans.org/static/js/donate.1bc98acca668.jswww.samaritans.org/static/js/donate... https://www.samaritans.org/static/js/donate.1bc98acca668.js — 200 — 2.2 KiB — 32 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-PCSWFRFwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PCSWFRF — 200 — 173.2 KiB — 210 ms — h2https://media.samaritans.org/images/Office_420_AR.width-1300.jpgmedia.samaritans.org/images/Office_... https://media.samaritans.org/images/Office_420_AR.width-1300.jpg — 200 — 114.3 KiB — 217 ms — h2https://media.samaritans.org/images/9960_AR.width-1300.jpgmedia.samaritans.org/images/9960_AR... https://media.samaritans.org/images/9960_AR.width-1300.jpg — 200 — 223.8 KiB — 234 ms — h2https://geolocation.onetrust.com/cookieconsentpub/v1/geo/locationgeolocation.onetrust.com/cookiecons... https://geolocation.onetrust.com/cookieconsentpub/v1/geo/location — 200 — 203 B — 28 ms — h2https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/otBannerSdk.jscdn-apac.onetrust.com/scripttemplat... https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/otBannerSdk.js — 200 — 104.5 KiB — 49 ms — h2https://cdn-apac.onetrust.com/consent/0a5bb920-9967-47b7-8e06-2f6741e0a1aa/018e13a9-71dd-75b7-ae5b-279a89bf9b9b/en.jsoncdn-apac.onetrust.com/consent/0a5bb... https://cdn-apac.onetrust.com/consent/0a5bb920-9967-47b7-8e06-2f6741e0a1aa/018e13a9-71dd-75b7-ae5b-279a89bf9b9b/en.json — 200 — 20.7 KiB — 49 ms — h2https://www.googletagmanager.com/gtag/js?id=G-YPYKJ55JNV&cx=c&gtm=4e64k1h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-YPYKJ55JNV&cx=c&gtm=4e64k1h1 — 200 — 157.0 KiB — 54 ms — h2https://script.platform.veracitytrustnetwork.com/loader/index.jsscript.platform.veracitytrustnetwor... https://script.platform.veracitytrustnetwork.com/loader/index.js — 200 — 1.2 KiB — 135 ms — h2https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/assets/otCenterRounded.jsoncdn-apac.onetrust.com/scripttemplat... https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/assets/otCenterRounded.json — 200 — 2.9 KiB — 30 ms — h2https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/assets/v2/otPcCenter.jsoncdn-apac.onetrust.com/scripttemplat... https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/assets/v2/otPcCenter.json — 200 — 12.6 KiB — 33 ms — h2https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/assets/otCommonStyles.csscdn-apac.onetrust.com/scripttemplat... https://cdn-apac.onetrust.com/scripttemplates/202401.2.0/assets/otCommonStyles.css — 200 — 3.9 KiB — 30 ms — h2https://cdn-apac.onetrust.com/logos/static/ot_guard_logo.svgcdn-apac.onetrust.com/logos/static/... https://cdn-apac.onetrust.com/logos/static/ot_guard_logo.svg — 200 — 479 B — 28 ms — h2https://cdn-apac.onetrust.com/logos/static/ot_company_logo.pngcdn-apac.onetrust.com/logos/static/... https://cdn-apac.onetrust.com/logos/static/ot_company_logo.png — 200 — 19.2 KiB — 31 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 3.1 s LCP 9.4 shttps://samaritans.org// https://samaritans.org/ — 301 — 161 B — 71 ms — h2https://www.samaritans.org/www.samaritans.org/ https://www.samaritans.org/ — 200 — 102.1 KiB — 102 ms — h2https://cdn-apac.onetrust.com/scripttemplates/otSDKStub.jscdn-apac.onetrust.com/scripttemplat... https://cdn-apac.onetrust.com/scripttemplates/otSDKStub.js — 200 — 9.1 KiB — 111 ms — h2https://www.samaritans.org/static/css/website.d310d4eaaac5.csswww.samaritans.org/static/css/websi... https://www.samaritans.org/static/css/website.d310d4eaaac5.css — 200 — 69.0 KiB — 45 ms — h2https://www.samaritans.org/static/fonts/varah-regular.9c217261602a.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-regular.9c217261602a.woff2 — 200 — 19.4 KiB — 48 ms — h2https://www.samaritans.org/static/fonts/varah-regular-italic.5e720f5e10a4.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-regular-italic.5e720f5e10a4.woff2 — 200 — 22.3 KiB — 32 ms — h2https://www.samaritans.org/static/fonts/varah-light.4f6dfad2474d.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-light.4f6dfad2474d.woff2 — 200 — 18.8 KiB — 30 ms — h2https://www.samaritans.org/static/fonts/varah-light-italic.d3096fe1260b.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-light-italic.d3096fe1260b.woff2 — 200 — 21.6 KiB — 47 ms — h2https://www.samaritans.org/static/fonts/varah-bold.8b023e719021.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-bold.8b023e719021.woff2 — 200 — 19.7 KiB — 47 ms — h2https://www.samaritans.org/static/fonts/varah-bold-italic.af214df82dfe.woff2www.samaritans.org/static/fonts/var... https://www.samaritans.org/static/fonts/varah-bold-italic.af214df82dfe.woff2 — 200 — 21.6 KiB — 46 ms — 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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 1889ms · 820KB · €20/mo
Unattributable
Other
Costly
Execution 383ms
Transfer 0 KB
Monthly Cost €4/mo
www.samaritans.org
Other
Costly
Execution 313ms
Transfer 242 KB
Unused 37%
Monthly Cost €3/mo
www.samaritans.org
Other
Costly
Execution 301ms
Transfer 102 KB
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 268ms
Transfer 173 KB
Unused 46%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 258ms
Transfer 157 KB
Unused 42%
Monthly Cost €3/mo
cdn-apac.onetrust.com
Other
Costly
Execution 207ms
Transfer 104 KB
Unused 52%
Monthly Cost €2/mo
script.platform.veracitytrustnetwork.com
Other
Optional
Execution 159ms
Transfer 41 KB
Monthly Cost €2/mo

These scripts may cost more than they're worth

  • Unattributable adds 383ms and costs ~€4/month
  • www.samaritans.org adds 313ms and costs ~€3/month
  • www.samaritans.org adds 301ms and costs ~€3/month
  • Google Tag Manager adds 268ms and costs ~€3/month
  • Google Tag Manager adds 258ms and costs ~€3/month
  • cdn-apac.onetrust.com adds 207ms and costs ~€2/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

Unattributable takes 383ms 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.samaritans.org takes 313ms 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.samaritans.org takes 301ms 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 268ms 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 258ms 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-apac.onetrust.com takes 207ms 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 cdn-apac.onetrust.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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