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https://thisismoney.co.uk

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
2
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
100
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
82
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.

649 ms

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

733 ms

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

6 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.

649 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.32 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
9 PASS 2 REVIEW 2 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 (450.3 KiB of 450.5 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
JS Bundles
Action
4 scripts, 160 KB unused
REVIEW
4 scripts, 160 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-K7GK...: 65 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PSD...: 61 KB unused (50%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.thisismoney.co.uk/Gf1S6B/IfPDIN/3gN/Yu...: 33 KB unused (21%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 160 KB
160 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-K7GKTZV547&cx=c&gtm=4e64m0h2155 KB65 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PSD2L8M7122 KB61 KB (50%)✓3rd
https://www.thisismoney.co.uk/Gf1S6B/IfPDIN/3gN/Yu/o-bCe8QG-s/zcr1kwhu/IxAhAQ/djJicjJ/rdQUQAg?v=d8b42128-9a10-999a-f3cc-eed570160211&t=199510417161 KB33 KB (21%)✓3rd
blob:https://www.thisismoney.co.uk/f5093c8a-eb99-44a8-975c-de895b973d4e0 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

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

Green Hosting

No green hosting detected

A+
Page Weight Budget
450 KB transferred, 12 requests
PASS
450 KB transferred, 12 requests
Info::
Page weighs 1.2 MB (450 KB transferred)
Info::
12 HTTP requests
Info::
Estimated 0.09 g CO2 per page load
450 KB / 2.4 MB budget
450 KB transferred
12 requests
0.09 g CO2 per page load
JavaScript 437.5 KiB 97%
HTML 6.3 KiB 1%
Other 5.1 KiB 1%
Other 1017 B 0%
Other 553 B 0%
0 2.4 MB 4.9 MB
Under budget
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+
Image Optimization
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
388ms total JS execution
PASS
388ms total JS execution
Warning::
https://www.thisismoney.co.uk/Gf1S6B/IfPDIN/3gN/Yu...: 254ms CPU time
Info::
Unattributable: 70ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-K7GK...: 65ms CPU time
Warning::
Third-party scripts: 388ms (100% of total)

Main Thread Breakdown

Script Evaluation 81% Other 9% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
https://www.thisismoney.co.uk/Gf1S6B/IfPDIN/3gN/Yu/o-bCe8QG-s/zcr1kwhu/IxAhAQ/djJicjJ/rdQUQAg?v=d8b42128-9a10-999a-f3cc-eed570160211&t=199510417254ms237ms9ms3rd
Unattributable70ms34ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-K7GKTZV547&cx=c&gtm=4e64m0h265ms54ms10ms3rd
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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
Page Weight Inventory
12 resources · 450 KB · 160 KB savings available
PASS
12 resources · 450 KB · 160 KB savings available
Info::
Within 1MB page-weight target
Got: 450 KB
Info::
~160 KB of savings available
Warning::
11 third-party resources (100% of weight)
12 resources · 450.5 KiB · 11 third-party Within 1MB page-weight target
JavaScript 97% · 437.5 KiB
Document 1% · 6.3 KiB
Other 1% · 3.5 KiB
Image 1% · 3.2 KiB

~160.0 KiB of savings available

Remove unused JavaScript: 160.0 KiB
Network Waterfall
12 requests over 3624ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 649 ms LCP 733 mshttps://thisismoney.co.uk// https://thisismoney.co.uk/ — 301 — 177 B — 44 ms — http/1.1https://www.thisismoney.co.uk/www.thisismoney.co.uk/ https://www.thisismoney.co.uk/ — 301 — 1.8 KiB — 67 ms — h2https://www.thisismoney.co.uk/money/index.htmlwww.thisismoney.co.uk/money/index.h... https://www.thisismoney.co.uk/money/index.html — 200 — 3.1 KiB — 97 ms — h2https://www.thisismoney.co.uk/Gf1S6B/IfPDIN/3gN/Yu/o-bCe8QG-s/zcr1kwhu/IxAhAQ/djJicjJ/rdQUQAg?v=d8b42128-9a10-999a-f3cc-eed570160211&t=199510417www.thisismoney.co.uk/Gf1S6B/IfPDIN... https://www.thisismoney.co.uk/Gf1S6B/IfPDIN/3gN/Yu/o-bCe8QG-s/zcr1kwhu/IxAhAQ/djJicjJ/rdQUQAg?v=d8b42128-9a10-999a-f3cc-eed570160211&t=199510417 — 200 — 160.6 KiB — 13 ms — h2https://www.thisismoney.co.uk/favicon.icowww.thisismoney.co.uk/favicon.ico https://www.thisismoney.co.uk/favicon.ico — 200 — 3.2 KiB — 14 ms — h2blob:https://www.thisismoney.co.uk/f5093c8a-eb99-44a8-975c-de895b973d4ewww.thisismoney.co.uk/f5093c8a-eb99... blob:https://www.thisismoney.co.uk/f5093c8a-eb99-44a8-975c-de895b973d4e — -1 — 0 B — 0 ms — https://www.thisismoney.co.uk/Gf1S6B/IfPDIN/3gN/Yu/o-bCe8QG-s/zcr1kwhu/IxAhAQ/djJicjJ/rdQUQAg?t=199510417www.thisismoney.co.uk/Gf1S6B/IfPDIN... https://www.thisismoney.co.uk/Gf1S6B/IfPDIN/3gN/Yu/o-bCe8QG-s/zcr1kwhu/IxAhAQ/djJicjJ/rdQUQAg?t=199510417 — 200 — 1017 B — 37 ms — h2https://www.thisismoney.co.uk/money/index.htmlwww.thisismoney.co.uk/money/index.h... https://www.thisismoney.co.uk/money/index.html — 403 — 3.2 KiB — 15 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-PSD2L8M7www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PSD2L8M7 — 200 — 122.0 KiB — 161 ms — h2https://www.googletagmanager.com/gtag/js?id=G-K7GKTZV547&cx=c&gtm=4e64m0h2www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-K7GKTZV547&cx=c&gtm=4e64m0h2 — 200 — 154.8 KiB — 61 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-K7GKTZV547&gtm=45je64m0h2v9102547046z89225133571za20gzb9225133571zd9225133571&_p=1776898109007&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=916037388.1776898109&frm=0&pscdl=noapi&rcb=13&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117384406~117512543~118167060&sid=1776898109&sct=1&seg=0&dl=https%3A%2F%2Fwww.thisismoney.co.uk%2Fmoney%2Findex.html&dr=https%3A%2F%2Fwww.thisismoney.co.uk%2Fmoney%2Findex.html&dt=Access%20Restricted&en=page_view&_fv=1&_nsi=1&_ss=1&ep.reference_id=0.6d251102.1776898108.15013d4&tfd=355region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-K7GKTZV547&gtm=45je64m0h2v9102547046z89225133571za20gzb9225133571zd9225133571&_p=1776898109007&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=916037388.1776898109&frm=0&pscdl=noapi&rcb=13&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117384406~117512543~118167060&sid=1776898109&sct=1&seg=0&dl=https%3A%2F%2Fwww.thisismoney.co.uk%2Fmoney%2Findex.html&dr=https%3A%2F%2Fwww.thisismoney.co.uk%2Fmoney%2Findex.html&dt=Access%20Restricted&en=page_view&_fv=1&_nsi=1&_ss=1&ep.reference_id=0.6d251102.1776898108.15013d4&tfd=355 — 204 — 553 B — 116 ms — h2https://www.thisismoney.co.uk/favicon.icowww.thisismoney.co.uk/favicon.ico https://www.thisismoney.co.uk/favicon.ico — 200 — 0 B — 1 ms — h2
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 388ms · 315KB · £4/mo
www.thisismoney.co.uk
Other
Costly
Execution 254ms
Transfer 161 KB
Unused 21%
Monthly Cost £3/mo
Unattributable
Other
Optional
Execution 70ms
Transfer 0 KB
Monthly Cost £1/mo
Google Tag Manager
Tag Manager
Optional
Execution 65ms
Transfer 155 KB
Unused 42%
Monthly Cost £1/mo

These scripts may cost more than they're worth

  • www.thisismoney.co.uk adds 254ms and costs ~£3/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

www.thisismoney.co.uk takes 254ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

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

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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