Performance
· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
3.40 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.80 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
36 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.
3.40 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.
5.37 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization22 images, 0 KB saveableREVIEW
CJS Execution CostAction1033ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.ibtimes.co.uk/ | 358ms | 57ms | 18ms | 3rd |
| Unattributable | 277ms | 7ms | 0ms | 3rd |
| https://choices.consentframework.com/js/pa/41059/c/hF7a7/cmp | 253ms | 171ms | 40ms | 3rd |
| https://g.ibtimes.co.uk/sys/js/8279496ed805304963302a16b929757e.js?v=1776800058 | 79ms | 62ms | 10ms | 3rd |
| https://cache.consentframework.com/js/pa/41059/c/hF7a7/stub | 65ms | 63ms | 1ms | 3rd |
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Page Weight Budget567 KB transferred, 41 requestsPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (131 KB)PASS
Web fonts
4
131 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
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 ~4 KB and ~8 ms
A+JS Bundles8 scripts, 31 KB unusedPASS
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://choices.consentframework.com/js/pa/41059/c/hF7a7/cmp | 135 KB | 31 KB (23%) | ✓ | 3rd |
| https://g.ibtimes.co.uk/sys/js/8279496ed805304963302a16b929757e.js?v=1776800058 | 37 KB | — | ✓ | 3rd |
| https://cache.consentframework.com/js/pa/41059/c/hF7a7/stub | 2 KB | — | ✓ | 3rd |
| https://g.ibtimes.co.uk/www/js/adblock_prebid.js | 1 KB | — | ✓ | 3rd |
| https://stats.myibtimes.com/tool/ivtcheck?callback=fq_callback&ref=&cb=1776810911628 | 0 KB | — | ✓ | 3rd |
| https://g.ibtimes.co.uk/sys/js/3a01ce5912471ea9604df7353ae5fd6f.js?v=1776800058 | 2 KB | — | ✓ | 3rd |
| https://g.ibtimes.co.uk/front/js/counter.js?a=28 | 2 KB | — | ✓ | 3rd |
| https://stats.myibtimes.com/counter/article?ack=sys_callback&site_id=1&c_what=section&a_id=0&r_id=0&c_id=0&c_url=/&referer=&device=mobile&a_editor=1&c_country=FR&xz=5&from=web&zyx=2&c_uque=1&c_ruque=1&c_visits=1&c_ts=nonpromoted&c_promo=&c_system=2&c_browser=1&c_agent=Mozilla/5.0%20(Linux;%20Android%2011;%20moto%20g%20power%20(2022))%20AppleWebKit/537.36%20(KHTML,%20like%20Gecko)%20Chrome/147.0.0.0%20Mobile%20Safari/537.36 | 0 KB | — | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
APage Weight Inventory41 resources · 567 KB · 31 KB savings availablePASS
~30.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 41 resources | 566.6 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall41 requests over 1269msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.ibtimes.co.uk www.ibtimes.co.uk | Other | 358ms | 52 KB | — | £4/mo | Costly |
Unattributable Unattributable | Other | 277ms | 0 KB | — | £3/mo | Costly |
choices.consentframework.com choices.consentframework.com | Other | 253ms | 135 KB | 23% | £3/mo | Costly |
g.ibtimes.co.uk g.ibtimes.co.uk | Other | 79ms | 37 KB | — | £1/mo | Optional |
cache.consentframework.com cache.consentframework.com | Other | 65ms | 2 KB | — | £1/mo | Optional |
These scripts may cost more than they're worth
- www.ibtimes.co.uk adds 358ms and costs ~£4/month
- Unattributable adds 277ms and costs ~£3/month
- choices.consentframework.com adds 253ms and costs ~£3/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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.ibtimes.co.uk takes 358ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Unattributable takes 277ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
choices.consentframework.com takes 253ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev