Performance
· 15 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.
987 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.28 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
11 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.048
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
987 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.
1.82 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 sDThird-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 Optimization16 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
CJS BundlesAction21 scripts, 216 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-PRBZ42F | 186 KB | 82 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-T18E1GTPQG&cx=c>m=4e64f0 | 172 KB | 69 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-979253717&cx=c>m=4e64f0 | 145 KB | 66 KB (45%) | ✓ | 3rd |
| https://cdn-production-opera-website.operacdn.com/staticfiles/3578.js | 1 KB | — | ✓ | 3rd |
| https://cdn-production-opera-website.operacdn.com/staticfiles/3675.js | 2 KB | — | ✓ | 3rd |
| https://cdn-production-opera-website.operacdn.com/staticfiles/6139.js | 3 KB | — | ✓ | 3rd |
| https://cdn-production-opera-website.operacdn.com/staticfiles/2291.js | 1 KB | — | ✓ | 3rd |
| https://cdn-production-opera-website.operacdn.com/staticfiles/6353.js | 4 KB | — | ✓ | 3rd |
| https://cdn-production-opera-website.operacdn.com/staticfiles/9523.js | 7 KB | — | ✓ | 3rd |
| https://cdn-production-opera-website.operacdn.com/staticfiles/1819.js | 3 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
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
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
BPage Weight Inventory57 resources · 1009 KB · 216 KB savings availableREVIEW
~216.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 57 resources | 1009.3 KiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
APage Weight Budget1009 KB transferred, 57 requestsPASS
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
A+Text CompressionAll text resources are compressedPASS
A+JS Execution Cost431ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.opera.com/ | 124ms | 4ms | 1ms | 3rd |
| Unattributable | 95ms | 2ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PRBZ42F | 92ms | 73ms | 13ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-T18E1GTPQG&cx=c>m=4e64f0 | 65ms | 49ms | 11ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-979253717&cx=c>m=4e64f0 | 55ms | 43ms | 10ms | 3rd |
A+Font Loading5 fonts (131 KB)PASS
Web fonts
5
131 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall57 requests over 940msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.opera.com www.opera.com | Other | 124ms | 36 KB | — | kr23/mo | Optional |
Unattributable Unattributable | Other | 95ms | 0 KB | — | kr18/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 92ms | 186 KB | 44% | kr17/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 65ms | 172 KB | 40% | kr12/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 55ms | 145 KB | 45% | kr10/mo | Optional |
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