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.
528 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.15 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
166 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.
879 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.
2.02 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DPage Weight InventoryAction97 resources · 1.7 MB · 273 KB savings availableFIX
~273.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 97 resources | 1.7 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
max-age=0, no-cache, no-store
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
CPage Weight BudgetAction1.7 MB transferred, 97 requestsREVIEW
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
BImage Optimization19 images, 0 KB saveableREVIEW
BJS Execution Cost982ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.f-secure.com/_next/static/chunks/framework-106ea7071d3cfb91.js | 303ms | 285ms | 6ms | 3rd |
| Unattributable | 158ms | 4ms | 0ms | 3rd |
| https://www.f-secure.com/es | 155ms | 4ms | 0ms | 3rd |
| https://www.f-secure.com/_next/static/chunks/pages/%5B%5B...slug%5D%5D-aff25139aaebd5c3.js | 108ms | 103ms | 5ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NJ2ZKGC&l=fsData | 89ms | 74ms | 13ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-983784718&l=fsData&cx=c>m=4e64k0 | 84ms | 72ms | 12ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-84EXLXMFY5&l=fsData&cx=c>m=4e64k0 | 84ms | 57ms | 12ms | 3rd |
CJS BundlesAction64 scripts, 273 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/destination?id=AW-983784718&l=fsData&cx=c>m=4e64k0 | 137 KB | 69 KB (50%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-84EXLXMFY5&l=fsData&cx=c>m=4e64k0 | 173 KB | 67 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-NJ2ZKGC&l=fsData | 168 KB | 65 KB (39%) | ✓ | 3rd |
| https://www.f-secure.com/_next/static/chunks/pages/%5B%5B...slug%5D%5D-aff25139aaebd5c3.js | 61 KB | 29 KB (48%) | ✓ | 3rd |
| https://www.f-secure.com/_next/static/chunks/framework-106ea7071d3cfb91.js | 59 KB | 22 KB (38%) | ✓ | 3rd |
| https://www.f-secure.com/_next/static/chunks/main-07295ad2a80e531d.js | 39 KB | 21 KB (55%) | ✓ | 3rd |
| https://www.f-secure.com/_next/static/chunks/8e48c914-96ccc27f99f938a7.js | 155 KB | — | ✓ | 3rd |
| https://www.f-secure.com/_next/static/chunks/34586.58e0524c527777ab.js | 1 KB | — | ✓ | 3rd |
| https://www.f-secure.com/_next/static/chunks/64772.c327d31f5dc842e2.js | 2 KB | — | ✓ | 3rd |
| https://www.f-secure.com/_next/static/chunks/82909-4eec7a92b82696ad.js | 8 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
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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (120 KB)PASS
Web fonts
4
120 KB total
Render-blocking
0
of 4
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 Waterfall97 requests over 1853msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.f-secure.com www.f-secure.com | Other | 303ms | 59 KB | 38% | €5/mo | Costly |
Unattributable Unattributable | Other | 158ms | 0 KB | — | €3/mo | Optional |
www.f-secure.com www.f-secure.com | Other | 155ms | 41 KB | — | €2/mo | Optional |
www.f-secure.com www.f-secure.com | Other | 108ms | 61 KB | 48% | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 89ms | 168 KB | 39% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 84ms | 137 KB | 50% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 84ms | 173 KB | 39% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.f-secure.com adds 303ms and costs ~€5/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.f-secure.com takes 303ms 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
50% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev