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.
5.36 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
8.46 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.81 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.013
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.36 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.
10.98 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction5756ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://nexus.ensighten.com/symantec/avast_web/Bootstrap.js | 1918ms | 1784ms | 56ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WPC6R3K&l=sdl | 1470ms | 1343ms | 62ms | 3rd |
| https://www.avast.com/es-es/index | 690ms | 63ms | 12ms | 3rd |
| Unattributable | 643ms | 10ms | 0ms | 3rd |
| https://assets.adobedtm.com/b29989a14bed/ccef52b414db/launch-773db4767ac4.min.js | 398ms | 349ms | 17ms | 3rd |
| https://www.avast.com/etc.clientlibs/avast/clientlibs/generated/templates/t-base-defer.min.9c155646c5bf18f3bdedbf2e0eb76bfe.js | 185ms | 101ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PZ48F8 | 178ms | 146ms | 29ms | 3rd |
| https://www.nortonlifelock.com/content/dam/norton-adobe-analytics/prod/s_code_norton_min.js | 115ms | 90ms | 9ms | 3rd |
| https://nexus.ensighten.com/symantec/avast_web/code/d365fa9f22fe3b573621979a0464d212.js?conditionId0=423130 | 105ms | 66ms | 38ms | 3rd |
| https://www.avast.com/etc.clientlibs/avast/clientlibs/generated/components/sticky-bar.min.e639bf7c06b49926d4d69a3117a48548.js | 54ms | 7ms | 0ms | 3rd |
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction31 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Performance issues directly impact user engagement and conversion rates.
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
Set explicit width and height to prevent CLS.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
CJS BundlesAction25 scripts, 198 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-WPC6R3K&l=sdl | 186 KB | 72 KB (39%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-PZ48F8 | 134 KB | 63 KB (47%) | ✓ | 3rd |
| https://nexus.ensighten.com/symantec/avast_web/Bootstrap.js | 89 KB | 38 KB (42%) | ✓ | 3rd |
| https://assets.adobedtm.com/b29989a14bed/ccef52b414db/launch-773db4767ac4.min.js | 65 KB | 25 KB (39%) | ✓ | 3rd |
| https://www.avast.com/etc.clientlibs/avast/clientlibs/generated/components/hero.min.d9f6d12847cb37e6f6ec87e4f789dd59.js | 1 KB | — | ✓ | 3rd |
| https://www.avast.com/etc.clientlibs/avast/clientlibs/generated/components/articlelist.min.d160d377bd3f107f29854bd111019015.js | 15 KB | — | ✓ | 3rd |
| https://www.avast.com/etc.clientlibs/avast/clientlibs/generated/components/countryselector.min.f63b22ba8c2f79f50099e64aff4a94f1.js | 2 KB | — | ✓ | 3rd |
| https://www.avast.com/etc.clientlibs/avast/clientlibs/generated/components/topnav.min.47fea752ea5375c22085bc45b6dc0d5a.js | 6 KB | — | ✓ | 3rd |
| https://www.avast.com/etc.clientlibs/avast/clientlibs/generated/components/text.min.45c8c645da66c47c54f9dbe32451a6ab.js | 1 KB | — | ✓ | 3rd |
| https://www.avast.com/etc.clientlibs/avast/clientlibs/generated/components/tooltip.min.93d2370187204473a3c13a57db879460.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
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
APage Weight Budget989 KB transferred, 91 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+Font Loading3 fonts (90 KB)PASS
Web fonts
3
90 KB total
Render-blocking
0
of 3
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 Hints27 hints, 0 missing preconnectsPASS
Current Resource Hints
27 resource hints configured
APage Weight Inventory91 resources · 989 KB · 198 KB savings availablePASS
~198.0 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 91 resources | 989.3 KiB | ||||||
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall91 requests over 3058msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
nexus.ensighten.com nexus.ensighten.com | Other | 1918ms | 89 KB | 42% | €31/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 1470ms | 186 KB | 39% | €24/mo | Costly |
www.avast.com www.avast.com | Other | 690ms | 73 KB | — | €11/mo | Costly |
Unattributable Unattributable | Other | 643ms | 0 KB | — | €10/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 398ms | 65 KB | 39% | €6/mo | Costly |
www.avast.com www.avast.com | Other | 185ms | 9 KB | — | €3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 178ms | 134 KB | 47% | €3/mo | Optional |
www.nortonlifelock.com www.nortonlifelock.com | Other | 115ms | 27 KB | — | €2/mo | Optional |
nexus.ensighten.com nexus.ensighten.com | Other | 105ms | 50 KB | — | €2/mo | Optional |
www.avast.com www.avast.com | Other | 54ms | 1 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- nexus.ensighten.com adds 1918ms and costs ~€31/month
- Google Tag Manager adds 1470ms and costs ~€24/month
- www.avast.com adds 690ms and costs ~€11/month
- Unattributable adds 643ms and costs ~€10/month
- assets.adobedtm.com adds 398ms and costs ~€6/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
nexus.ensighten.com takes 1918ms 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
Google Tag Manager takes 1470ms 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
www.avast.com takes 690ms 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 643ms 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
assets.adobedtm.com takes 398ms 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