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.
3.63 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.49 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.33 s
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.
3.63 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.
11.64 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction3520ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-KH8FLJ9>m=4e64k0 | 851ms | 810ms | 39ms | 3rd |
| https://www.winzip.com/en/ | 688ms | 501ms | 4ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-565KQNW | 501ms | 391ms | 59ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-73J027E48R&cx=c>m=4e64k0 | 347ms | 296ms | 47ms | 3rd |
| Unattributable | 254ms | 7ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KJJ3BWB | 231ms | 191ms | 37ms | 3rd |
| https://cdn.optimizely.com/js/26811070246.js | 192ms | 164ms | 23ms | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-996698607&cx=c>m=4e64k0 | 164ms | 132ms | 31ms | 3rd |
| https://www.winzip.com/static/common/scripts/jquery-3.6.0.min.js | 112ms | 87ms | 7ms | 3rd |
| https://www.winzip.com/static/common/scripts/dynamic-pricing/dynamic-pricing-promotions.min.js | 98ms | 68ms | 22ms | 3rd |
Showing top 10 of 11 scripts
DJS BundlesAction23 scripts, 449 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtm.js?id=GTM-KJJ3BWB | 156 KB | 71 KB (46%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N6XH4DXQ>m=4e64k0 | 111 KB | 71 KB (64%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-996698607&cx=c>m=4e64k0 | 146 KB | 71 KB (49%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-73J027E48R&cx=c>m=4e64k0 | 170 KB | 68 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KH8FLJ9>m=4e64k0 | 140 KB | 67 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-565KQNW | 210 KB | 55 KB (26%) | ✓ | 3rd |
| https://cdn.optimizely.com/js/26811070246.js | 94 KB | 47 KB (50%) | ✓ | 3rd |
| https://www.winzip.com/static/common/scripts/jquery.lazyloadxt.extra.min.js | 2 KB | — | ✓ | 3rd |
| https://www.winzip.com/static/wz/scripts/downloadtrial.js | 2 KB | — | ✓ | 3rd |
| https://www.winzip.com/static/wz/scripts/x-target.js | 1 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
FPage Weight InventoryAction61 resources · 1.5 MB · 449 KB savings availableFIX
~449.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 61 resources | 1.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CPage Weight BudgetAction1.5 MB transferred, 61 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 Optimization16 images, 0 KB saveableREVIEW
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 Loading3 fonts (65 KB)PASS
Web fonts
3
65 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 Hints6 hints, 0 missing preconnectsPASS
Current Resource Hints
6 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall61 requests over 1982msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 851ms | 140 KB | 48% | €15/mo | Costly |
www.winzip.com www.winzip.com | Other | 688ms | 15 KB | — | €12/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 501ms | 210 KB | 26% | €9/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 347ms | 170 KB | 40% | €6/mo | Costly |
Unattributable Unattributable | Other | 254ms | 0 KB | — | €4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 231ms | 156 KB | 46% | €4/mo | Costly |
Optimizely cdn.optimizely.com | A/B Testing | 192ms | 94 KB | 50% | €3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 164ms | 146 KB | 49% | €3/mo | Optional |
www.winzip.com www.winzip.com | Other | 112ms | 31 KB | — | €2/mo | Optional |
www.winzip.com www.winzip.com | Other | 98ms | 11 KB | — | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 83ms | 111 KB | 64% | €1/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 851ms and costs ~€15/month
- www.winzip.com adds 688ms and costs ~€12/month
- Google Tag Manager adds 501ms and costs ~€9/month
- Google Tag Manager adds 347ms and costs ~€6/month
- Unattributable adds 254ms and costs ~€4/month
- Google Tag Manager adds 231ms and costs ~€4/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
Google Tag Manager takes 851ms 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.winzip.com takes 688ms 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 501ms 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 347ms 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 254ms 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 231ms 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 Optimizely'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
64% 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