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.
900 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.56 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.24 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.123
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.30 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.
6.49 s
Page Load Progression
511 ms
1.0 s
1.5 s 2.0 s 2.6 s
3.1 s
3.6 s
4.1 sFPage Weight BudgetAction3.4 MB transferred, 197 requestsFIX
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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4058ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.parallels.com/static/common/scripts/email-form/formio.full.min.js | 1168ms | 947ms | 52ms | 3rd |
| https://www.parallels.com/ | 759ms | 306ms | 2ms | 3rd |
| https://cdn.optimizely.com/js/26796560052.js | 383ms | 353ms | 12ms | 3rd |
| Unattributable | 323ms | 10ms | 0ms | 3rd |
| https://www.parallels.com/static/common/scripts/jquery-3.6.0.min.js | 207ms | 197ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-565KQNW | 199ms | 160ms | 21ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KH8FLJ9>m=4e64h1 | 181ms | 169ms | 11ms | 3rd |
| https://scripts.clarity.ms/0.8.59/clarity.js | 132ms | 118ms | 2ms | 3rd |
| https://www.parallels.com/static/pl/typo3conf/ext/parallels_geoip/country/country.js | 123ms | 123ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-36CP | 103ms | 86ms | 16ms | 3rd |
Showing top 10 of 17 scripts
FJS BundlesAction88 scripts, 779 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.parallels.com/static/common/scripts/email-form/formio.full.min.js | 424 KB | 245 KB (58%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-36CP | 161 KB | 67 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KH8FLJ9>m=4e64h1 | 141 KB | 67 KB (47%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-CEVYC7924W&cx=c>m=4e64h1 | 173 KB | 64 KB (37%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/destination?id=AW-1067174464&cx=c>m=4e64h1 | 145 KB | 60 KB (42%) | ✓ | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwMQ.js | 110 KB | 56 KB (52%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202402.1.0/otBannerSdk.js | 105 KB | 53 KB (50%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-565KQNW | 210 KB | 52 KB (25%) | ✓ | 3rd |
| https://cdn.optimizely.com/js/26796560052.js | 92 KB | 47 KB (52%) | ✓ | 3rd |
| https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js | 57 KB | 36 KB (65%) | ✓ | 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 InventoryAction197 resources · 3.4 MB · 779 KB savings availableFIX
~778.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 197 resources | 3.4 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization32 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 Loading7 fonts (143 KB)PASS
Web fonts
7
143 KB total
Render-blocking
0
of 7
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 Waterfall197 requests over 4882msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.parallels.com www.parallels.com | Other | 1168ms | 424 KB | 58% | €20/mo | Costly |
www.parallels.com www.parallels.com | Other | 759ms | 22 KB | — | €13/mo | Costly |
Optimizely cdn.optimizely.com | A/B Testing | 383ms | 92 KB | 52% | €7/mo | Costly |
Unattributable Unattributable | Other | 323ms | 0 KB | — | €6/mo | Costly |
www.parallels.com www.parallels.com | Other | 207ms | 31 KB | — | €4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 199ms | 210 KB | 25% | €3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 181ms | 141 KB | 47% | €3/mo | Optional |
Microsoft Clarity scripts.clarity.ms | Session Replay | 132ms | 26 KB | — | €2/mo | Optional |
www.parallels.com www.parallels.com | Other | 123ms | 0 KB | — | €2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 103ms | 161 KB | 42% | €2/mo | Optional |
analytics.tiktok.com analytics.tiktok.com | Other | 101ms | 110 KB | 52% | €2/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 79ms | 105 KB | 50% | €1/mo | Essential |
Google Tag Manager www.googletagmanager.com | Tag Manager | 71ms | 173 KB | 37% | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 71ms | 46 KB | — | €1/mo | Optional |
Hotjar script.hotjar.com | Session Replay | 54ms | 57 KB | 65% | €1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 52ms | 97 KB | 32% | €1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 51ms | 145 KB | 42% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.parallels.com adds 1168ms and costs ~€20/month
- www.parallels.com adds 759ms and costs ~€13/month
- Optimizely adds 383ms and costs ~€7/month
- Unattributable adds 323ms and costs ~€6/month
- www.parallels.com adds 207ms 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
www.parallels.com takes 1168ms 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
58% of www.parallels.com'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
www.parallels.com takes 759ms 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
Optimizely takes 383ms 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
52% 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
Unattributable takes 323ms 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.parallels.com takes 207ms 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
52% of analytics.tiktok.com'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
50% of OneTrust'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
65% of Hotjar'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