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.
2.11 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
4.00 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
216 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.
2.11 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.
8.09 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 sFPage Weight BudgetAction3.0 MB transferred, 250 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
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
DJS Execution CostAction3004ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.uptodown.com/ | 1090ms | 116ms | 2ms | 3rd |
| Unattributable | 1081ms | 10ms | 0ms | 3rd |
| https://geo.cookie-script.com/s/a52be48a31f50475bd697e1db8507f9d.js?country=no-is-li-gb-ch-br&state=ca®ion=eu | 462ms | 300ms | 16ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-DW5XRK7GYT | 220ms | 186ms | 33ms | 3rd |
| https://cdn.cookie-script.com/iabtcf/2.3/sdk_cmp.js | 99ms | 88ms | 6ms | 3rd |
| https://stc.utdstc.com/1776771086959/home.js | 52ms | 35ms | 6ms | 3rd |
DPage Weight InventoryAction250 resources · 3.0 MB · 197 KB savings availableFIX
~196.6 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 250 resources | 3.0 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization226 images, 0 KB saveableREVIEW
CJS BundlesAction7 scripts, 197 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://accounts.google.com/gsi/client | 96 KB | 80 KB (83%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-DW5XRK7GYT | 160 KB | 62 KB (39%) | ✓ | 3rd |
| https://stc.utdstc.com/1776771086959/home.js | 77 KB | 55 KB (80%) | ✓ | 3rd |
| https://geo.cookie-script.com/s/a52be48a31f50475bd697e1db8507f9d.js?country=no-is-li-gb-ch-br&state=ca®ion=eu | 44 KB | — | ✓ | 3rd |
| https://ssm.codes/smart-tag/uptodown-ng.js | 79 KB | — | ✓ | 3rd |
| https://stc.utdstc.com/1776771086959/vendor.js | 24 KB | — | ✓ | 3rd |
| https://cdn.cookie-script.com/iabtcf/2.3/sdk_cmp.js | 26 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
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (34 KB)PASS
Web fonts
2
34 KB total
Render-blocking
0
of 2
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 Hints5 hints, 0 missing preconnectsPASS
Current Resource Hints
5 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: OVHcloud
Network Waterfall250 requests over 1092msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.uptodown.com www.uptodown.com | Other | 1090ms | 46 KB | — | €13/mo | Costly |
Unattributable Unattributable | Other | 1081ms | 0 KB | — | €13/mo | Costly |
geo.cookie-script.com geo.cookie-script.com | Other | 462ms | 44 KB | — | €6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 220ms | 160 KB | 39% | €3/mo | Costly |
Cookie Script cdn.cookie-script.com | Consent | 99ms | 26 KB | — | €1/mo | Essential |
stc.utdstc.com stc.utdstc.com | Other | 52ms | 77 KB | 80% | €1/mo | Optional |
These scripts may cost more than they're worth
- www.uptodown.com adds 1090ms and costs ~€13/month
- Unattributable adds 1081ms and costs ~€13/month
- geo.cookie-script.com adds 462ms and costs ~€6/month
- Google Tag Manager adds 220ms and costs ~€3/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.uptodown.com takes 1090ms 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 1081ms 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
geo.cookie-script.com takes 462ms 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 220ms 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
80% of stc.utdstc.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