Performance
· 22 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.
1.57 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.22 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
660 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.021
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.60 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.
3.25 s
Page Load Progression
FPage Weight BudgetAction2.8 MB transferred, 50 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS BundlesAction16 scripts, 1.2 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/init.js | 521 KB | 385 KB (74%) | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/9544.js | 858 KB | 378 KB (45%) | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/element-web-app.js | 284 KB | 257 KB (91%) | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/3796.js | 98 KB | 80 KB (82%) | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/3264.js | 107 KB | 64 KB (64%) | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/8996.js | 58 KB | 44 KB (77%) | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/8996.js | 0 KB | 44 KB (77%) | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/1291.js | 6 KB | — | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/bundle.js | 10 KB | — | ✓ | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/9724.js | 5 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 InventoryAction50 resources · 2.8 MB · 1.2 MB savings availableFIX
~1.2 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 50 resources | 2.8 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BImage Optimization11 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
CJS Execution CostAction1595ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/9544.js | 477ms | 326ms | 145ms | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/element-web-app.js | 467ms | 407ms | 59ms | 3rd |
| https://element.atl30309.com/ | 273ms | 4ms | 0ms | 3rd |
| Unattributable | 239ms | 59ms | 0ms | 3rd |
| https://element.atl30309.com/bundles/a87b303cdb1da5ea6d71/init.js | 140ms | 29ms | 103ms | 3rd |
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (47 KB)PASS
Web fonts
2
47 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 HintsNo optimization neededPASS
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Hetzner Online GmbH
Network Waterfall50 requests over 2291msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
element.atl30309.com element.atl30309.com | Other | 477ms | 858 KB | 45% | €5/mo | Costly |
element.atl30309.com element.atl30309.com | Other | 467ms | 284 KB | 91% | €5/mo | Costly |
element.atl30309.com element.atl30309.com | Other | 273ms | 2 KB | — | €3/mo | Costly |
Unattributable Unattributable | Other | 239ms | 0 KB | — | €3/mo | Costly |
element.atl30309.com element.atl30309.com | Other | 140ms | 521 KB | 74% | €2/mo | Optional |
These scripts may cost more than they're worth
- element.atl30309.com adds 477ms and costs ~€5/month
- element.atl30309.com adds 467ms and costs ~€5/month
- element.atl30309.com adds 273ms and costs ~€3/month
- Unattributable adds 239ms 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
element.atl30309.com takes 477ms 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
element.atl30309.com takes 467ms 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
91% of element.atl30309.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
element.atl30309.com takes 273ms 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 239ms 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
74% of element.atl30309.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
Image Optimization6 images, 3 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
6
Total Size
3 KB