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.
535 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.09 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.006
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
924 ms
Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.
1.12 s
Page Load Progression
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.2 MB transferred, 77 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 Optimization22 images, 0 KB saveableREVIEW
BJS Execution Cost744ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.climeup.ai/_next/static/chunks/684-f776693e7bb17703.js | 214ms | 197ms | 3ms | 1st |
| https://www.climeup.ai/en | 186ms | 5ms | 3ms | 1st |
| Unattributable | 159ms | 6ms | 0ms | 1st |
| https://js-na2.hs-analytics.net/analytics/1782888300000/245100027.js | 134ms | 99ms | 2ms | 3rd |
| https://www.climeup.ai/_next/static/chunks/157-d6edf7e5a065c80f.js | 51ms | 47ms | 4ms | 1st |
CJS BundlesAction30 scripts, 177 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.climeup.ai/_next/static/chunks/159-9d372c87baf92a59.js | 100 KB | 78 KB (79%) | ✓ | 1st |
| https://www.climeup.ai/_next/static/chunks/702.9027cd97cf58af36.js | 69 KB | 54 KB (79%) | ✓ | 1st |
| https://www.climeup.ai/_next/static/chunks/157-d6edf7e5a065c80f.js | 64 KB | 24 KB (37%) | ✓ | 1st |
| https://www.climeup.ai/_next/static/chunks/609-58e5394563876376.js | 38 KB | 20 KB (55%) | ✓ | 1st |
| https://www.climeup.ai/_next/static/chunks/app/%5Blang%5D/page-cd59a9bbe80fbc41.js | 12 KB | — | ✓ | 1st |
| https://js-na2.hs-banner.com/v2/245100027/banner.js | 24 KB | — | ✓ | 3rd |
| https://www.climeup.ai/_next/static/chunks/154-857eb4ba8846583d.js | 2 KB | — | ✓ | 1st |
| https://www.climeup.ai/_next/static/chunks/webpack-9d0b4ce46756d30d.js | 2 KB | — | ✓ | 1st |
| https://www.climeup.ai/_next/static/chunks/344-97cdf743bf82c459.js | 3 KB | — | ✓ | 1st |
| https://www.climeup.ai/_next/static/chunks/407-6125bfafc520b420.js | 20 KB | — | ✓ | 1st |
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
CCompression AlgorithmActionMain response served uncompressedREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
AThird-Party Impact34% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading2 fonts (39 KB)PASS
Web fonts
2
39 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
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)
Fixing the unchecked items could save ~12 KB and ~24 ms
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
APage Weight Inventory77 resources · 1.2 MB · 177 KB savings availablePASS
~177.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 77 resources | 1.2 MiB | ||||||
Network Waterfall77 requests over 2863msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
js-na2.hs-analytics.net js-na2.hs-analytics.net | Other | 134ms | 43 KB | — | €1/mo | Optional |
Image Optimization36 images, 114 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
36
Total Size
114 KB