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.
1.20 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.90 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
596 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.004
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.99 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.
3.05 s
Page Load Progression
DJS Execution CostAction2460ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://fantasticforms.com/static/js/main.fae5d99a.js | 1555ms | 915ms | 479ms | 1st |
| https://fantasticforms.com/ | 347ms | 18ms | 1ms | 1st |
| Unattributable | 274ms | 8ms | 0ms | 1st |
| https://fantasticforms.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 201ms | 188ms | 4ms | 1st |
| https://cdn.tailwindcss.com/ | 83ms | 61ms | 21ms | 3rd |
FJS BundlesAction12 scripts, 1.3 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://fantasticforms.com/static/js/main.fae5d99a.js | 879 KB | 659 KB (75%) | ✓ | 1st |
| https://fantasticforms.com/static/js/main.fae5d99a.js | 0 KB | 659 KB (75%) | ✓ | 1st |
| https://assets.emergent.sh/scripts/emergent-main.js | 6 KB | — | ✗ | 3rd |
| https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447 | 11 KB | — | ✓ | 3rd |
| https://fantasticforms.com/cdn-cgi/challenge-platform/h/g/scripts/jsd/8fc8ed1d8752/main.js? | 10 KB | — | ✓ | 1st |
| https://assets.endorsely.com/endorsely.js | 0 KB | — | ✓ | 3rd |
| https://assets.emergent.sh/scripts/emergent-main.js | 0 KB | — | ✗ | 3rd |
| https://assets.emergent.sh/scripts/debug-monitor.js | 14 KB | — | ✗ | 3rd |
| https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447 | 0 KB | — | ✓ | 3rd |
| https://fantasticforms.com/cdn-cgi/challenge-platform/h/g/scripts/jsd/8fc8ed1d8752/main.js? | 0 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
BPage Weight Budget1.1 MB transferred, 59 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
CImage OptimizationAction16 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BCompression AlgorithmMain response uses gzip; brotli would be ~20% smallerREVIEW
CPage Weight InventoryAction59 resources · 1.1 MB · 1.3 MB savings availableREVIEW
~1.3 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 59 resources | 1.1 MiB | ||||||
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
AThird-Party Impact20% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (63 KB)PASS
Web fonts
6
63 KB total
Render-blocking
0
of 6
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+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML max-age=300 (≤ 5min) is appropriatePASS
A+Server-Timing Observability3 Server-Timing entries advertisedPASS
AServer Response Intelligence2 server-response signal(s) detectedPASS
AHTTP Cachingmax-age=300 (5 minutes)PASS
public, max-age=300
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 300 | Cache for 5 minutes |
Network Waterfall59 requests over 4287msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
cdn.tailwindcss.com cdn.tailwindcss.com | Other | 83ms | 0 KB | — | €1/mo | Optional |
Image Optimization32 images, 11 KB total, 5 KB wastedINFO
Image Optimization Audit
Total Images
32
Total Size
11 KB
Oversized
1
Wasted
5 KB