https://wan3video.art
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
90
GRADE
A
FIX
3
REVIEW
5
PASS
11
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
72
96
100
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
2.16 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.94 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.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.16 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.
2.94 s
Page Load Progression
571 ms
1.1 s
1.7 s
2.3 s
2.9 s
3.4 s
4.0 s
4.6 sChecks
2111 PASS 5 REVIEW 3 FIX
FPage Weight BudgetAction13.0 MB transferred, 94 requestsFIX
Page Weight Budget
Action13.0 MB transferred, 94 requests
13.0 MB transferred, 94 requests
Critical::
Page weighs 13.6 MB (13.0 MB transferred)
Info::
94 HTTP requests
Info::
Estimated 2.7 g CO2 per page load
13.0 MB transferred
94 requests
2.7 g CO2 per page load
Other 11.9 MiB 91%
Images 694.2 KiB 5%
JavaScript 269.6 KiB 2%
Fonts 107.3 KiB 1%
HTML 49.3 KiB 0%
Other 46.0 KiB 0%
CSS 33.0 KiB 0%
Other 5.0 KiB 0%
Other 928 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget
DThird-Party ImpactAction96% third-party, 0 ms blockingFIX
Third-Party Impact
Action96% third-party, 0 ms blocking
96% third-party, 0 ms blocking
Warning::
Third-party code accounts for 96% of page weight (12.5 MiB of 13.0 MiB)
Info::
Third-party blocking time is low (0 ms)
96%
First-party Third-party
DPage Weight InventoryAction94 resources · 13.0 MB · 0 KB savings availableFIX
Page Weight Inventory
Action94 resources · 13.0 MB · 0 KB savings available
94 resources · 13.0 MB · 0 KB savings available
Warning::
Page weight 13.0 MB exceeds 1 MB target by 12.0 MB
Got: 13.0 MB Expected: ≤ 1 MB
Warning::
18 third-party resources (96% of weight)
Info::
1 resources over 200KB
94 resources · 13.0 MiB · 18 third-party 12.0 MiB over 1MB target
Media 91% · 11.9 MiB
Image 6% · 740.2 KiB
JavaScript 2% · 269.6 KiB
Font 1% · 107.3 KiB
Document 0% · 49.3 KiB
CSS 0% · 33.0 KiB
Other 0% · 5.9 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 94 resources | 13.0 MiB | ||||||
BImage Optimization11 images, 0 KB saveableREVIEW
Image Optimization
11 images, 0 KB saveable
11 images, 0 KB saveable
Info::
All images are well-optimized
11 images 694 KB
0 oversized -0 KB
10 legacy format
0 missing dimensions CLS risk
BJS Execution Cost745ms total JS executionREVIEW
JS Execution Cost
745ms total JS execution
745ms total JS execution
Warning::
https://wan3video.art/: 339ms CPU time
Info::
https://wan3video.art/assets/framework-DJH1pfSr.js: 215ms CPU time
Info::
Unattributable: 191ms CPU time
Main Thread Breakdown
Other 41% Style & Layout 26% Script Evaluation 25% Rendering 5%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://wan3video.art/ | 339ms | 5ms | 6ms | 1st |
| https://wan3video.art/assets/framework-DJH1pfSr.js | 215ms | 175ms | 0ms | 1st |
| Unattributable | 191ms | 12ms | 0ms | 1st |
BMain HTML Cache-ControlCache-Control present but without max-ageREVIEW
Main HTML Cache-Control
Cache-Control present but without max-age
Cache-Control present but without max-age
Info::
Main HTML Cache-Control has no max-age: public, s-maxage=60, stale-while-revalidate=300
Got: public, s-maxage=60, stale-while-revalidate=300
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
BHTTP Cachingpublic, s-maxage=60, stale-while-revalidate=300REVIEW
HTTP Caching
public, s-maxage=60, stale-while-revalidate=300
public, s-maxage=60, stale-while-revalidate=300
Info::
Cache-Control header is set
Got: public, s-maxage=60, stale-while-revalidate=300
Info::
CDN TTL: 1 minute (s-maxage=60)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
public, s-maxage=60, stale-while-revalidate=300
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| s-maxage | 60 | CDN caches for 1 minute |
| stale-while-revalidate | 300 | Serve stale for 5 minutes while fetching fresh |
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Font Loading5 fonts (107 KB)PASS
Font Loading
5 fonts (107 KB)
5 fonts (107 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
107 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
syne-bd7099ad.woff2 woff2 swap
Size 11 KB
Load time 144 ms
Start 794 ms
Risk FOUT — text flashes from fallback to web font
syne-f2eba987.woff2 woff2 swap
Size 15 KB
Load time 179 ms
Start 795 ms
Risk FOUT — text flashes from fallback to web font
syne-c37e2fa5.woff2 woff2 swap
Size 34 KB
Load time 188 ms
Start 795 ms
Risk FOUT — text flashes from fallback to web font
outfit-f37fa50e.woff2 woff2 swap
Size 15 KB
Load time 182 ms
Start 795 ms
Risk FOUT — text flashes from fallback to web font
outfit-c8e7a734.woff2 woff2 swap
Size 32 KB
Load time 188 ms
Start 796 ms
Risk FOUT — text flashes from fallback to web font
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+JS Bundles63 scripts, 0 KB unusedPASS
JS Bundles
63 scripts, 0 KB unused
63 scripts, 0 KB unused
0 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://wan3video.art/assets/global-error-CVl8f3Cz.js | 1 KB | — | ✓ | 1st |
| https://wan3video.art/assets/framework-DJH1pfSr.js | 60 KB | — | ✓ | 1st |
| https://wan3video.art/assets/rolldown-runtime-QTnfLwEv.js | 1 KB | — | ✓ | 1st |
| https://wan3video.art/assets/url-utils-BQKFb685.js | 1 KB | — | ✓ | 1st |
| https://wan3video.art/assets/error-CPFCe8aP.js | 1 KB | — | ✓ | 1st |
| https://wan3video.art/assets/navigation-B4BfoQf8.js | 2 KB | — | ✓ | 1st |
| https://wan3video.art/assets/react-DlbkFqaW.js | 13 KB | — | ✓ | 1st |
| https://wan3video.art/assets/BaseLink-C8FbMEvF.js | 6 KB | — | ✓ | 1st |
| https://wan3video.art/assets/locale-Bhv3KJcg.js | 3 KB | — | ✓ | 1st |
| https://wan3video.art/assets/react-client-CAjdHkmk.js | 1 KB | — | ✓ | 1st |
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+Compression AlgorithmMain response uses brotliPASS
Compression Algorithm
Main response uses brotli
Main response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: RSC, Accept, Next-Router-State-Tree, Next-Router-Prefetch, Next-Router-Segment-P...
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
No `ETag` or `Last-Modified` -- conditional GET not supported
Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall94 requests over 2261msINFO
Network Waterfall
94 requests over 2261ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization22 images, 4 KB total, 0 KB wastedINFO
Image Optimization
22 images, 4 KB total, 0 KB wasted
Image Optimization Audit
Total Images
22
Total Size
4 KB
Oversized
2
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.