https://wan3video.art
Performance
· 22 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
92
GRADE
A
FIX
3
REVIEW
5
PASS
11
INFO
3
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
82
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.
1.29 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.60 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1 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.
1.29 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.
2.62 s
Page Load Progression
481 ms
961 ms
1.4 s 1.9 s
2.4 s 2.9 s
3.4 s
3.8 sChecks
2211 PASS 5 REVIEW 3 FIX
FPage Weight BudgetAction13.2 MB transferred, 103 requestsFIX
Page Weight Budget
Action13.2 MB transferred, 103 requests
13.2 MB transferred, 103 requests
Critical::
Page weighs 14.4 MB (13.2 MB transferred)
Warning::
103 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 2.8 g CO2 per page load
13.2 MB transferred
103 requests
2.8 g CO2 per page load
Other 12.0 MiB 91%
Images 629.7 KiB 5%
JavaScript 467.7 KiB 3%
HTML 41.5 KiB 0%
CSS 33.4 KiB 0%
Other 31.3 KiB 0%
Other 5.6 KiB 0%
Other 1.1 KiB 0%
Other 942 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction97% third-party, 0 ms blockingFIX
Third-Party Impact
Action97% third-party, 0 ms blocking
97% third-party, 0 ms blocking
Warning::
Third-party code accounts for 97% of page weight (12.8 MiB of 13.2 MiB)
Info::
Third-party blocking time is low (0 ms)
97%
First-party Third-party
DPage Weight InventoryAction103 resources · 13.2 MB · 71 KB savings availableFIX
Page Weight Inventory
Action103 resources · 13.2 MB · 71 KB savings available
103 resources · 13.2 MB · 71 KB savings available
Warning::
Page weight 13.2 MB exceeds 1 MB target by 12.2 MB
Got: 13.2 MB Expected: ≤ 1 MB
Info::
~71 KB of savings available
Warning::
26 third-party resources (97% of weight)
Info::
1 resources over 200KB
103 resources · 13.2 MiB · 26 third-party 12.2 MiB over 1MB target
Media 91% · 12.0 MiB
Image 5% · 661.0 KiB
JavaScript 3% · 467.7 KiB
Document 0% · 41.5 KiB
CSS 0% · 33.4 KiB
Other 0% · 7.6 KiB
~70.6 KiB of savings available
Remove unused JavaScript: 70.6 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 103 resources | 13.2 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 630 KB
0 oversized -0 KB
9 legacy format
0 missing dimensions CLS risk
BJS Execution Cost888ms total JS executionREVIEW
JS Execution Cost
888ms total JS execution
888ms total JS execution
Warning::
https://wan3video.art/: 348ms CPU time
Warning::
https://wan3video.art/assets/framework-DJH1pfSr.js: 258ms CPU time
Info::
Unattributable: 145ms CPU time
Info::
https://scripts.clarity.ms/0.8.69/clarity.js: 82ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-Z2G8...: 55ms CPU time
Info::
Third-party scripts: 136ms (15% of total)
Main Thread Breakdown
Script Evaluation 39% Other 33% Style & Layout 15% Rendering 8%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://wan3video.art/ | 348ms | 9ms | 14ms | 1st |
| https://wan3video.art/assets/framework-DJH1pfSr.js | 258ms | 204ms | 0ms | 1st |
| Unattributable | 145ms | 9ms | 0ms | 1st |
| https://scripts.clarity.ms/0.8.69/clarity.js | 82ms | 74ms | 2ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-Z2G8NPHBBP | 55ms | 45ms | 9ms | 3rd |
BJS Bundles72 scripts, 71 KB unusedREVIEW
JS Bundles
72 scripts, 71 KB unused
72 scripts, 71 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Z2G8...: 71 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 71 KB
71 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=G-Z2G8NPHBBP | 166 KB | 71 KB (42%) | ✓ | 3rd |
| 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-D3bmAt5F.js | 1 KB | — | ✓ | 1st |
| https://wan3video.art/assets/navigation-Byp9-lQc.js | 2 KB | — | ✓ | 1st |
| https://wan3video.art/assets/react-DlbkFqaW.js | 14 KB | — | ✓ | 1st |
| https://wan3video.art/assets/BaseLink-DUD_n6-y.js | 6 KB | — | ✓ | 1st |
| https://wan3video.art/assets/locale-B0WQmzKF.js | 3 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
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, max-age=0, s-maxage=60, must-revalidateREVIEW
HTTP Caching
public, max-age=0, s-maxage=60, must-revalidate
public, max-age=0, s-maxage=60, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, s-maxage=60, must-revalidate
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, max-age=0, s-maxage=60, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 0 | Cache for 0 seconds |
| s-maxage | 60 | CDN caches for 1 minute |
| must-revalidate | — | Must recheck with server after expiry |
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 LoadingNo web fonts (system fonts)PASS
Font Loading
No web fonts (system fonts)
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
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+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, s-maxage=60, must-revalidate
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 Waterfall103 requests over 3425msINFO
Network Waterfall
103 requests over 3425ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
15% of JavaScript execution is third-party
First-party Third-party 136ms · 192KB · €1/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Microsoft Clarity scripts.clarity.ms | Session Replay | 82ms | 25 KB | — | €0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 55ms | 166 KB | 42% | €0/mo | Optional |
Microsoft Clarity
Session Replay
Execution 82ms
Transfer 25 KB
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Execution 55ms
Transfer 166 KB
Unused 42%
Monthly Cost €0/mo
Image Optimization28 images, 28 KB total, 0 KB wastedINFO
Image Optimization
28 images, 28 KB total, 0 KB wasted
Image Optimization Audit
Total Images
28
Total Size
28 KB
Oversized
2
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.