https://kling5.art
Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
95
GRADE
A
FIX
0
REVIEW
5
PASS
14
INFO
4
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
82
96
96
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.60 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.84 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
10 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.
2.20 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.
2.65 s
Page Load Progression
561 ms
1.1 s
1.7 s 2.2 s
2.8 s
3.4 s
3.9 s
4.5 sChecks
2314 PASS 5 REVIEW
BPage Weight Budget1.2 MB transferred, 94 requestsREVIEW
Page Weight Budget
1.2 MB transferred, 94 requests
1.2 MB transferred, 94 requests
Info::
Page weighs 2.3 MB (1.2 MB transferred)
Info::
94 HTTP requests
Info::
Estimated 0.26 g CO2 per page load
1.2 MB transferred
94 requests
0.26 g CO2 per page load
Other 708.5 KiB 56%
JavaScript 389.9 KiB 31%
HTML 48.3 KiB 4%
CSS 32.8 KiB 3%
Images 27.6 KiB 2%
Other 26.9 KiB 2%
Fonts 20.9 KiB 2%
Other 4.9 KiB 0%
Other 1.3 KiB 0%
Other 923 B 0%
Other 881 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
CJS Execution CostAction1175ms total JS executionREVIEW
JS Execution Cost
Action1175ms total JS execution
1175ms total JS execution
Warning::
https://kling5.art/: 496ms CPU time
Warning::
Unattributable: 272ms CPU time
Warning::
https://kling5.art/assets/framework-DJH1pfSr.js: 271ms CPU time
Info::
https://static.cloudflareinsights.com/beacon.min.j...: 77ms CPU time
Info::
https://accounts.google.com/gsi/client: 60ms CPU time
Info::
Third-party scripts: 137ms (12% of total)
Main Thread Breakdown
Other 35% Script Evaluation 32% Style & Layout 24% Script Parsing & Compilation 4% Rendering 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://kling5.art/ | 496ms | 25ms | 19ms | 1st |
| Unattributable | 272ms | 22ms | 0ms | 1st |
| https://kling5.art/assets/framework-DJH1pfSr.js | 271ms | 231ms | 2ms | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/v31edd6df95cf4e85bb4c19e7a9bdbcba1788362987495 | 77ms | 66ms | 0ms | 3rd |
| https://accounts.google.com/gsi/client | 60ms | 35ms | 24ms | 3rd |
BJS Bundles67 scripts, 74 KB unusedREVIEW
JS Bundles
67 scripts, 74 KB unused
67 scripts, 74 KB unused
Warning::
https://accounts.google.com/gsi/client: 74 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 74 KB
74 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://accounts.google.com/gsi/client | 99 KB | 74 KB (75%) | ✓ | 3rd |
| https://kling5.art/assets/global-error-CVl8f3Cz.js | 1 KB | — | ✓ | 1st |
| https://kling5.art/assets/framework-DJH1pfSr.js | 60 KB | — | ✓ | 1st |
| https://kling5.art/assets/rolldown-runtime-QTnfLwEv.js | 1 KB | — | ✓ | 1st |
| https://kling5.art/assets/url-utils-BQKFb685.js | 1 KB | — | ✓ | 1st |
| https://kling5.art/assets/error-CKqcQOr6.js | 1 KB | — | ✓ | 1st |
| https://kling5.art/assets/navigation-NAM0kUEw.js | 2 KB | — | ✓ | 1st |
| https://kling5.art/assets/react-DlbkFqaW.js | 14 KB | — | ✓ | 1st |
| https://kling5.art/assets/BaseLink-BtIEPdS4.js | 6 KB | — | ✓ | 1st |
| https://kling5.art/assets/locale-Ca8Mb35V.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
BPage Weight Inventory94 resources · 1.2 MB · 74 KB savings availableREVIEW
Page Weight Inventory
94 resources · 1.2 MB · 74 KB savings available
94 resources · 1.2 MB · 74 KB savings available
Warning::
Page weight 1.2 MB exceeds 1 MB target by 239 KB
Got: 1.2 MB Expected: ≤ 1 MB
Info::
~74 KB of savings available
Info::
10 third-party resources (9% of weight)
Info::
1 resources over 200KB
94 resources · 1.2 MiB · 10 third-party 239.1 KiB over 1MB target
Media 56% · 708.5 KiB
JavaScript 31% · 389.9 KiB
Image 4% · 54.5 KiB
Document 4% · 48.3 KiB
CSS 3% · 32.8 KiB
Font 2% · 20.9 KiB
Other 1% · 8.0 KiB
~73.9 KiB of savings available
Remove unused JavaScript: 73.9 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 94 resources | 1.2 MiB | ||||||
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+Third-Party Impact9% third-party, 0 ms blockingPASS
Third-Party Impact
9% third-party, 0 ms blocking
9% third-party, 0 ms blocking
Info::
Third-party code accounts for 9% of page weight (115.9 KiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
91%
First-party Third-party
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+Image Optimization3 images, 0 KB saveablePASS
Image Optimization
3 images, 0 KB saveable
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 3 KB
0 oversized -0 KB
1 legacy format
0 missing dimensions CLS risk
A+Font Loading2 fonts (21 KB)PASS
Font Loading
2 fonts (21 KB)
2 fonts (21 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
21 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
outfit-19c86109.woff2 woff2 swap
Size 7 KB
Load time 53 ms
Start 98 ms
Risk FOUT — text flashes from fallback to web font
outfit-be21ba2a.woff2 woff2 swap
Size 14 KB
Load time 64 ms
Start 99 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+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+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
Document 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-Timing Observability3 Server-Timing entries advertisedPASS
Server-Timing Observability
3 Server-Timing entries advertised
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
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
Asset CompressionNo text asset hosts to measureINFO
Asset Compression
No text asset hosts to measure
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall94 requests over 2229msINFO
Network Waterfall
94 requests over 2229ms
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
12% of JavaScript execution is third-party
First-party Third-party 137ms · 109KB · €1/mo
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
static.cloudflareinsights.com static.cloudflareinsights.com | Other | 77ms | 10 KB | — | €0/mo | Optional |
accounts.google.com accounts.google.com | Other | 60ms | 99 KB | 75% | €0/mo | Optional |
static.cloudflareinsights.com
Other
Execution 77ms
Transfer 10 KB
Monthly Cost €0/mo
accounts.google.com
Other
Execution 60ms
Transfer 99 KB
Unused 75%
Monthly Cost €0/mo
75% of accounts.google.com's code is unused. The script may be loading features you don't use.
Why this matters
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Image Optimization4 images, 28 KB total, 0 KB wastedINFO
Image Optimization
4 images, 28 KB total, 0 KB wasted
Image Optimization Audit
Total Images
4
Total Size
28 KB
1 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.