https://planets-online.com
Performance
· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
95
GRADE
A
FIX
0
REVIEW
2
PASS
17
INFO
2
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
94
90
81
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
858 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.34 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.
1.47 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.
1.34 s
Page Load Progression
375 ms 750 ms 1.1 s
1.5 s
1.9 s 2.2 s 2.6 s 3.0 sChecks
2117 PASS 2 REVIEW
BJS Bundles6 scripts, 61 KB unusedREVIEW
JS Bundles
6 scripts, 61 KB unused
6 scripts, 61 KB unused
Warning::
https://planets-online.com/js/cdn/swiper-bundle.mi...: 35 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://planets-online.com/js/cdn/bootstrap.bundle...: 26 KB unused (84%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 61 KB
61 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://planets-online.com/js/cdn/swiper-bundle.min.js | 56 KB | 35 KB (63%) | ✓ | 1st |
| https://planets-online.com/js/cdn/bootstrap.bundle.min.js | 31 KB | 26 KB (84%) | ✓ | 1st |
| https://static.cloudflareinsights.com/beacon.min.js/v4513226cdae34746b4dedf0b4dfa099e1781791509496 | 11 KB | — | ✓ | 3rd |
| https://planets-online.com/js/swiper.js | 1 KB | — | ✓ | 1st |
| https://planets-online.com/js/base.js | 2 KB | — | ✓ | 1st |
| https://planets-online.com/cdn-cgi/challenge-platform/h/b/scripts/jsd/3104729c556c/main.js? | 10 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
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
BHTTP Cachingno-cacheREVIEW
HTTP Caching
no-cache
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
Last-Modified header present
Cache-Control
no-cache
| Directive | Value | Meaning |
|---|---|---|
| no-cache | — | Cache but always revalidate first |
APage Weight Budget996 KB transferred, 20 requestsPASS
Page Weight Budget
996 KB transferred, 20 requests
996 KB transferred, 20 requests
Info::
Page weighs 1.5 MB (996 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.20 g CO2 per page load
996 KB transferred
20 requests
0.20 g CO2 per page load
Images 691.4 KiB 69%
JavaScript 111.8 KiB 11%
Fonts 111.2 KiB 11%
CSS 54.8 KiB 5%
Other 19.2 KiB 2%
HTML 6.1 KiB 1%
Other 1.5 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+Third-Party Impact14% third-party, 0 ms blockingPASS
Third-Party Impact
14% third-party, 0 ms blocking
14% third-party, 0 ms blocking
Info::
Third-party code accounts for 14% of page weight (139.4 KiB of 995.9 KiB)
Info::
Third-party blocking time is low (0 ms)
86%
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.
AImage Optimization2 images, 0 KB saveablePASS
Image Optimization
2 images, 0 KB saveable
2 images, 0 KB saveable
Warning::
https://planets-online.com/src/base/pol.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
2 images 691 KB
0 oversized -0 KB
2 legacy format
1 missing dimensions CLS risk
Set explicit width and height to prevent CLS.
Why this matters
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
A+JS Execution Cost322ms total JS executionPASS
JS Execution Cost
322ms total JS execution
322ms total JS execution
Info::
https://planets-online.com/: 151ms CPU time
Info::
https://planets-online.com/cdn-cgi/challenge-platf...: 93ms CPU time
Info::
https://planets-online.com/js/cdn/swiper-bundle.mi...: 78ms CPU time
Main Thread Breakdown
Script Evaluation 38% Style & Layout 32% Other 24% Parse HTML & CSS 3%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://planets-online.com/ | 151ms | 9ms | 1ms | 1st |
| https://planets-online.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 93ms | 88ms | 1ms | 1st |
| https://planets-online.com/js/cdn/swiper-bundle.min.js | 78ms | 31ms | 4ms | 1st |
A+Font Loading1 fonts (111 KB)PASS
Font Loading
1 fonts (111 KB)
1 fonts (111 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
1
111 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
Transfer FOIT (block) FOUT (swap)
fa-solid-900.woff2 woff2 swap
Size 111 KB
Load time 99 ms
Start 1.3 s
Risk FOUT — text flashes from fallback to web font
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~56 KB and ~112 ms
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 uses no-cache -- safe revalidate-on-request policyPASS
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
Main HTML uses no-cache -- safe revalidate-on-request policy
Info::
Main HTML uses no-cache -- safe revalidate-on-request policy
Got: no-cache
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: Accept-Encoding
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::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
A+Page Weight Inventory20 resources · 996 KB · 61 KB savings availablePASS
Page Weight Inventory
20 resources · 996 KB · 61 KB savings available
20 resources · 996 KB · 61 KB savings available
Info::
Within 1MB page-weight target
Got: 996 KB
Info::
~61 KB of savings available
Info::
3 third-party resources (14% of weight)
Info::
1 resources over 200KB
20 resources · 995.9 KiB · 3 third-party Within 1MB page-weight target
Image 71% · 709.8 KiB
JavaScript 11% · 111.8 KiB
Font 11% · 111.2 KiB
CSS 5% · 54.8 KiB
Document 1% · 6.1 KiB
Other 0% · 2.3 KiB
~60.7 KiB of savings available
Remove unused JavaScript: 60.7 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 20 resources | 995.9 KiB | ||||||
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 Waterfall20 requests over 1702msINFO
Network Waterfall
20 requests over 1702ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization1 images, 18 KB total, 0 KB wastedINFO
Image Optimization
1 images, 18 KB total, 0 KB wasted
Image Optimization Audit
Total Images
1
Total Size
18 KB
1 missing dimensions
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.