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https://planets-online.com

Performance

· 25 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
4
PASS
19
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
62
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.00 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

7.27 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

252 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.

5.43 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.

7.27 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 s
Checks
25
19 PASS 4 REVIEW
C
JS Execution Cost
Action
1234ms total JS execution
REVIEW
1234ms total JS execution
Warning::
https://planets-online.com/js/swiper.js: 452ms CPU time
Warning::
https://planets-online.com/js/cdn/swiper-bundle.mi...: 275ms CPU time
Info::
https://planets-online.com/cdn-cgi/challenge-platf...: 240ms CPU time
Info::
Unattributable: 207ms CPU time
Info::
https://planets-online.com/: 60ms CPU time

Main Thread Breakdown

Script Evaluation 35% Style & Layout 30% Other 29%
ScriptTotalScriptingParse/CompileParty
https://planets-online.com/js/swiper.js452ms57ms0ms1st
https://planets-online.com/js/cdn/swiper-bundle.min.js275ms105ms15ms1st
https://planets-online.com/cdn-cgi/challenge-platform/scripts/jsd/main.js240ms229ms2ms1st
Unattributable207ms5ms0ms1st
https://planets-online.com/60ms30ms2ms1st
B
JS Bundles
6 scripts, 61 KB unused
REVIEW
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.

ScriptSizeUnusedMinifiedParty
https://planets-online.com/js/cdn/swiper-bundle.min.js56 KB35 KB (63%)✓1st
https://planets-online.com/js/cdn/bootstrap.bundle.min.js31 KB26 KB (84%)✓1st
https://planets-online.com/js/swiper.js1 KB—✓1st
https://planets-online.com/js/base.js2 KB—✓1st
https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a1177817227644711 KB—✓3rd
https://planets-online.com/cdn-cgi/challenge-platform/h/g/scripts/jsd/8fc8ed1d8752/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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
no-cache
REVIEW
no-cache
Info::
Cache-Control header is set
Got: no-cache
Info::
Last-Modified header present
Cache-Control

no-cache

DirectiveValueMeaning
no-cache—Cache but always revalidate first
A
Page Weight Budget
1013 KB transferred, 21 requests
PASS
1013 KB transferred, 21 requests
Info::
Page weighs 1.5 MB (1013 KB transferred)
Info::
21 HTTP requests
Info::
Estimated 0.21 g CO2 per page load
1013 KB / 2.4 MB budget
1013 KB transferred
21 requests
0.21 g CO2 per page load
Images 691.3 KiB 68%
Fonts 111.2 KiB 11%
JavaScript 111.0 KiB 11%
CSS 72.2 KiB 7%
Other 19.2 KiB 2%
HTML 6.1 KiB 1%
Other 1.8 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
14% third-party, 0 ms blocking
PASS
14% third-party, 0 ms blocking
Info::
Third-party code accounts for 14% of page weight (139.5 KiB of 1012.7 KiB)
Info::
Third-party blocking time is low (0 ms)
86%
First-party Third-party
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
3 images, 0 KB saveable
PASS
3 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.
3 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+
Font Loading
1 fonts (111 KB)
PASS
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)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.0 s LCP 7.3 shttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.0/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.0/webfonts/fa-solid-900.woff2 — 111.2 KiB — 84 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 111 KB
Load time 84 ms
Start 890 ms
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 Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
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 Algorithm
Main response uses brotli
PASS
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 Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+
Main HTML Cache-Control
Main HTML uses no-cache -- safe revalidate-on-request policy
PASS
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 Observability
3 Server-Timing entries advertised
PASS
3 Server-Timing entries advertised
Info::
Server-Timing header advertises 3 timing entries
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
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 Inventory
21 resources · 1013 KB · 61 KB savings available
PASS
21 resources · 1013 KB · 61 KB savings available
Info::
Within 1MB page-weight target
Got: 1013 KB
Info::
~61 KB of savings available
Info::
4 third-party resources (14% of weight)
Info::
1 resources over 200KB
21 resources · 1012.7 KiB · 4 third-party Within 1MB page-weight target
Image 70% · 709.8 KiB
Font 11% · 111.2 KiB
JavaScript 11% · 111.0 KiB
CSS 7% · 72.2 KiB
Document 1% · 6.1 KiB
Other 0% · 2.5 KiB

~60.8 KiB of savings available

Remove unused JavaScript: 60.8 KiB
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
1 render-blocking <script src> tag(s) without async/defer
Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
Network Waterfall
21 requests over 1574ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s FCP 3.0 s LCP 7.3 shttps://planets-online.com// https://planets-online.com/ — 200 — 6.1 KiB — 306 ms — h2https://planets-online.com/cdn-cgi/speculation/cdn-cgi/speculation https://planets-online.com/cdn-cgi/speculation — 200 — 476 B — 21 ms — h2https://planets-online.com/css/cdn/swiper-bundle.min.css/css/cdn/swiper-bundle.min.css https://planets-online.com/css/cdn/swiper-bundle.min.css — 200 — 4.0 KiB — 404 ms — h2https://planets-online.com/css/cdn/bootstrap.min.css/css/cdn/bootstrap.min.css https://planets-online.com/css/cdn/bootstrap.min.css — 200 — 47.1 KiB — 412 ms — h2https://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.0/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.0/css/all.min.css — 200 — 16.9 KiB — 109 ms — h3https://planets-online.com/css/base.css/css/base.css https://planets-online.com/css/base.css — 200 — 2.5 KiB — 429 ms — h2https://planets-online.com/css/index.css/css/index.css https://planets-online.com/css/index.css — 200 — 1.7 KiB — 432 ms — h2https://planets-online.com/src/base/pol.png/src/base/pol.png https://planets-online.com/src/base/pol.png — 200 — 9.5 KiB — 424 ms — h2https://planets-online.com/js/cdn/bootstrap.bundle.min.js/js/cdn/bootstrap.bundle.min.js https://planets-online.com/js/cdn/bootstrap.bundle.min.js — 200 — 30.8 KiB — 442 ms — h2https://planets-online.com/js/cdn/swiper-bundle.min.js/js/cdn/swiper-bundle.min.js https://planets-online.com/js/cdn/swiper-bundle.min.js — 200 — 56.0 KiB — 440 ms — h2https://planets-online.com/js/swiper.js/js/swiper.js https://planets-online.com/js/swiper.js — 200 — 862 B — 436 ms — h2https://planets-online.com/js/base.js/js/base.js https://planets-online.com/js/base.js — 200 — 1.8 KiB — 418 ms — h2https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447 — 200 — 11.4 KiB — 101 ms — h2https://planets-online.com/src/base/background.jpg/src/base/background.jpg https://planets-online.com/src/base/background.jpg — 200 — 681.8 KiB — 535 ms — h3data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='…www.w3.org/2000/svg' viewBox='0 0 3... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='… — 200 — 0 B — 0 ms — datahttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.0/webfonts/fa-solid-900.woff2cdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/7.0.0/webfonts/fa-solid-900.woff2 — 200 — 111.2 KiB — 84 ms — h3https://planets-online.com/cdn-cgi/challenge-platform/scripts/jsd/main.js/cdn-cgi/challenge-platform/scripts... https://planets-online.com/cdn-cgi/challenge-platform/scripts/jsd/main.js — 302 — 258 B — 22 ms — h3https://planets-online.com/cdn-cgi/challenge-platform/h/g/scripts/jsd/8fc8ed1d8752/main.js?/cdn-cgi/challenge-platform/h/g/scr... https://planets-online.com/cdn-cgi/challenge-platform/h/g/scripts/jsd/8fc8ed1d8752/main.js? — 200 — 10.2 KiB — 35 ms — h3https://planets-online.com/cdn-cgi/challenge-platform/h/g/jsd/oneshot/8fc8ed1d8752/0.9714354553572848:1780768825:wpLDvFWFl-neCoA7Kta4AQgrmd0eX4aEv-Wom4b6U54/a079831bc9bdd10b/cdn-cgi/challenge-platform/h/g/jsd... https://planets-online.com/cdn-cgi/challenge-platform/h/g/jsd/oneshot/8fc8ed1d8752/0.9714354553572848:1780768825:wpLDvFWFl-neCoA7Kta4AQgrmd0eX4aEv-Wom4b6U54/a079831bc9bdd10b — 200 — 634 B — 28 ms — h3https://planets-online.com/cdn-cgi/rum?/cdn-cgi/rum? https://planets-online.com/cdn-cgi/rum? — 204 — 1.1 KiB — 35 ms — h3https://planets-online.com/favicon.ico/favicon.ico https://planets-online.com/favicon.ico — 200 — 18.5 KiB — 246 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Image Optimization
1 images, 18 KB total, 0 KB wasted
INFO

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.

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