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https://planets-online.com

Performance

· 21 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
95
GRADE
A
FIX
0
REVIEW
3
PASS
16
INFO
2

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

Mobile Desktop
94
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.

945 ms

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

1.45 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.

1.13 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.

1.45 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
21
16 PASS 3 REVIEW
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...: 25 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 KB25 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?11 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
996 KB transferred, 20 requests
PASS
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 / 2.4 MB budget
996 KB transferred
20 requests
0.20 g CO2 per page load
Images 691.4 KiB 69%
JavaScript 112.2 KiB 11%
Fonts 111.2 KiB 11%
CSS 54.8 KiB 5%
Other 19.2 KiB 2%
HTML 6.1 KiB 1%
Other 1.3 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 996.1 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
2 images, 0 KB saveable
PASS
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 Cost
288ms total JS execution
PASS
288ms total JS execution
Info::
https://planets-online.com/: 142ms CPU time
Info::
https://planets-online.com/cdn-cgi/challenge-platf...: 73ms CPU time
Info::
https://planets-online.com/js/cdn/swiper-bundle.mi...: 72ms CPU time

Main Thread Breakdown

Script Evaluation 37% Style & Layout 32% Other 24%
ScriptTotalScriptingParse/CompileParty
https://planets-online.com/142ms11ms1ms1st
https://planets-online.com/cdn-cgi/challenge-platform/scripts/jsd/main.js73ms71ms0ms1st
https://planets-online.com/js/cdn/swiper-bundle.min.js72ms27ms5ms1st
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 500 ms 1.0 s 1.5 s FCP 945 ms LCP 1.5 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 — 85 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 111 KB
Load time 85 ms
Start 759 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
20 resources · 996 KB · 61 KB savings available
PASS
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 · 996.1 KiB · 3 third-party Within 1MB page-weight target
Image 71% · 709.8 KiB
JavaScript 11% · 112.2 KiB
Font 11% · 111.2 KiB
CSS 5% · 54.8 KiB
Document 1% · 6.1 KiB
Other 0% · 2.1 KiB

~60.7 KiB of savings available

Remove unused JavaScript: 60.7 KiB
Network Waterfall
20 requests over 1200ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 945 ms LCP 1.5 shttps://planets-online.com// https://planets-online.com/ — 200 — 6.1 KiB — 319 ms — h3https://planets-online.com/cdn-cgi/speculation/cdn-cgi/speculation https://planets-online.com/cdn-cgi/speculation — 200 — 593 B — 30 ms — h3https://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 — 3.4 KiB — 241 ms — h3https://planets-online.com/css/cdn/bootstrap.min.css/css/cdn/bootstrap.min.css https://planets-online.com/css/cdn/bootstrap.min.css — 200 — 30.6 KiB — 307 ms — h3https://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 — 79 ms — h3https://planets-online.com/css/base.css/css/base.css https://planets-online.com/css/base.css — 200 — 2.2 KiB — 253 ms — h3https://planets-online.com/css/index.css/css/index.css https://planets-online.com/css/index.css — 200 — 1.7 KiB — 264 ms — h3https://planets-online.com/src/base/pol.png/src/base/pol.png https://planets-online.com/src/base/pol.png — 200 — 9.7 KiB — 275 ms — h3https://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 — 31.0 KiB — 303 ms — h3https://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 — 56.2 KiB — 305 ms — h3https://planets-online.com/js/swiper.js/js/swiper.js https://planets-online.com/js/swiper.js — 200 — 1.0 KiB — 240 ms — h3https://planets-online.com/js/base.js/js/base.js https://planets-online.com/js/base.js — 200 — 2.0 KiB — 236 ms — h3https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447static.cloudflareinsights.com/beaco... https://static.cloudflareinsights.com/beacon.min.js/v833ccba57c9e4d2798f2e76cebdd09a11778172276447 — 200 — 11.4 KiB — 67 ms — h2https://planets-online.com/src/base/background.jpg/src/base/background.jpg https://planets-online.com/src/base/background.jpg — 200 — 681.7 KiB — 290 ms — h3https://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 — 85 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 — 222 B — 21 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 — 10.6 KiB — 22 ms — h3https://planets-online.com/cdn-cgi/challenge-platform/h/g/jsd/oneshot/8fc8ed1d8752/0.9714354553572848:1780768825:wpLDvFWFl-neCoA7Kta4AQgrmd0eX4aEv-Wom4b6U54/a0798377d9a5d51a/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/a0798377d9a5d51a — 200 — 844 B — 29 ms — h3https://planets-online.com/cdn-cgi/rum?/cdn-cgi/rum? https://planets-online.com/cdn-cgi/rum? — 204 — 469 B — 33 ms — h3https://planets-online.com/favicon.ico/favicon.ico https://planets-online.com/favicon.ico — 200 — 18.4 KiB — 239 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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