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https://www.planetscale.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
5
PASS
6
INFO
2

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

Mobile Desktop
98
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.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
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.

858 ms

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

911 ms

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.

887 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

916 ms

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
14
6 PASS 5 REVIEW 1 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.3 MiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
B
Page Weight Budget
1.3 MB transferred, 71 requests
REVIEW
1.3 MB transferred, 71 requests
Info::
Page weighs 2.8 MB (1.3 MB transferred)
Info::
71 HTTP requests
Info::
Estimated 0.28 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
71 requests
0.28 g CO2 per page load
Images 597.4 KiB 44%
Other 501.1 KiB 37%
JavaScript 218.4 KiB 16%
HTML 19.9 KiB 1%
CSS 13.8 KiB 1%
Other 2.1 KiB 0%
Other 1.1 KiB 0%
Other 698 B 0%
0 2.4 MB 4.9 MB
Under budget
B
Image Optimization
41 images, 0 KB saveable
REVIEW
41 images, 0 KB saveable
Info::
All images are well-optimized
41 images 597 KB
0 oversized -0 KB
34 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
506ms total JS execution
REVIEW
506ms total JS execution
Info::
Unattributable: 225ms CPU time
Info::
https://planetscale.com/: 207ms CPU time
Info::
https://planetscale.com/assets/index-0GhomdpU.js: 73ms CPU time
Warning::
Third-party scripts: 506ms (100% of total)

Main Thread Breakdown

Other 50% Script Evaluation 27% Style & Layout 17% Rendering 3%
ScriptTotalScriptingParse/CompileParty
Unattributable225ms32ms0ms3rd
https://planetscale.com/207ms27ms1ms3rd
https://planetscale.com/assets/index-0GhomdpU.js73ms71ms0ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public, max-age=0, must-revalidate
REVIEW
public, max-age=0, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
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+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
17 scripts, 26 KB unused
PASS
17 scripts, 26 KB unused
Warning::
https://planetscale.com/assets/chunk-UVKPFVEO-B5jX...: 26 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 26 KB
26 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://planetscale.com/assets/chunk-UVKPFVEO-B5jXhZUa.js43 KB26 KB (60%)✓3rd
https://planetscale.com/assets/SiteHeader-DCtFuno2.js26 KB—✓3rd
https://planetscale.com/assets/index-B19qoUet.js1 KB—✓3rd
https://planetscale.com/assets/debug-build-DzqYHPeH.js13 KB—✓3rd
https://planetscale.com/assets/learn.courses.sitemap_.xml_-BTE909b9.js1 KB—✓3rd
https://planetscale.com/assets/index-0GhomdpU.js44 KB—✓3rd
https://planetscale.com/assets/root-DjcIyBkO.js3 KB—✓3rd
https://planetscale.com/assets/jsx-runtime-D_OEa6wb.js1 KB—✓3rd
https://planetscale.com/assets/analytics.client-DXyPq-9d.js1 KB—✓3rd
https://planetscale.com/assets/current-euw3Jsb1.js1 KB—✓3rd

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

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
Network Waterfall
71 requests over 0ms
INFO

Performance analysis not available for this result.

Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 506ms · 64KB · €8/mo
Unattributable
Other
Costly
Execution 225ms
Transfer 0 KB
Monthly Cost €4/mo
planetscale.com
Other
Costly
Execution 207ms
Transfer 20 KB
Monthly Cost €3/mo
planetscale.com
Other
Optional
Execution 73ms
Transfer 44 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 225ms and costs ~€4/month
  • planetscale.com adds 207ms and costs ~€3/month

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

Unattributable takes 225ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

planetscale.com takes 207ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

How third-party costs are calculated

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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