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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
2
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
95
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.

728 ms

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

968 ms

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

161 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.

728 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.

2.43 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
14
6 PASS 4 REVIEW 2 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 (1.1 MiB of 1.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Bundles
Action
28 scripts, 318 KB unused
FIX
28 scripts, 318 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-0REW...: 72 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-WW7...: 70 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-J0W6...: 64 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://us-assets.i.posthog.com/static/posthog-rec...: 56 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://turso.tech/_next/static/chunks/9da6db1e-f5...: 31 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 318 KB
318 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-0REW30XRXK&cx=c&gtm=4e6460173 KB72 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WW757Q5152 KB70 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-J0W6Q1ZBNN157 KB64 KB (41%)✓3rd
https://us-assets.i.posthog.com/static/posthog-recorder.js?v=1.364.788 KB56 KB (64%)✓3rd
https://turso.tech/_next/static/chunks/9da6db1e-f59eaee33fee26f7.js58 KB31 KB (53%)✓3rd
https://us-assets.i.posthog.com/static/surveys.js?v=1.364.732 KB25 KB (80%)✓3rd
https://turso.tech/_next/static/chunks/main-app-be3d940aef6bd3eb.js1 KB—✓3rd
https://turso.tech/_next/static/chunks/app/(marketing)/layout-ad5278cd4129d028.js2 KB—✓3rd
https://turso.tech/_next/static/chunks/1635-4025438c60e972bc.js8 KB—✓3rd
https://turso.tech/_next/static/chunks/app/(marketing)/(index)/page-a14e64597ceaec31.js2 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

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

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

B
Page Weight Budget
1.1 MB transferred, 50 requests
REVIEW
1.1 MB transferred, 50 requests
Info::
Page weighs 3.4 MB (1.1 MB transferred)
Warning::
JavaScript is 855 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 855 KB
Info::
50 HTTP requests
Info::
Estimated 0.24 g CO2 per page load
1.1 MB / 2.4 MB budget
1.1 MB transferred
50 requests
0.24 g CO2 per page load
JavaScript 855.1 KiB 73%
HTML 131.9 KiB 11%
Images 105.1 KiB 9%
Fonts 47.6 KiB 4%
CSS 14.9 KiB 1%
Other 14.2 KiB 1%
Other 3.5 KiB 0%
0 2.4 MB 4.9 MB
Under budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

B
JS Execution Cost
904ms total JS execution
REVIEW
904ms total JS execution
Info::
https://turso.tech/_next/static/chunks/2117-e04720...: 208ms CPU time
Info::
https://turso.tech/_next/static/chunks/9da6db1e-f5...: 170ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-J0W6...: 162ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-0REW...: 129ms CPU time
Info::
Unattributable: 128ms CPU time
Warning::
Third-party scripts: 904ms (100% of total)

Main Thread Breakdown

Script Evaluation 65% Other 13% Script Parsing & Compilation 12% Style & Layout 4%
ScriptTotalScriptingParse/CompileParty
https://turso.tech/_next/static/chunks/2117-e0472066d7c3cf60.js208ms196ms5ms3rd
https://turso.tech/_next/static/chunks/9da6db1e-f59eaee33fee26f7.js170ms165ms4ms3rd
https://www.googletagmanager.com/gtag/js?id=G-J0W6Q1ZBNN162ms125ms25ms3rd
https://www.googletagmanager.com/gtag/js?id=G-0REW30XRXK&cx=c&gtm=4e6460129ms112ms16ms3rd
Unattributable128ms3ms0ms3rd
https://turso.tech/108ms8ms17ms3rd
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
Image Optimization
8 images, 0 KB saveable
PASS
8 images, 0 KB saveable
Info::
All images are well-optimized
8 images 105 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (48 KB)
PASS
1 fonts (48 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

48 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 FCP 728 ms LCP 968 mshttps://turso.tech/_next/static/media/e4af272ccee01ff0-s.p.woff2e4af272ccee01ff0-s.p.woff2 https://turso.tech/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 47.6 KiB — 0 ms — font-display: swap
e4af272ccee01ff0-s.p.woff2 woff2 swap
Size 48 KB
Load time 0 ms
Start 0 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 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
50 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 904ms · 553KB · €10/mo
turso.tech
Other
Costly
Execution 208ms
Transfer 33 KB
Monthly Cost €2/mo
turso.tech
Other
Optional
Execution 170ms
Transfer 58 KB
Unused 53%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 162ms
Transfer 157 KB
Unused 41%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 129ms
Transfer 173 KB
Unused 41%
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 128ms
Transfer 0 KB
Monthly Cost €1/mo
turso.tech
Other
Optional
Execution 108ms
Transfer 132 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • turso.tech adds 208ms and costs ~€2/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

turso.tech takes 208ms 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

53% of turso.tech'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

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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