Skip to content
https://www.turso.tech

Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
3
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
68
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.

2.31 s

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

3.06 s

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

1.15 s

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.

2.31 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.

9.82 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
16
8 PASS 3 REVIEW 3 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 (1.0 MiB of 1.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2902ms total JS execution
FIX
2902ms total JS execution
Warning::
https://turso.tech/_next/static/chunks/9da6db1e-f5...: 535ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-0REW...: 505ms CPU time
Warning::
https://turso.tech/: 447ms CPU time
Warning::
https://turso.tech/_next/static/chunks/2117-e04720...: 415ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-J0W6...: 411ms CPU time
Warning::
Third-party scripts: 2902ms (100% of total)

Main Thread Breakdown

Script Evaluation 65% Script Parsing & Compilation 13% Other 10% Style & Layout 6% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://turso.tech/_next/static/chunks/9da6db1e-f59eaee33fee26f7.js535ms516ms17ms3rd
https://www.googletagmanager.com/gtag/js?id=G-0REW30XRXK&cx=c&gtm=4e6461h2505ms416ms86ms3rd
https://turso.tech/447ms19ms91ms3rd
https://turso.tech/_next/static/chunks/2117-e0472066d7c3cf60.js415ms385ms12ms3rd
https://www.googletagmanager.com/gtag/js?id=G-J0W6Q1ZBNN411ms352ms54ms3rd
Unattributable287ms12ms0ms3rd
https://turso.tech/_next/static/chunks/fd9d1056-1a2b78fbc8e86811.js140ms123ms15ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WW757Q5110ms62ms46ms3rd
https://us-assets.i.posthog.com/static/posthog-recorder.js?v=1.364.754ms30ms22ms3rd
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 (42%)
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=4e6461h2173 KB72 KB (42%)✓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
1.0 MB transferred, 42 requests
REVIEW
1.0 MB transferred, 42 requests
Info::
Page weighs 3.3 MB (1.0 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::
42 HTTP requests
Info::
Estimated 0.22 g CO2 per page load
1.0 MB / 2.4 MB budget
1.0 MB transferred
42 requests
0.22 g CO2 per page load
JavaScript 855.2 KiB 80%
HTML 131.9 KiB 12%
Fonts 47.5 KiB 4%
CSS 14.9 KiB 1%
Other 13.7 KiB 1%
Other 3.5 KiB 0%
Images 1.6 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

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
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 2 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 1.0 s 2.0 s 3.0 s FCP 2.3 s LCP 3.1 shttps://turso.tech/_next/static/media/e4af272ccee01ff0-s.p.woff2e4af272ccee01ff0-s.p.woff2 https://turso.tech/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 47.5 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
—
preload
4
dns-prefetch
—
prefetch
—

4 resource hints configured

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
Network Waterfall
42 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 2902ms · 847KB · €32/mo
turso.tech
Other
Costly
Execution 535ms
Transfer 58 KB
Unused 53%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 505ms
Transfer 173 KB
Unused 42%
Monthly Cost €5/mo
turso.tech
Other
Costly
Execution 447ms
Transfer 132 KB
Monthly Cost €5/mo
turso.tech
Other
Costly
Execution 415ms
Transfer 33 KB
Monthly Cost €5/mo
Google Tag Manager
Tag Manager
Costly
Execution 411ms
Transfer 157 KB
Unused 41%
Monthly Cost €4/mo
Unattributable
Other
Costly
Execution 287ms
Transfer 0 KB
Monthly Cost €3/mo
turso.tech
Other
Optional
Execution 140ms
Transfer 54 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 110ms
Transfer 152 KB
Unused 46%
Monthly Cost €1/mo
us-assets.i.posthog.com
Other
Optional
Execution 54ms
Transfer 88 KB
Unused 64%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • turso.tech adds 535ms and costs ~€6/month
  • Google Tag Manager adds 505ms and costs ~€5/month
  • turso.tech adds 447ms and costs ~€5/month
  • turso.tech adds 415ms and costs ~€5/month
  • Google Tag Manager adds 411ms and costs ~€4/month
  • Unattributable adds 287ms 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

turso.tech takes 535ms 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

Google Tag Manager takes 505ms 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

turso.tech takes 447ms 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

turso.tech takes 415ms 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

Google Tag Manager takes 411ms 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

Unattributable takes 287ms 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

64% of us-assets.i.posthog.com'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.

Send Feedback