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https://turbo.build

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
79
GRADE
C
FIX
3
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
50
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
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.

3.79 s

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

7.14 s

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

573 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.

5.41 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.

7.23 s

Page Load Progression

587 ms
1.2 s
1.8 s
2.3 s
2.9 s
3.5 s
4.1 s
4.7 s
Checks
14
7 PASS 2 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 (966.8 KiB of 966.9 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4427ms total JS execution
FIX
4427ms total JS execution
Warning::
https://turborepo.dev/_next/static/chunks/18bubx_d...: 1057ms CPU time
Warning::
https://turborepo.dev/: 817ms CPU time
Warning::
https://turborepo.dev/_next/static/chunks/0zhvh253...: 722ms CPU time
Warning::
https://turborepo.dev/_next/static/chunks/0grf_cr1...: 656ms CPU time
Warning::
https://turborepo.dev/_next/static/chunks/17mu01ch...: 356ms CPU time
Warning::
Third-party scripts: 4427ms (100% of total)

Main Thread Breakdown

Script Evaluation 52% Other 16% Style & Layout 14% Script Parsing & Compilation 10% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://turborepo.dev/_next/static/chunks/18bubx_dzn8wd.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG1057ms830ms55ms3rd
https://turborepo.dev/817ms25ms33ms3rd
https://turborepo.dev/_next/static/chunks/0zhvh253il8cl.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG722ms716ms5ms3rd
https://turborepo.dev/_next/static/chunks/0grf_cr1gt3-0.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG656ms225ms15ms3rd
https://turborepo.dev/_next/static/chunks/17mu01cho.7j6.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG356ms334ms5ms3rd
Unattributable352ms17ms0ms3rd
https://turborepo.dev/_next/static/chunks/0u9800iq0j6k4.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG163ms48ms88ms3rd
https://turborepo.dev/_next/static/chunks/0jpsxqebiafav.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG134ms82ms32ms3rd
https://turborepo.dev/_next/static/chunks/0laj74pxovg~a.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG117ms116ms1ms3rd
https://turborepo.dev/_next/static/chunks/06v~4zbsc~-e0.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG53ms1ms52ms3rd
D
JS Bundles
Action
38 scripts, 315 KB unused
FIX
38 scripts, 315 KB unused
Warning::
https://turborepo.dev/_next/static/chunks/0u9800iq...: 125 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://turborepo.dev/_next/static/chunks/06v~4zbs...: 94 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://turborepo.dev/_next/static/chunks/0paypp_y...: 45 KB unused (100%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://turborepo.dev/_next/static/chunks/0grf_cr1...: 28 KB unused (71%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://turborepo.dev/_next/static/chunks/18bubx_d...: 24 KB unused (33%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 315 KB
315 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://turborepo.dev/_next/static/chunks/0u9800iq0j6k4.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG176 KB125 KB (73%)✓3rd
https://turborepo.dev/_next/static/chunks/06v~4zbsc~-e0.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG120 KB94 KB (80%)✓3rd
https://turborepo.dev/_next/static/chunks/0paypp_ypnc3m.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG45 KB45 KB (100%)✓3rd
https://turborepo.dev/_next/static/chunks/0grf_cr1gt3-0.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG40 KB28 KB (71%)✓3rd
https://turborepo.dev/_next/static/chunks/18bubx_dzn8wd.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG71 KB24 KB (33%)✓3rd
https://turborepo.dev/_next/static/chunks/0t7lfra.oxrbg.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG14 KB—✓3rd
https://turborepo.dev/_next/static/chunks/0f2lz92is2xct.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG30 KB—✓3rd
https://turborepo.dev/_next/static/chunks/0nngslx5s91vn.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG8 KB—✓3rd
https://turborepo.dev/_next/static/chunks/14yvw9mucxk6c.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG7 KB—✓3rd
https://turborepo.dev/_next/static/chunks/04mdq-j-pnsk7.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG10 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

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
Page Weight Budget
967 KB transferred, 67 requests
PASS
967 KB transferred, 67 requests
Info::
Page weighs 3.3 MB (967 KB transferred)
Warning::
JavaScript is 802 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 802 KB
Info::
67 HTTP requests
Info::
Estimated 0.20 g CO2 per page load
967 KB / 2.4 MB budget
967 KB transferred
67 requests
0.20 g CO2 per page load
JavaScript 802.4 KiB 83%
Fonts 58.8 KiB 6%
CSS 39.2 KiB 4%
HTML 24.1 KiB 2%
Other 21.8 KiB 2%
Other 11.2 KiB 1%
Images 9.5 KiB 1%
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

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
6 images, 0 KB saveable
PASS
6 images, 0 KB saveable
Info::
All images are well-optimized
6 images 9 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (59 KB)
PASS
2 fonts (59 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

59 KB total

Render-blocking

0

of 2

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 3.8 s LCP 7.1 shttps://turborepo.dev/_next/static/media/797e433ab948586e-s.p.0.q-h669a_dqa.woff2?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG797e433ab948586e-s.p.0.... https://turborepo.dev/_next/static/media/797e433ab948586e-s.p.0.q-h669a_dqa.woff2?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG — 30.8 KiB — 0 ms — font-display: swaphttps://turborepo.dev/_next/static/media/caa3a2e1cccd8315-s.p.16t1db8_9y2o~.woff2?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVGcaa3a2e1cccd8315-s.p.16... https://turborepo.dev/_next/static/media/caa3a2e1cccd8315-s.p.16t1db8_9y2o~.woff2?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG — 27.9 KiB — 0 ms — font-display: swap
797e433ab948586e-s.p.0.... woff2 swap
Size 31 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
caa3a2e1cccd8315-s.p.16... woff2 swap
Size 28 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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
—
preload
3
dns-prefetch
—
prefetch
—

3 resource hints configured

Network Waterfall
67 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 4427ms · 464KB · €48/mo
turborepo.dev
Other
Costly
Execution 1057ms
Transfer 71 KB
Unused 33%
Monthly Cost €11/mo
turborepo.dev
Other
Costly
Execution 817ms
Transfer 0 KB
Monthly Cost €9/mo
turborepo.dev
Other
Costly
Execution 722ms
Transfer 11 KB
Monthly Cost €8/mo
turborepo.dev
Other
Costly
Execution 656ms
Transfer 40 KB
Unused 71%
Monthly Cost €7/mo
turborepo.dev
Other
Costly
Execution 356ms
Transfer 7 KB
Monthly Cost €4/mo
Unattributable
Other
Costly
Execution 352ms
Transfer 0 KB
Monthly Cost €4/mo
turborepo.dev
Other
Optional
Execution 163ms
Transfer 176 KB
Unused 73%
Monthly Cost €2/mo
turborepo.dev
Other
Optional
Execution 134ms
Transfer 37 KB
Monthly Cost €1/mo
turborepo.dev
Other
Optional
Execution 117ms
Transfer 1 KB
Monthly Cost €1/mo
turborepo.dev
Other
Optional
Execution 53ms
Transfer 120 KB
Unused 80%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • turborepo.dev adds 1057ms and costs ~€11/month
  • turborepo.dev adds 817ms and costs ~€9/month
  • turborepo.dev adds 722ms and costs ~€8/month
  • turborepo.dev adds 656ms and costs ~€7/month
  • turborepo.dev adds 356ms and costs ~€4/month
  • Unattributable adds 352ms and costs ~€4/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

turborepo.dev takes 1057ms 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

turborepo.dev takes 817ms 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

turborepo.dev takes 722ms 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

turborepo.dev takes 656ms 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

71% of turborepo.dev'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

turborepo.dev takes 356ms 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 352ms 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

73% of turborepo.dev'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

80% of turborepo.dev'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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