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Performance

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

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

Mobile Desktop
93
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.
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.

567 ms

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

1.18 s

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

167 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.

936 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.

1.45 s

Page Load Progression

468 ms
937 ms
1.4 s
1.9 s
2.3 s
2.8 s
3.3 s
3.7 s
Checks
14
7 PASS 3 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 (967.4 KiB of 967.6 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
JS Execution Cost
Action
1087ms total JS execution
REVIEW
1087ms total JS execution
Info::
https://turborepo.dev/: 247ms CPU time
Info::
https://turborepo.dev/_next/static/chunks/18bubx_d...: 241ms CPU time
Info::
https://turborepo.dev/_next/static/chunks/0zhvh253...: 184ms CPU time
Info::
https://turborepo.dev/_next/static/chunks/0grf_cr1...: 177ms CPU time
Info::
Unattributable: 131ms CPU time
Warning::
Third-party scripts: 1087ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Other 17% Style & Layout 14% Script Parsing & Compilation 9% Rendering 7%
ScriptTotalScriptingParse/CompileParty
https://turborepo.dev/247ms8ms8ms3rd
https://turborepo.dev/_next/static/chunks/18bubx_dzn8wd.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG241ms207ms7ms3rd
https://turborepo.dev/_next/static/chunks/0zhvh253il8cl.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG184ms182ms1ms3rd
https://turborepo.dev/_next/static/chunks/0grf_cr1gt3-0.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG177ms57ms4ms3rd
Unattributable131ms5ms0ms3rd
https://turborepo.dev/_next/static/chunks/17mu01cho.7j6.js?dpl=dpl_AhZCer3oC1s88hXSV6KywotPDJVG107ms106ms1ms3rd
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
968 KB transferred, 80 requests
PASS
968 KB transferred, 80 requests
Info::
Page weighs 3.3 MB (968 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::
80 HTTP requests
Info::
Estimated 0.20 g CO2 per page load
968 KB / 2.4 MB budget
968 KB transferred
80 requests
0.20 g CO2 per page load
JavaScript 802.4 KiB 83%
Fonts 58.7 KiB 6%
CSS 39.4 KiB 4%
HTML 24.1 KiB 2%
Other 24.0 KiB 2%
Other 11.6 KiB 1%
Images 7.4 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
8 images, 0 KB saveable
PASS
8 images, 0 KB saveable
Info::
All images are well-optimized
8 images 7 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 500 ms 1.0 s FCP 567 ms LCP 1.2 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
80 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 1087ms · 129KB · €12/mo
turborepo.dev
Other
Costly
Execution 247ms
Transfer 0 KB
Monthly Cost €3/mo
turborepo.dev
Other
Costly
Execution 241ms
Transfer 71 KB
Unused 33%
Monthly Cost €3/mo
turborepo.dev
Other
Optional
Execution 184ms
Transfer 11 KB
Monthly Cost €2/mo
turborepo.dev
Other
Optional
Execution 177ms
Transfer 40 KB
Unused 71%
Monthly Cost €2/mo
Unattributable
Other
Optional
Execution 131ms
Transfer 0 KB
Monthly Cost €1/mo
turborepo.dev
Other
Optional
Execution 107ms
Transfer 7 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • turborepo.dev adds 247ms and costs ~€3/month
  • turborepo.dev adds 241ms 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

turborepo.dev takes 247ms 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 241ms 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

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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