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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
37
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
98
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

1.02 s

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

3.62 s

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

406 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.462

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.13 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.

4.53 s

Page Load Progression

719 ms
1.4 s
2.2 s
2.9 s
3.6 s
4.3 s
5.0 s
5.8 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
3.4 MB transferred, 132 requests
FIX
3.4 MB transferred, 132 requests
Warning::
Page weighs 12.5 MB (3.4 MB transferred)
Warning::
JavaScript is 2.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.0 MB
Info::
Fonts are 274 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 274 KB
Warning::
132 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.71 g CO2 per page load
3.4 MB / 2.4 MB budget
3.4 MB transferred
132 requests
0.71 g CO2 per page load
JavaScript 2.0 MiB 58%
Images 838.6 KiB 24%
Fonts 274.0 KiB 8%
Other 141.5 KiB 4%
HTML 84.0 KiB 2%
Other 60.2 KiB 2%
CSS 36.0 KiB 1%
Other 3.0 KiB 0%
Other 1.2 KiB 0%
Other 350 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over 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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

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 (3.4 MiB of 3.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2595ms total JS execution
FIX
2595ms total JS execution
Warning::
https://marketing-assets.calendly.com/_next/static...: 1142ms CPU time
Warning::
https://calendly.com/: 846ms CPU time
Info::
Unattributable: 236ms CPU time
Info::
https://marketing-assets.calendly.com/_next/static...: 112ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-W3R...: 107ms CPU time
Warning::
Third-party scripts: 2595ms (100% of total)

Main Thread Breakdown

Script Evaluation 40% Other 24% Style & Layout 16% Script Parsing & Compilation 8% Parse HTML & CSS 6% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://marketing-assets.calendly.com/_next/static/chunks/0wcez47q7d~ix.js1142ms795ms5ms3rd
https://calendly.com/846ms5ms7ms3rd
Unattributable236ms17ms0ms3rd
https://marketing-assets.calendly.com/_next/static/chunks/03~y8y.mm.187.js112ms4ms105ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W3RGHP8107ms84ms11ms3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js100ms69ms30ms3rd
https://www.googletagmanager.com/gtag/js?id=AW-725106552&cx=c&gtm=4e646052ms44ms8ms3rd
F
JS Bundles
Action
26 scripts, 1.3 MB unused
FIX
26 scripts, 1.3 MB unused
Warning::
https://marketing-assets.calendly.com/_next/static...: 686 KB unused (92%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://marketing-assets.calendly.com/_next/static...: 249 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 157 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-W3R...: 79 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-725...: 64 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.3 MB
1306 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://marketing-assets.calendly.com/_next/static/chunks/03~y8y.mm.187.js747 KB686 KB (92%)✓3rd
https://marketing-assets.calendly.com/_next/static/chunks/09jveylm1qq.y.js381 KB249 KB (65%)✓3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js257 KB157 KB (61%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W3RGHP8167 KB79 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-725106552&cx=c&gtm=4e6460144 KB64 KB (45%)✓3rd
https://marketing-assets.calendly.com/_next/static/chunks/0magscpdntu-h.js26 KB26 KB (98%)✓3rd
https://marketing-assets.calendly.com/_next/static/chunks/0wcez47q7d~ix.js69 KB24 KB (35%)✓3rd
https://marketing-assets.calendly.com/_next/static/chunks/0dpzkd19qq3rb.js37 KB21 KB (57%)✓3rd
https://marketing-assets.calendly.com/_next/static/chunks/134y3i3gfugxs.js15 KB—✓3rd
https://snippet.maze.co/maze-universal-loader.js?apiKey=f7d8a032-7fe8-4549-a433-ecbaf290cbaa3 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

F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
46 images, 0 KB saveable
REVIEW
46 images, 0 KB saveable
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/nirfrq5t... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/3x97SWL0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/5f4urpcD... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/6PFPRWMR... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/4AUQ47IN... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/3YVXIhGt... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/6fo1ntHs... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/3L8hrM2H... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/6OTuIytC... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/4UQZOyPU... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/1iXaOfST... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/42r0sVud... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/68QvXpmE... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/5iPdwT12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/64o3Zzxm... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/4DaLXMiJ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://marketing-assets.calendly.com/media/logo.s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/7bQs7qA7... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/7yrXYudS... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/2APzJ2NN... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/Fk2s4fCN... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/Y595RQBD... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/2rhQcGrS... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/263kzYvo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/k5u1aoWg... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/7xVuRmZc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://calendly.com/media/googleLogo.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/6W5mnZM4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/x2WxpmYJ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/42drnxHf... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.ctfassets.net/k0lk9kiuza3o/bOnLOncE... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
46 images 810 KB
0 oversized -0 KB
28 legacy format
32 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

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
8 fonts (274 KB)
PASS
8 fonts (274 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

274 KB total

Render-blocking

0

of 8

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 1.0 s LCP 3.6 shttps://marketing-assets.calendly.com/_next/static/media/Gilroy_Bold-s.p.04bhoiwyq-juo.woffGilroy_Bold-s.p.04bhoiw... https://marketing-assets.calendly.com/_next/static/media/Gilroy_Bold-s.p.04bhoiwyq-juo.woff — 40.3 KiB — 0 ms — font-display: swaphttps://marketing-assets.calendly.com/_next/static/media/Gilroy_Bold-s.p.13gv~l_fv7sra.woff2Gilroy_Bold-s.p.13gv~l_... https://marketing-assets.calendly.com/_next/static/media/Gilroy_Bold-s.p.13gv~l_fv7sra.woff2 — 29.2 KiB — 0 ms — font-display: swaphttps://marketing-assets.calendly.com/_next/static/media/Gilroy_Medium-s.p.0qvc.euvgjqei.woff2Gilroy_Medium-s.p.0qvc.... https://marketing-assets.calendly.com/_next/static/media/Gilroy_Medium-s.p.0qvc.euvgjqei.woff2 — 29.1 KiB — 0 ms — font-display: swaphttps://marketing-assets.calendly.com/_next/static/media/Gilroy_Medium-s.p.121f28399vp96.woffGilroy_Medium-s.p.121f2... https://marketing-assets.calendly.com/_next/static/media/Gilroy_Medium-s.p.121f28399vp96.woff — 40.3 KiB — 0 ms — font-display: swaphttps://marketing-assets.calendly.com/_next/static/media/Gilroy_Regular-s.p.01odboa4cxtsh.woff2Gilroy_Regular-s.p.01od... https://marketing-assets.calendly.com/_next/static/media/Gilroy_Regular-s.p.01odboa4cxtsh.woff2 — 28.0 KiB — 0 ms — font-display: swaphttps://marketing-assets.calendly.com/_next/static/media/Gilroy_Regular-s.p.0yn2ngkxudbp~.woffGilroy_Regular-s.p.0yn2... https://marketing-assets.calendly.com/_next/static/media/Gilroy_Regular-s.p.0yn2ngkxudbp~.woff — 38.7 KiB — 0 ms — font-display: swaphttps://marketing-assets.calendly.com/_next/static/media/Gilroy_SemiBold-s.p.08m0br4jnzobt.woff2Gilroy_SemiBold-s.p.08m... https://marketing-assets.calendly.com/_next/static/media/Gilroy_SemiBold-s.p.08m0br4jnzobt.woff2 — 28.6 KiB — 0 ms — font-display: swaphttps://marketing-assets.calendly.com/_next/static/media/Gilroy_SemiBold-s.p.0~ptal6aajru3.woffGilroy_SemiBold-s.p.0~p... https://marketing-assets.calendly.com/_next/static/media/Gilroy_SemiBold-s.p.0~ptal6aajru3.woff — 39.7 KiB — 0 ms — font-display: swap
Gilroy_Bold-s.p.04bhoiw... woff swap
Size 40 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Gilroy_Bold-s.p.13gv~l_... woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Gilroy_Medium-s.p.0qvc.... woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Gilroy_Medium-s.p.121f2... woff swap
Size 40 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Gilroy_Regular-s.p.01od... woff2 swap
Size 28 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Gilroy_Regular-s.p.0yn2... woff swap
Size 39 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
Gilroy_SemiBold-s.p.08m... woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Gilroy_SemiBold-s.p.0~p... woff swap
Size 40 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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)

Fixing the unchecked items could save ~48 KB and ~96 ms

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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
132 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 2595ms · 1468KB · €45/mo
marketing-assets.calendly.com
Other
Costly
Execution 1142ms
Transfer 69 KB
Unused 35%
Monthly Cost €20/mo
calendly.com
Other
Costly
Execution 846ms
Transfer 84 KB
Monthly Cost €15/mo
Unattributable
Other
Costly
Execution 236ms
Transfer 0 KB
Monthly Cost €4/mo
marketing-assets.calendly.com
Other
Optional
Execution 112ms
Transfer 747 KB
Unused 92%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 107ms
Transfer 167 KB
Unused 47%
Monthly Cost €2/mo
cdn.ketchjs.com
Other
Optional
Execution 100ms
Transfer 257 KB
Unused 61%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 52ms
Transfer 144 KB
Unused 45%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • marketing-assets.calendly.com adds 1142ms and costs ~€20/month
  • calendly.com adds 846ms and costs ~€15/month
  • Unattributable adds 236ms 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.

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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

marketing-assets.calendly.com takes 1142ms 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

calendly.com takes 846ms 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 236ms 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

92% of marketing-assets.calendly.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

61% of cdn.ketchjs.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.

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