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https://www.11ty.dev

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
97
GRADE
A+
FIX
0
REVIEW
3
PASS
9
INFO
2

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

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

1.36 s

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

1.45 s

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

41 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.

1.36 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.

1.45 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
9 PASS 3 REVIEW
B
JS Execution Cost
937ms total JS execution
REVIEW
937ms total JS execution
Warning::
https://www.11ty.dev/29plZzulZt.js: 380ms CPU time
Warning::
https://www.11ty.dev/: 343ms CPU time
Info::
Unattributable: 214ms CPU time
Info::
Third-party scripts: 214ms (23% of total)

Main Thread Breakdown

Style & Layout 50% Other 25% Script Evaluation 10% Rendering 8% Parse HTML & CSS 7%
ScriptTotalScriptingParse/CompileParty
https://www.11ty.dev/29plZzulZt.js380ms29ms0ms1st
https://www.11ty.dev/343ms27ms1ms1st
Unattributable214ms36ms0ms3rd
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::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
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
98 KB transferred, 10 requests
PASS
98 KB transferred, 10 requests
Info::
Page weighs 272 KB (98 KB transferred)
Info::
10 HTTP requests
Info::
Estimated 0.02 g CO2 per page load
98 KB / 2.4 MB budget
98 KB transferred
10 requests
0.02 g CO2 per page load
HTML 37.9 KiB 39%
Fonts 21.4 KiB 22%
JavaScript 14.4 KiB 15%
Images 13.3 KiB 13%
CSS 9.7 KiB 10%
Other 1.7 KiB 2%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
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 13 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
2 fonts (21 KB)
PASS
2 fonts (21 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

21 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 1.5 s FCP 1.4 s LCP 1.5 shttps://www.11ty.dev/css/fonts/benchnine-bold.woff2benchnine-bold.woff2 https://www.11ty.dev/css/fonts/benchnine-bold.woff2 — 9.0 KiB — 0 ms — font-display: swaphttps://www.11ty.dev/css/fonts/robotomono-regular.woff2robotomono-regular.woff2 https://www.11ty.dev/css/fonts/robotomono-regular.woff2 — 12.4 KiB — 0 ms — font-display: swap
benchnine-bold.woff2 woff2 swap
Size 9 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
robotomono-regular.woff2 woff2 swap
Size 12 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
JS Bundles
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
Warning::
https://www.11ty.dev/29plZzulZt.js: unminified — 3 KB could be saved
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.11ty.dev/zyQzThPHos.js4 KB—✓1st
https://www.11ty.dev/29plZzulZt.js10 KB—✗1st
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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
—

1 resource hints configured

Network Waterfall
10 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
23% of JavaScript execution is third-party
First-party Third-party 214ms · 0KB · €1/mo
Unattributable
Other
Costly
Execution 214ms
Transfer 0 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 214ms and costs ~€1/month

Unattributable takes 214ms 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

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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