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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
3
PASS
10
INFO
2

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

Mobile Desktop
89
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
55
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.
85
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.

2.71 s

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

3.16 s

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

42 ms

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

0.004

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

2.71 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.

3.92 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
17
10 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 (278.5 KiB of 278.7 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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
16 images, 0 KB saveable
REVIEW
16 images, 0 KB saveable
Warning::
https://www.schneier.com/wp-content/themes/schneie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/uploads/2019/1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/uploads/2019/1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/themes/schneie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/themes/schneie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/uploads/2019/1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/themes/schneie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/uploads/2019/1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/uploads/2019/1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.schneier.com/wp-content/uploads/2025/0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
16 images 101 KB
0 oversized -0 KB
16 legacy format
10 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

B
JS Execution Cost
619ms total JS execution
REVIEW
619ms total JS execution
Info::
https://www.schneier.com/: 218ms CPU time
Info::
Unattributable: 192ms CPU time
Info::
https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5....: 109ms CPU time
Info::
https://www.schneier.com/wp-content/plugins/jetpac...: 100ms CPU time
Warning::
Third-party scripts: 619ms (100% of total)

Main Thread Breakdown

Script Evaluation 38% Other 29% Style & Layout 17% Parse HTML & CSS 7% Script Parsing & Compilation 5% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.schneier.com/218ms7ms4ms3rd
Unattributable192ms5ms0ms3rd
https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js?ver=3.5.1109ms84ms8ms3rd
https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.chunk-main-payload.js?minify=false&ver=e9320e82ec854cf755a1100ms93ms6ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
279 KB transferred, 44 requests
PASS
279 KB transferred, 44 requests
Info::
Page weighs 669 KB (279 KB transferred)
Info::
44 HTTP requests
Info::
Estimated 0.06 g CO2 per page load
279 KB / 2.4 MB budget
279 KB transferred
44 requests
0.06 g CO2 per page load
JavaScript 138.2 KiB 50%
Images 101.1 KiB 36%
HTML 20.2 KiB 7%
CSS 18.0 KiB 6%
Other 1.2 KiB 0%
0 2.4 MB 4.9 MB
Under budget
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
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
20 scripts, 0 KB unused
PASS
20 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js?ver=3.5.128 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/hooks.min.js2 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/i18n.min.js3 KB—✓3rd
https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-assets/build/i18n-loader.js?minify=true&ver=5ba5dddc04be2306aaf03 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/vendor/wp-polyfill.min.js12 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/url.min.js4 KB—✓3rd
https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.js?minify=false&ver=d2b75ca9909f29a1a53c3 KB—✓3rd
https://stats.wp.com/w.js?ver=2026175 KB—✓3rd
https://www.schneier.com/wp-content/themes/schneier/assets/js/main.js?ver=1.0.01 KB—✓3rd
https://www.schneier.com/wp-content/themes/schneier/assets/vendor/socialshareprivacy/js/socialshareprivacy.js?ver=1.0.18 KB—✗3rd
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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
1
preload
—
dns-prefetch
1
prefetch
—

2 resource hints configured

A
Page Weight Inventory
44 resources · 279 KB · 0 KB savings available
PASS
44 resources · 279 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 279 KB
Warning::
43 third-party resources (100% of weight)
44 resources · 278.7 KiB · 43 third-party Within 1MB page-weight target
JavaScript 50% · 138.2 KiB
Image 37% · 102.2 KiB
Document 7% · 20.4 KiB
CSS 6% · 18.0 KiB
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
44 requests over 321ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.7 s LCP 3.2 shttps://schneier.com// https://schneier.com/ — 301 — 206 B — 36 ms — h2https://www.schneier.com/www.schneier.com/ https://www.schneier.com/ — 200 — 20.2 KiB — 14 ms — h2https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.chunk-main-payload.css?minify=false&ver=d2b75ca9909f29a1a53cwww.schneier.com/wp-content/plugins... https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.chunk-main-payload.css?minify=false&ver=d2b75ca9909f29a1a53c — 200 — 5.3 KiB — 5 ms — h2https://www.schneier.com/wp-content/themes/schneier/style.css?ver=1.0.0www.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/style.css?ver=1.0.0 — 200 — 697 B — 6 ms — h2https://www.schneier.com/wp-content/themes/schneier/assets/dist/css/style.css?ver=1.0.5www.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/assets/dist/css/style.css?ver=1.0.5 — 200 — 6.4 KiB — 7 ms — h2https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js?ver=3.5.1cdnjs.cloudflare.com/ajax/libs/jque... https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js?ver=3.5.1 — 200 — 28.0 KiB — 99 ms — h3https://c0.wp.com/p/woocommerce/10.7.0/assets/client/blocks/wc-blocks.cssc0.wp.com/p/woocommerce/10.7.0/asse... https://c0.wp.com/p/woocommerce/10.7.0/assets/client/blocks/wc-blocks.css — 200 — 2.9 KiB — 24 ms — h2https://www.schneier.com/wp-content/uploads/2019/10/rss-32px.pngwww.schneier.com/wp-content/uploads... https://www.schneier.com/wp-content/uploads/2019/10/rss-32px.png — 200 — 2.8 KiB — 7 ms — h2https://www.schneier.com/wp-content/uploads/2019/10/facebook-32px.pngwww.schneier.com/wp-content/uploads... https://www.schneier.com/wp-content/uploads/2019/10/facebook-32px.png — 200 — 2.2 KiB — 8 ms — h2https://www.schneier.com/wp-content/uploads/2019/10/twitter-32px.pngwww.schneier.com/wp-content/uploads... https://www.schneier.com/wp-content/uploads/2019/10/twitter-32px.png — 200 — 2.4 KiB — 6 ms — h3https://www.schneier.com/wp-content/uploads/2019/10/email-32px.pngwww.schneier.com/wp-content/uploads... https://www.schneier.com/wp-content/uploads/2019/10/email-32px.png — 200 — 2.1 KiB — 6 ms — h3https://www.schneier.com/wp-content/uploads/2019/10/Bruce-Schneier.jpgwww.schneier.com/wp-content/uploads... https://www.schneier.com/wp-content/uploads/2019/10/Bruce-Schneier.jpg — 200 — 10.7 KiB — 4 ms — h3https://c0.wp.com/c/6.9.4/wp-includes/js/dist/hooks.min.jsc0.wp.com/c/6.9.4/wp-includes/js/di... https://c0.wp.com/c/6.9.4/wp-includes/js/dist/hooks.min.js — 200 — 2.3 KiB — 8 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/i18n.min.jsc0.wp.com/c/6.9.4/wp-includes/js/di... https://c0.wp.com/c/6.9.4/wp-includes/js/dist/i18n.min.js — 200 — 2.5 KiB — 6 ms — h2https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-assets/build/i18n-loader.js?minify=true&ver=5ba5dddc04be2306aaf0www.schneier.com/wp-content/plugins... https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-assets/build/i18n-loader.js?minify=true&ver=5ba5dddc04be2306aaf0 — 200 — 2.7 KiB — 5 ms — h3https://c0.wp.com/c/6.9.4/wp-includes/js/dist/vendor/wp-polyfill.min.jsc0.wp.com/c/6.9.4/wp-includes/js/di... https://c0.wp.com/c/6.9.4/wp-includes/js/dist/vendor/wp-polyfill.min.js — 200 — 12.3 KiB — 3 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/url.min.jsc0.wp.com/c/6.9.4/wp-includes/js/di... https://c0.wp.com/c/6.9.4/wp-includes/js/dist/url.min.js — 200 — 4.1 KiB — 4 ms — h3https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.js?minify=false&ver=d2b75ca9909f29a1a53cwww.schneier.com/wp-content/plugins... https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.js?minify=false&ver=d2b75ca9909f29a1a53c — 200 — 3.1 KiB — 4 ms — h3https://stats.wp.com/w.js?ver=202617stats.wp.com/w.js?ver=202617 https://stats.wp.com/w.js?ver=202617 — 200 — 5.1 KiB — 6 ms — h2https://www.schneier.com/wp-content/themes/schneier/assets/js/main.js?ver=1.0.0www.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/assets/js/main.js?ver=1.0.0 — 200 — 627 B — 3 ms — h3https://www.schneier.com/wp-content/themes/schneier/assets/vendor/socialshareprivacy/js/socialshareprivacy.js?ver=1.0.1www.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/assets/vendor/socialshareprivacy/js/socialshareprivacy.js?ver=1.0.1 — 200 — 7.6 KiB — 5 ms — h3https://www.schneier.com/wp-content/themes/schneier/assets/vendor/socialshareprivacy/js/icons.js?ver=1.0.0www.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/assets/vendor/socialshareprivacy/js/icons.js?ver=1.0.0 — 200 — 2.4 KiB — 6 ms — h3https://c0.wp.com/p/woocommerce/10.7.0/assets/js/sourcebuster/sourcebuster.min.jsc0.wp.com/p/woocommerce/10.7.0/asse... https://c0.wp.com/p/woocommerce/10.7.0/assets/js/sourcebuster/sourcebuster.min.js — 200 — 5.2 KiB — 3 ms — h3https://c0.wp.com/p/woocommerce/10.7.0/assets/js/frontend/order-attribution.min.jsc0.wp.com/p/woocommerce/10.7.0/asse... https://c0.wp.com/p/woocommerce/10.7.0/assets/js/frontend/order-attribution.min.js — 200 — 1.5 KiB — 3 ms — h3https://c0.wp.com/p/woocommerce/10.7.0/assets/js/jquery-cookie/jquery.cookie.min.jsc0.wp.com/p/woocommerce/10.7.0/asse... https://c0.wp.com/p/woocommerce/10.7.0/assets/js/jquery-cookie/jquery.cookie.min.js — 200 — 1.1 KiB — 2 ms — h3https://stats.wp.com/s-202617.jsstats.wp.com/s-202617.js https://stats.wp.com/s-202617.js — 200 — 4.2 KiB — 2 ms — h2https://www.schneier.com/wp-content/uploads/2025/05/book-rewiring-200w.jpgwww.schneier.com/wp-content/uploads... https://www.schneier.com/wp-content/uploads/2025/05/book-rewiring-200w.jpg — 200 — 23.5 KiB — 6 ms — h3https://www.schneier.com/wp-content/themes/schneier/assets/images/join-eff@2x.pngwww.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/assets/images/join-eff@2x.png — 200 — 13.6 KiB — 3 ms — h3https://www.schneier.com/wp-content/themes/schneier/assets/images/support-epic@2x.pngwww.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/assets/images/support-epic@2x.png — 200 — 30.6 KiB — 5 ms — h3https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/woocommerce-analytics/build/woocommerce-analytics-client.js?minify=false&ver=e434986d5efc1358e217www.schneier.com/wp-content/plugins... https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/woocommerce-analytics/build/woocommerce-analytics-client.js?minify=false&ver=e434986d5efc1358e217 — 200 — 4.7 KiB — 3 ms — h3
0 ms 1.0 s 2.0 s 3.0 s FCP 2.7 s LCP 3.2 shttps://schneier.com// https://schneier.com/ — 301 — 206 B — 36 ms — h2https://www.schneier.com/www.schneier.com/ https://www.schneier.com/ — 200 — 20.2 KiB — 14 ms — h2https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.chunk-main-payload.css?minify=false&ver=d2b75ca9909f29a1a53cwww.schneier.com/wp-content/plugins... https://www.schneier.com/wp-content/plugins/jetpack/jetpack_vendor/automattic/jetpack-search/build/instant-search/jp-search.chunk-main-payload.css?minify=false&ver=d2b75ca9909f29a1a53c — 200 — 5.3 KiB — 5 ms — h2https://www.schneier.com/wp-content/themes/schneier/style.css?ver=1.0.0www.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/style.css?ver=1.0.0 — 200 — 697 B — 6 ms — h2https://www.schneier.com/wp-content/themes/schneier/assets/dist/css/style.css?ver=1.0.5www.schneier.com/wp-content/themes/... https://www.schneier.com/wp-content/themes/schneier/assets/dist/css/style.css?ver=1.0.5 — 200 — 6.4 KiB — 7 ms — h2https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js?ver=3.5.1cdnjs.cloudflare.com/ajax/libs/jque... https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js?ver=3.5.1 — 200 — 28.0 KiB — 99 ms — h3https://c0.wp.com/p/woocommerce/10.7.0/assets/client/blocks/wc-blocks.cssc0.wp.com/p/woocommerce/10.7.0/asse... https://c0.wp.com/p/woocommerce/10.7.0/assets/client/blocks/wc-blocks.css — 200 — 2.9 KiB — 24 ms — h2https://www.schneier.com/wp-content/uploads/2019/10/rss-32px.pngwww.schneier.com/wp-content/uploads... https://www.schneier.com/wp-content/uploads/2019/10/rss-32px.png — 200 — 2.8 KiB — 7 ms — h2https://www.schneier.com/wp-content/uploads/2019/10/facebook-32px.pngwww.schneier.com/wp-content/uploads... https://www.schneier.com/wp-content/uploads/2019/10/facebook-32px.png — 200 — 2.2 KiB — 8 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
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 619ms · 69KB · $4/mo
www.schneier.com
Other
Costly
Execution 218ms
Transfer 20 KB
Monthly Cost $1/mo
Unattributable
Other
Optional
Execution 192ms
Transfer 0 KB
Monthly Cost $1/mo
cdnjs
CDN
Optional
Execution 109ms
Transfer 28 KB
Monthly Cost $1/mo
www.schneier.com
Other
Optional
Execution 100ms
Transfer 21 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.schneier.com adds 218ms and costs ~$1/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

www.schneier.com takes 218ms 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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