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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
66
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.
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.

814 ms

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

952 ms

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

0 ms

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

0.003

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

814 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.

961 ms

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
15
9 PASS 2 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 (297.6 KiB of 297.8 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
15 images, 0 KB saveable
REVIEW
15 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/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/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.
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.
15 images 120 KB
0 oversized -0 KB
15 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
298 KB transferred, 43 requests
PASS
298 KB transferred, 43 requests
Info::
Page weighs 688 KB (298 KB transferred)
Info::
43 HTTP requests
Info::
Estimated 0.06 g CO2 per page load
298 KB / 2.4 MB budget
298 KB transferred
43 requests
0.06 g CO2 per page load
JavaScript 138.1 KiB 46%
Images 120.3 KiB 40%
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+
JS Execution Cost
60ms total JS execution
PASS
60ms total JS execution
Info::
https://www.schneier.com/: 60ms CPU time
Warning::
Third-party scripts: 60ms (100% of total)

Main Thread Breakdown

Script Evaluation 41% Other 25% Style & Layout 19% Parse HTML & CSS 6% Script Parsing & Compilation 5% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.schneier.com/60ms2ms1ms3rd
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
43 resources · 298 KB · 0 KB savings available
PASS
43 resources · 298 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 298 KB
Warning::
42 third-party resources (100% of weight)
43 resources · 297.8 KiB · 42 third-party Within 1MB page-weight target
JavaScript 46% · 138.1 KiB
Image 41% · 121.3 KiB
Document 7% · 20.4 KiB
CSS 6% · 18.0 KiB
Network Waterfall
43 requests over 290ms
INFO
0 ms 500 ms 1.0 s FCP 814 ms LCP 952 mshttps://schneier.com// https://schneier.com/ — 301 — 206 B — 32 ms — h2https://www.schneier.com/www.schneier.com/ https://www.schneier.com/ — 200 — 20.2 KiB — 7 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 — 14 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 — 15 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 — 10 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 — 66 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 — 7 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 — 13 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 — 14 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 — 5 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 — 5 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 — 5 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 — 2 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 — 3 ms — h3https://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 — 3 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 — 12.2 KiB — 3 ms — h3https://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 — 3 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 — 18 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 — 5 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 — 4 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 — 4 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 — 3 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 — 8 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 — 10 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 — 12 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 — 13 ms — h3
0 ms 500 ms 1.0 s FCP 814 ms LCP 952 mshttps://schneier.com// https://schneier.com/ — 301 — 206 B — 32 ms — h2https://www.schneier.com/www.schneier.com/ https://www.schneier.com/ — 200 — 20.2 KiB — 7 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 — 14 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 — 15 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 — 10 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 — 66 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 — 7 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 — 13 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 — 14 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 — 5 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 — 5 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 — 5 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 — 2 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 — 3 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 60ms · 20KB · $0/mo
www.schneier.com
Other
Optional
Execution 60ms
Transfer 20 KB
Monthly Cost $0/mo

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

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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