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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
76
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
65
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
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.
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.

2.98 s

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

5.29 s

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

410 ms

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

0.037

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

2.98 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.

12.83 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
8 PASS 2 REVIEW 5 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 (1.6 MiB of 1.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2241ms total JS execution
FIX
2241ms total JS execution
Warning::
https://www.joelonsoftware.com/: 624ms CPU time
Warning::
Unattributable: 610ms CPU time
Info::
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/bloc...: 165ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-ES3L...: 157ms CPU time
Info::
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/comp...: 156ms CPU time
Warning::
Third-party scripts: 2241ms (100% of total)

Main Thread Breakdown

Script Evaluation 36% Other 22% Style & Layout 17% Script Parsing & Compilation 15% Parse HTML & CSS 4% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
https://www.joelonsoftware.com/624ms20ms5ms3rd
Unattributable610ms54ms0ms3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/block-editor.min.js165ms86ms79ms3rd
https://www.googletagmanager.com/gtag/js?id=G-ES3L5VPF92&cx=c&_slc=1157ms122ms34ms3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/components.min.js156ms79ms78ms3rd
https://platform.twitter.com/widgets.js139ms120ms6ms3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/date.min.js95ms32ms63ms3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery.min.js95ms74ms7ms3rd
https://www.joelonsoftware.com/wp-content/plugins/blockprotocol/build/render.js?ver=d02daa73f930ea4bd87375ms53ms22ms3rd
https://www.google-analytics.com/analytics.js71ms61ms6ms3rd

Showing top 10 of 11 scripts

F
JS Bundles
Action
54 scripts, 600 KB unused
FIX
54 scripts, 600 KB unused
Warning::
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/bloc...: 212 KB unused (83%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/comp...: 193 KB unused (80%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-ES3L...: 71 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.joelonsoftware.com/wp-content/plugins/...: 52 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/vend...: 36 KB unused (87%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 600 KB
600 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/block-editor.min.js258 KB212 KB (83%)✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/components.min.js240 KB193 KB (80%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-ES3L5VPF92&cx=c&_slc=1163 KB71 KB (44%)✓3rd
https://www.joelonsoftware.com/wp-content/plugins/blockprotocol/build/render.js?ver=d02daa73f930ea4bd87387 KB52 KB (63%)✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/vendor/react-dom.min.js42 KB36 KB (87%)✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/blocks.min.js54 KB36 KB (67%)✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/keycodes.min.js2 KB—✓3rd
https://c0.wp.com/c/6.9.4/wp-includes/js/dist/private-apis.min.js1 KB—✓3rd
https://www.joelonsoftware.com/wp-content/themes/editor-redux/js/editor.js?ver=201612022 KB—✓3rd
https://www.joelonsoftware.com/wp-content/plugins/jetpack/_inc/build/twitter-timeline.min.js?ver=4.0.01 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
Page Weight Inventory
Action
82 resources · 1.6 MB · 600 KB savings available
FIX
82 resources · 1.6 MB · 600 KB savings available
Warning::
Page weight 576 KB over 1MB target
Got: 1.6 MB Expected: ≤ 1 MB
Info::
~600 KB of savings available
Warning::
81 third-party resources (100% of weight)
Info::
2 resources over 200KB
82 resources · 1.6 MiB · 81 third-party 576.5 KiB over 1MB target
JavaScript 70% · 1.1 MiB
Font 12% · 184.7 KiB
Image 9% · 150.5 KiB
Document 8% · 123.7 KiB
CSS 1% · 18.2 KiB
Other 0% · 2.6 KiB

~600.3 KiB of savings available

Remove unused JavaScript: 600.3 KiB
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
Page Weight Budget
Action
1.6 MB transferred, 82 requests
REVIEW
1.6 MB transferred, 82 requests
Info::
Page weighs 4.8 MB (1.6 MB transferred)
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
82 HTTP requests
Info::
Estimated 0.33 g CO2 per page load
1.6 MB / 2.4 MB budget
1.6 MB transferred
82 requests
0.33 g CO2 per page load
JavaScript 1.1 MiB 70%
Fonts 184.7 KiB 12%
Images 148.9 KiB 9%
HTML 123.0 KiB 8%
CSS 18.2 KiB 1%
Other 2.6 KiB 0%
Other 1.8 KiB 0%
Other 470 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

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

Green Hosting

No green hosting detected

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
Warning::
https://i0.wp.com/www.joelonsoftware.com/wp-conten... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
8 images 149 KB
0 oversized -0 KB
2 legacy format
1 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

A+
Font Loading
6 fonts (185 KB)
PASS
6 fonts (185 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

185 KB total

Render-blocking

0

of 6

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 4.0 s 5.0 s FCP 3.0 s LCP 5.3 shttps://fonts.gstatic.com/s/sourcesanspro/v23/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7lujVj9w.woff26xK3dSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7lujVj9w.woff2 — 14.5 KiB — 34 ms — font-display: swaphttps://www.joelonsoftware.com/wp-content/themes/editor-redux/inc/fontawesome/fontawesome-webfont.woff?v=4.1.0fontawesome-webfont.woff https://www.joelonsoftware.com/wp-content/themes/editor-redux/inc/fontawesome/fontawesome-webfont.woff?v=4.1.0 — 82.3 KiB — 8 ms — font-display: swaphttps://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2ieVl2ZhZI2eCN5jzbjEETS9... https://fonts.gstatic.com/s/robotocondensed/v31/ieVl2ZhZI2eCN5jzbjEETS9weq8-19K7DQk6YvM.woff2 — 45.0 KiB — 73 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdu3cOWxw.woff26xKydSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3ig4vwlxdu3cOWxw.woff2 — 14.4 KiB — 41 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesanspro/v23/6xK1dSBYKcSV-LCoeQqfX1RYOo3qPZ7nsDJB9cme.woff26xK1dSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xK1dSBYKcSV-LCoeQqfX1RYOo3qPZ7nsDJB9cme.woff2 — 13.9 KiB — 49 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdu3cOWxw.woff26xKydSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xKydSBYKcSV-LCoeQqfX1RYOo3i54rwlxdu3cOWxw.woff2 — 14.6 KiB — 29 ms — font-display: swap
6xK3dSBYKcSV-LCoeQqfX1R... woff2 swap
Size 15 KB
Load time 34 ms
Start 274 ms
Risk FOUT — text flashes from fallback to web font
fontawesome-webfont.woff woff swap
Size 82 KB
Load time 8 ms
Start 274 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
ieVl2ZhZI2eCN5jzbjEETS9... woff2 swap
Size 45 KB
Load time 73 ms
Start 274 ms
Risk FOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R... woff2 swap
Size 14 KB
Load time 41 ms
Start 274 ms
Risk FOUT — text flashes from fallback to web font
6xK1dSBYKcSV-LCoeQqfX1R... woff2 swap
Size 14 KB
Load time 49 ms
Start 275 ms
Risk FOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R... woff2 swap
Size 15 KB
Load time 29 ms
Start 1.2 s
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)

Fixing the unchecked items could save ~25 KB and ~50 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
5 hints, 0 missing preconnects
PASS
5 hints, 0 missing preconnects
Info::
Page uses 5 resource hint(s)

Current Resource Hints

preconnect
2
preload
—
dns-prefetch
3
prefetch
—

5 resource hints configured

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
82 requests over 2177ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 3.0 s LCP 5.3 shttps://joelonsoftware.com// https://joelonsoftware.com/ — 301 — 211 B — 35 ms — h2https://www.joelonsoftware.com/www.joelonsoftware.com/ https://www.joelonsoftware.com/ — 200 — 19.2 KiB — 15 ms — h2https://www.joelonsoftware.com/wp-content/plugins/cloudflare-stream/dist/blocks.style.build.css?ver=1671234854www.joelonsoftware.com/wp-content/p... https://www.joelonsoftware.com/wp-content/plugins/cloudflare-stream/dist/blocks.style.build.css?ver=1671234854 — 200 — 744 B — 5 ms — h2https://www.joelonsoftware.com/wp-content/themes/editor-redux/style.css?ver=6.9.4www.joelonsoftware.com/wp-content/t... https://www.joelonsoftware.com/wp-content/themes/editor-redux/style.css?ver=6.9.4 — 200 — 10.5 KiB — 12 ms — h2https://www.joelonsoftware.com/wp-content/themes/editor-redux/inc/fontawesome/font-awesome.css?ver=4.1.0www.joelonsoftware.com/wp-content/t... https://www.joelonsoftware.com/wp-content/themes/editor-redux/inc/fontawesome/font-awesome.css?ver=4.1.0 — 200 — 5.2 KiB — 12 ms — h2https://fonts.googleapis.com/css?family=Source%20Sans%20Pro%3A400%2C600%2C700%2C400italic%2C600italic%2C700italic%7CRoboto%20Condensed%3A300%2C400%2C700%2C300italic%2C400italic%2C700italic&subset=latin%2Clatin-extfonts.googleapis.com/css?family=Sou... https://fonts.googleapis.com/css?family=Source%20Sans%20Pro%3A400%2C600%2C700%2C400italic%2C600italic%2C700italic%7CRoboto%20Condensed%3A300%2C400%2C700%2C300italic%2C400italic%2C700italic&subset=latin%2Clatin-ext — 200 — 1.8 KiB — 103 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery.min.jsc0.wp.com/c/6.9.4/wp-includes/js/jq... https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery.min.js — 200 — 31.1 KiB — 26 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery-migrate.min.jsc0.wp.com/c/6.9.4/wp-includes/js/jq... https://c0.wp.com/c/6.9.4/wp-includes/js/jquery/jquery-migrate.min.js — 200 — 5.3 KiB — 25 ms — h2https://i0.wp.com/www.joelonsoftware.com/wp-content/uploads/2016/12/Pong.png?w=730&ssl=1i0.wp.com/www.joelonsoftware.com/wp... https://i0.wp.com/www.joelonsoftware.com/wp-content/uploads/2016/12/Pong.png?w=730&ssl=1 — 200 — 111.5 KiB — 32 ms — h2https://i0.wp.com/www.joelonsoftware.com/wp-content/uploads/2016/12/newdesign-books.png?w=730&ssl=1i0.wp.com/www.joelonsoftware.com/wp... https://i0.wp.com/www.joelonsoftware.com/wp-content/uploads/2016/12/newdesign-books.png?w=730&ssl=1 — 200 — 6.3 KiB — 28 ms — h2https://i0.wp.com/www.joelonsoftware.com/wp-content/uploads/2016/12/jobs.jpg?w=730&ssl=1i0.wp.com/www.joelonsoftware.com/wp... https://i0.wp.com/www.joelonsoftware.com/wp-content/uploads/2016/12/jobs.jpg?w=730&ssl=1 — 200 — 8.4 KiB — 3 ms — h2https://i0.wp.com/www.joelonsoftware.com/wp-content/uploads/2016/12/so-logo.png?w=730&ssl=1i0.wp.com/www.joelonsoftware.com/wp... https://i0.wp.com/www.joelonsoftware.com/wp-content/uploads/2016/12/so-logo.png?w=730&ssl=1 — 200 — 11.5 KiB — 2 ms — h2https://i0.wp.com/stackexchange.com/users/flair/4.png?resize=208%2C58&ssl=1i0.wp.com/stackexchange.com/users/f... https://i0.wp.com/stackexchange.com/users/flair/4.png?resize=208%2C58&ssl=1 — 200 — 7.1 KiB — 2 ms — h2https://www.joelonsoftware.com/wp-content/themes/editor-redux/js/jquery.fitvids.js?ver=20140820www.joelonsoftware.com/wp-content/t... https://www.joelonsoftware.com/wp-content/themes/editor-redux/js/jquery.fitvids.js?ver=20140820 — 200 — 1.6 KiB — 3 ms — h3https://www.joelonsoftware.com/wp-content/themes/editor-redux/js/editor.js?ver=20161202www.joelonsoftware.com/wp-content/t... https://www.joelonsoftware.com/wp-content/themes/editor-redux/js/editor.js?ver=20161202 — 200 — 1.8 KiB — 9 ms — h2https://www.joelonsoftware.com/wp-content/plugins/jetpack/_inc/build/twitter-timeline.min.js?ver=4.0.0www.joelonsoftware.com/wp-content/p... https://www.joelonsoftware.com/wp-content/plugins/jetpack/_inc/build/twitter-timeline.min.js?ver=4.0.0 — 200 — 638 B — 8 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/vendor/react.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/react.min.js — 200 — 4.5 KiB — 3 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/vendor/react-dom.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/react-dom.min.js — 200 — 41.7 KiB — 6 ms — h2https://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 — 3 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 — 2 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 — 2 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/api-fetch.min.jsc0.wp.com/c/6.9.4/wp-includes/js/di... https://c0.wp.com/c/6.9.4/wp-includes/js/dist/api-fetch.min.js — 200 — 2.8 KiB — 3 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/vendor/react-jsx-runtime.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/react-jsx-runtime.min.js — 200 — 969 B — 2 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/dom-ready.min.jsc0.wp.com/c/6.9.4/wp-includes/js/di... https://c0.wp.com/c/6.9.4/wp-includes/js/dist/dom-ready.min.js — 200 — 821 B — 3 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/a11y.min.jsc0.wp.com/c/6.9.4/wp-includes/js/di... https://c0.wp.com/c/6.9.4/wp-includes/js/dist/a11y.min.js — 200 — 1.2 KiB — 2 ms — h2https://c0.wp.com/c/6.9.4/wp-includes/js/dist/blob.min.jsc0.wp.com/c/6.9.4/wp-includes/js/di... 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https://platform.twitter.com/widgets/widget_iframe.2f70fb173b9000da126c79afe2098f02.html?origin=https%3A%2F%2Fwww.joelonsoftware.com — 200 — 103.4 KiB — 127 ms — h2https://www.joelonsoftware.com/wp-includes/js/wp-emoji-release.min.js?ver=6.9.4www.joelonsoftware.com/wp-includes/... https://www.joelonsoftware.com/wp-includes/js/wp-emoji-release.min.js?ver=6.9.4 — 200 — 5.6 KiB — 8 ms — h2https://www.googletagmanager.com/gtag/js?id=G-ES3L5VPF92&cx=c&_slc=1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-ES3L5VPF92&cx=c&_slc=1 — 200 — 163.1 KiB — 199 ms — h2https://syndication.twitter.com/settings?session_id=3e6f6013cfc8c304b934bd144a41133adf054798syndication.twitter.com/settings?se... https://syndication.twitter.com/settings?session_id=3e6f6013cfc8c304b934bd144a41133adf054798 — 200 — 948 B — 204 ms — h2https://www.joelonsoftware.com/wp-admin/admin-ajax.php?action=rest-noncewww.joelonsoftware.com/wp-admin/adm... 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https://region1.google-analytics.com/g/collect?v=2&tid=G-ES3L5VPF92&gtm=45je64k0v9125368111za20g&_p=1776897339040&gcd=13l3l3l2l2l1&npa=0&dma_cps=a&dma=1&_eu=ABAI&are=1&cid=1014595235.1776897339&frm=0&pscdl=noapi&rcb=12&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117512543&dl=https%3A%2F%2Fwww.joelonsoftware.com%2F&dt=Joel%20on%20Software&sid=1776897339&sct=1&seg=0&_tu=wAQ&en=page_view&_fv=1&_ss=1&_ee=1&tfd=844 — 204 — 554 B — 86 ms — h2https://platform.twitter.com/js/timeline.e108540dddc96e4b707f5cf259a582d7.jsplatform.twitter.com/js/timeline.e1... https://platform.twitter.com/js/timeline.e108540dddc96e4b707f5cf259a582d7.js — 200 — 3.1 KiB — 30 ms — 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— 429 — 480 B — 132 ms — h2https://secure.gaug.es/track.gif?h[site_id]=57a9715ec88d90063f018386&h[resource]=https%3A%2F%2Fwww.joelonsoftware.com%2F&h[referrer]=&h[title]=Joel%20on%20Software&h[user_agent]=Mozilla%2F5.0%20(Linux%3B%20Android%2011%3B%20moto%20g%20power%20(2022))%20AppleWebKit%2F537.36%20(KHTML%2C%20like%20Gecko)%20Chrome%2F147.0.0.0%20Mobile%20Safari%2F537.36&h[unique]=1&h[unique_hour]=1&h[unique_day]=1&h[unique_month]=1&h[unique_year]=1&h[screenx]=412&h[browserx]=412&h[browsery]=823&timestamp=1776897339484secure.gaug.es/track.gif?h[site_id]... 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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 2241ms · 942KB · $30/mo
www.joelonsoftware.com
Other
Costly
Execution 624ms
Transfer 19 KB
Monthly Cost $8/mo
Unattributable
Other
Costly
Execution 610ms
Transfer 0 KB
Monthly Cost $8/mo
c0.wp.com
Other
Optional
Execution 165ms
Transfer 258 KB
Unused 83%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 157ms
Transfer 163 KB
Unused 44%
Monthly Cost $2/mo
c0.wp.com
Other
Optional
Execution 156ms
Transfer 240 KB
Unused 80%
Monthly Cost $2/mo
Twitter/X Embed
Social
Optional
Execution 139ms
Transfer 27 KB
Monthly Cost $2/mo
c0.wp.com
Other
Optional
Execution 95ms
Transfer 41 KB
Monthly Cost $1/mo
c0.wp.com
Other
Optional
Execution 95ms
Transfer 31 KB
Monthly Cost $1/mo
www.joelonsoftware.com
Other
Optional
Execution 75ms
Transfer 87 KB
Unused 63%
Monthly Cost $1/mo
Google Analytics
Analytics
Optional
Execution 71ms
Transfer 21 KB
Monthly Cost $1/mo
c0.wp.com
Other
Optional
Execution 53ms
Transfer 54 KB
Unused 67%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.joelonsoftware.com adds 624ms and costs ~$8/month
  • Unattributable adds 610ms and costs ~$8/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.joelonsoftware.com takes 624ms 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 610ms 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

83% of c0.wp.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

80% of c0.wp.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

63% of www.joelonsoftware.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

67% of c0.wp.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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