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https://dreamwidth.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
2
REVIEW
4
PASS
9
INFO
2

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

Mobile Desktop
64
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
85
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.

5.16 s

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

5.66 s

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

164 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.

5.32 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.

6.49 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
9 PASS 4 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 (516.7 KiB of 516.9 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.

B
Image Optimization
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Warning::
https://www.dreamwidth.org/img/tropo-red/dw_logo.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
14 images 13 KB
0 oversized -0 KB
13 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

B
JS Execution Cost
917ms total JS execution
REVIEW
917ms total JS execution
Warning::
https://www.googletagmanager.com/gtag/js?id=G-4FH9...: 296ms CPU time
Warning::
https://www.dreamwidth.org/js/??jquery/jquery-1.8....: 288ms CPU time
Info::
Unattributable: 158ms CPU time
Info::
https://www.dreamwidth.org/: 125ms CPU time
Info::
https://ssl.google-analytics.com/ga.js: 51ms CPU time
Warning::
Third-party scripts: 917ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Other 20% Style & Layout 18% Script Parsing & Compilation 9% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.googletagmanager.com/gtag/js?id=G-4FH9Y1TDGT296ms236ms58ms3rd
https://www.dreamwidth.org/js/??jquery/jquery-1.8.3.js,foundation/vendor/custom.modernizr.js,foundation/foundation/foundation.js,foundation/foundation/foundation.topbar.js,dw/dw-core.js,jquery/jquery.ui.core.js,jquery/jquery.ui.widget.js,jquery/jquery.ui.tooltip.js,jquery.ajaxtip.js,jquery/jquery.ui.position.js,jquery.hoverIntent.js,jquery.contextualhover.js?v=1773454536288ms85ms18ms3rd
Unattributable158ms6ms0ms3rd
https://www.dreamwidth.org/125ms63ms4ms3rd
https://ssl.google-analytics.com/ga.js51ms42ms6ms3rd
B
JS Bundles
4 scripts, 141 KB unused
REVIEW
4 scripts, 141 KB unused
Warning::
https://www.dreamwidth.org/js/??jquery/jquery-1.8....: 77 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-4FH9...: 64 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 141 KB
141 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.dreamwidth.org/js/??jquery/jquery-1.8.3.js,foundation/vendor/custom.modernizr.js,foundation/foundation/foundation.js,foundation/foundation/foundation.topbar.js,dw/dw-core.js,jquery/jquery.ui.core.js,jquery/jquery.ui.widget.js,jquery/jquery.ui.tooltip.js,jquery.ajaxtip.js,jquery/jquery.ui.position.js,jquery.hoverIntent.js,jquery.contextualhover.js?v=1773454536150 KB77 KB (52%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-4FH9Y1TDGT152 KB64 KB (42%)✓3rd
https://www.dreamwidth.org/js/??tropo/homepage.js,foundation/foundation/foundation.reveal.js,skins/jquery.focus-on-reveal.js?v=17734545369 KB—✓3rd
https://ssl.google-analytics.com/ga.js17 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

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

Green Hosting

No green hosting detected

A+
Page Weight Budget
517 KB transferred, 24 requests
PASS
517 KB transferred, 24 requests
Info::
Page weighs 825 KB (517 KB transferred)
Info::
24 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
517 KB / 2.4 MB budget
517 KB transferred
24 requests
0.11 g CO2 per page load
JavaScript 327.8 KiB 63%
CSS 155.5 KiB 30%
HTML 14.4 KiB 3%
Images 12.8 KiB 2%
Other 5.9 KiB 1%
Other 552 B 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+
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
24 resources · 517 KB · 141 KB savings available
PASS
24 resources · 517 KB · 141 KB savings available
Info::
Within 1MB page-weight target
Got: 517 KB
Info::
~141 KB of savings available
Warning::
23 third-party resources (100% of weight)
24 resources · 516.9 KiB · 23 third-party Within 1MB page-weight target
JavaScript 63% · 327.8 KiB
CSS 30% · 155.5 KiB
Image 4% · 18.5 KiB
Document 3% · 14.4 KiB
Other 0% · 701 B

~141.0 KiB of savings available

Remove unused JavaScript: 141.0 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
24 requests over 2235ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 5.2 s LCP 5.7 shttps://dreamwidth.org// https://dreamwidth.org/ — 303 — 149 B — 1.4 s — h2https://www.dreamwidth.org/www.dreamwidth.org/ https://www.dreamwidth.org/ — 200 — 14.4 KiB — 564 ms — h3https://www.dreamwidth.org/stc/??lj_base.css,esn.css,jquery/jquery.ui.core.css,jquery/jquery.ui.tooltip.css,jquery.contextualhover.css,css/skins/tropo/tropo-red.css?v=1773517506www.dreamwidth.org/stc/??lj_base.cs... https://www.dreamwidth.org/stc/??lj_base.css,esn.css,jquery/jquery.ui.core.css,jquery/jquery.ui.tooltip.css,jquery.contextualhover.css,css/skins/tropo/tropo-red.css?v=1773517506 — 200 — 150.4 KiB — 22 ms — h3https://www.dreamwidth.org/stc/??tropo/homepage.css,css/components/foundation-icons.css,canary.css?v=1773517503www.dreamwidth.org/stc/??tropo/home... https://www.dreamwidth.org/stc/??tropo/homepage.css,css/components/foundation-icons.css,canary.css?v=1773517503 — 200 — 5.1 KiB — 14 ms — h3https://www.dreamwidth.org/img/tropo-red/dw_logo.pngwww.dreamwidth.org/img/tropo-red/dw... https://www.dreamwidth.org/img/tropo-red/dw_logo.png — 200 — 2.8 KiB — 7 ms — h3https://www.dreamwidth.org/js/??jquery/jquery-1.8.3.js,foundation/vendor/custom.modernizr.js,foundation/foundation/foundation.js,foundation/foundation/foundation.topbar.js,dw/dw-core.js,jquery/jquery.ui.core.js,jquery/jquery.ui.widget.js,jquery/jquery.ui.tooltip.js,jquery.ajaxtip.js,jquery/jquery.ui.position.js,jquery.hoverIntent.js,jquery.contextualhover.js?v=1773454536www.dreamwidth.org/js/??jquery/jque... https://www.dreamwidth.org/js/??jquery/jquery-1.8.3.js,foundation/vendor/custom.modernizr.js,foundation/foundation/foundation.js,foundation/foundation/foundation.topbar.js,dw/dw-core.js,jquery/jquery.ui.core.js,jquery/jquery.ui.widget.js,jquery/jquery.ui.tooltip.js,jquery.ajaxtip.js,jquery/jquery.ui.position.js,jquery.hoverIntent.js,jquery.contextualhover.js?v=1773454536 — 200 — 149.5 KiB — 17 ms — h3https://www.dreamwidth.org/js/??tropo/homepage.js,foundation/foundation/foundation.reveal.js,skins/jquery.focus-on-reveal.js?v=1773454536www.dreamwidth.org/js/??tropo/homep... https://www.dreamwidth.org/js/??tropo/homepage.js,foundation/foundation/foundation.reveal.js,skins/jquery.focus-on-reveal.js?v=1773454536 — 200 — 9.2 KiB — 10 ms — h3https://www.googletagmanager.com/gtag/js?id=G-4FH9Y1TDGTwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-4FH9Y1TDGT — 200 — 151.6 KiB — 70 ms — h2https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-topleft.pngwww.dreamwidth.org/img/tropo-red/ho... https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-topleft.png — 200 — 595 B — 16 ms — h3https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-topright.pngwww.dreamwidth.org/img/tropo-red/ho... https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-topright.png — 200 — 1.2 KiB — 24 ms — h3https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-bottomleft.pngwww.dreamwidth.org/img/tropo-red/ho... https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-bottomleft.png — 200 — 1.5 KiB — 9 ms — h3https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-bottomright.pngwww.dreamwidth.org/img/tropo-red/ho... https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-bottomright.png — 200 — 2.6 KiB — 22 ms — h3https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-top.pngwww.dreamwidth.org/img/tropo-red/ho... https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-top.png — 200 — 525 B — 23 ms — h3https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-left.pngwww.dreamwidth.org/img/tropo-red/ho... https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-left.png — 200 — 519 B — 22 ms — h3https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-right.pngwww.dreamwidth.org/img/tropo-red/ho... https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-right.png — 200 — 518 B — 23 ms — h3https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-bottom.pngwww.dreamwidth.org/img/tropo-red/ho... https://www.dreamwidth.org/img/tropo-red/homepage/intro-box-bottom.png — 200 — 514 B — 22 ms — h3https://www.dreamwidth.org/img/tropo-red/bg_menu_gradient.pngwww.dreamwidth.org/img/tropo-red/bg... https://www.dreamwidth.org/img/tropo-red/bg_menu_gradient.png — 200 — 443 B — 21 ms — h3https://www.dreamwidth.org/img/tropo-red/icon_menu_swirl.pngwww.dreamwidth.org/img/tropo-red/ic... https://www.dreamwidth.org/img/tropo-red/icon_menu_swirl.png — 200 — 809 B — 22 ms — h3data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZlcnNpb249IjEuMSIge…data:image/svg+xml;base64,PHN2ZyB4b... data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZlcnNpb249IjEuMSIge… — 200 — 0 B — 0 ms — datahttps://www.dreamwidth.org/img/tropo-red/bg_footer_gradient.pngwww.dreamwidth.org/img/tropo-red/bg... https://www.dreamwidth.org/img/tropo-red/bg_footer_gradient.png — 200 — 427 B — 18 ms — h3https://ssl.google-analytics.com/ga.jsssl.google-analytics.com/ga.js https://ssl.google-analytics.com/ga.js — 200 — 17.4 KiB — 26 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-4FH9Y1TDGT&gtm=45je64k1v867846408za200zd867846408&_p=1776902432436&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1452662217.1776902433&frm=0&pscdl=noapi&rcb=1&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938465~115938468~117266401~117384406~117512542~118463261&sid=1776902432&sct=1&seg=0&dl=https%3A%2F%2Fwww.dreamwidth.org%2F&dt=Dreamwidth%20Studios&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=2162www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-4FH9Y1TDGT&gtm=45je64k1v867846408za200zd867846408&_p=1776902432436&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1452662217.1776902433&frm=0&pscdl=noapi&rcb=1&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938465~115938468~117266401~117384406~117512542~118463261&sid=1776902432&sct=1&seg=0&dl=https%3A%2F%2Fwww.dreamwidth.org%2F&dt=Dreamwidth%20Studios&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&tfd=2162 — 204 — 552 B — 34 ms — h2https://ssl.google-analytics.com/r/__utm.gif?utmwv=5.7.2&utms=1&utmn=1879691318&utmhn=www.dreamwidth.org&utmcs=UTF-8&utmsr=412x823&utmvp=412x823&utmsc=24-bit&utmul=en-us&utmje=0&utmfl=-&utmdt=Dreamwidth%20Studios&utmhid=1433544169&utmr=-&utmp=%2F&utmht=1776902432632&utmac=UA-4595135-1&utmcc=__utma%3D131302874.1452662217.1776902433.1776902433.1776902433.1%3B%2B__utmz%3D131302874.1776902433.1.1.utmcsr%3D(direct)%7Cutmccn%3D(direct)%7Cutmcmd%3D(none)%3B&utmjid=520385521&utmredir=1&utmu=qAAAAAAAAAAAAAAAAAABAAAE~ssl.google-analytics.com/r/__utm.gi... https://ssl.google-analytics.com/r/__utm.gif?utmwv=5.7.2&utms=1&utmn=1879691318&utmhn=www.dreamwidth.org&utmcs=UTF-8&utmsr=412x823&utmvp=412x823&utmsc=24-bit&utmul=en-us&utmje=0&utmfl=-&utmdt=Dreamwidth%20Studios&utmhid=1433544169&utmr=-&utmp=%2F&utmht=1776902432632&utmac=UA-4595135-1&utmcc=__utma%3D131302874.1452662217.1776902433.1776902433.1776902433.1%3B%2B__utmz%3D131302874.1776902433.1.1.utmcsr%3D(direct)%7Cutmccn%3D(direct)%7Cutmcmd%3D(none)%3B&utmjid=520385521&utmredir=1&utmu=qAAAAAAAAAAAAAAAAAABAAAE~ — 200 — 440 B — 19 ms — h2https://www.dreamwidth.org/favicon.icowww.dreamwidth.org/favicon.ico https://www.dreamwidth.org/favicon.ico — 200 — 5.7 KiB — 31 ms — h3
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 917ms · 333KB · €10/mo
Google Tag Manager
Tag Manager
Costly
Execution 296ms
Transfer 152 KB
Unused 42%
Monthly Cost €3/mo
www.dreamwidth.org
Other
Costly
Execution 288ms
Transfer 150 KB
Unused 52%
Monthly Cost €3/mo
Unattributable
Other
Optional
Execution 158ms
Transfer 0 KB
Monthly Cost €2/mo
www.dreamwidth.org
Other
Optional
Execution 125ms
Transfer 14 KB
Monthly Cost €1/mo
Google Analytics
Analytics
Optional
Execution 51ms
Transfer 17 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Google Tag Manager adds 296ms and costs ~€3/month
  • www.dreamwidth.org adds 288ms and costs ~€3/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

Google Tag Manager takes 296ms 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

www.dreamwidth.org takes 288ms 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

52% of www.dreamwidth.org'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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