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https://dreamwidth.org

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
2
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
97
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.
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.

916 ms

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

1.07 s

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.

0.000

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

916 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.

1.08 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
15
8 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 (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
15 images, 0 KB saveable
REVIEW
15 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.
15 images 13 KB
0 oversized -0 KB
14 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 Bundles
4 scripts, 138 KB unused
REVIEW
4 scripts, 138 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...: 62 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 138 KB
138 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-4FH9Y1TDGT151 KB62 KB (41%)✓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, 25 requests
PASS
517 KB transferred, 25 requests
Info::
Page weighs 824 KB (517 KB transferred)
Info::
25 HTTP requests
Info::
Estimated 0.11 g CO2 per page load
517 KB / 2.4 MB budget
517 KB transferred
25 requests
0.11 g CO2 per page load
JavaScript 327.2 KiB 63%
CSS 155.5 KiB 30%
HTML 14.4 KiB 3%
Images 13.3 KiB 3%
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+
JS Execution Cost
210ms total JS execution
PASS
210ms total JS execution
Info::
https://www.googletagmanager.com/gtag/js?id=G-4FH9...: 81ms CPU time
Info::
https://www.dreamwidth.org/: 76ms CPU time
Info::
https://www.dreamwidth.org/js/??jquery/jquery-1.8....: 53ms CPU time
Warning::
Third-party scripts: 210ms (100% of total)

Main Thread Breakdown

Script Evaluation 43% Style & Layout 22% Other 20% Script Parsing & Compilation 10% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.googletagmanager.com/gtag/js?id=G-4FH9Y1TDGT81ms66ms14ms3rd
https://www.dreamwidth.org/76ms14ms1ms3rd
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=177345453653ms22ms9ms3rd
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
25 resources · 517 KB · 138 KB savings available
PASS
25 resources · 517 KB · 138 KB savings available
Info::
Within 1MB page-weight target
Got: 517 KB
Info::
~138 KB of savings available
Warning::
24 third-party resources (100% of weight)
25 resources · 516.9 KiB · 24 third-party Within 1MB page-weight target
JavaScript 63% · 327.2 KiB
CSS 30% · 155.5 KiB
Image 4% · 19.1 KiB
Document 3% · 14.4 KiB
Other 0% · 701 B

~138.4 KiB of savings available

Remove unused JavaScript: 138.4 KiB
Network Waterfall
25 requests over 429ms
INFO
0 ms 500 ms 1.0 s FCP 916 ms LCP 1.1 shttps://dreamwidth.org// https://dreamwidth.org/ — 303 — 149 B — 36 ms — h2https://www.dreamwidth.org/www.dreamwidth.org/ https://www.dreamwidth.org/ — 200 — 14.4 KiB — 114 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 — 16 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 — 15 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 — 151.1 KiB — 87 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 — 593 B — 6 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 — 8 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 — 20 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 — 19 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 — 524 B — 19 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 — 19 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 — 515 B — 19 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 — 512 B — 19 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 — 27 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 — 17 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_menu_gradient.pngwww.dreamwidth.org/img/tropo-red/bg... https://www.dreamwidth.org/img/tropo-red/bg_menu_gradient.png — 200 — 444 B — 18 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 — 18 ms — h3https://www.dreamwidth.org/img/tropo-red/icon_menu_swirl_dropdown.pngwww.dreamwidth.org/img/tropo-red/ic... https://www.dreamwidth.org/img/tropo-red/icon_menu_swirl_dropdown.png — 200 — 584 B — 17 ms — h3https://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 — 425 B — 17 ms — h3https://ssl.google-analytics.com/ga.jsssl.google-analytics.com/ga.js https://ssl.google-analytics.com/ga.js — 200 — 17.4 KiB — 20 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-4FH9Y1TDGT&gtm=45je64m0h2v867846408za200zd867846408&_p=1776902445376&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=768350255.1776902446&frm=0&pscdl=noapi&rcb=11&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938465~115938468~117266401~117512543&sid=1776902445&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=356www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-4FH9Y1TDGT&gtm=45je64m0h2v867846408za200zd867846408&_p=1776902445376&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=768350255.1776902446&frm=0&pscdl=noapi&rcb=11&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938465~115938468~117266401~117512543&sid=1776902445&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=356 — 204 — 552 B — 56 ms — h2https://ssl.google-analytics.com/r/__utm.gif?utmwv=5.7.2&utms=1&utmn=1492828504&utmhn=www.dreamwidth.org&utmcs=UTF-8&utmsr=800x600&utmvp=1350x940&utmsc=24-bit&utmul=en-us&utmje=0&utmfl=-&utmdt=Dreamwidth%20Studios&utmhid=1613987827&utmr=-&utmp=%2F&utmht=1776902445616&utmac=UA-4595135-1&utmcc=__utma%3D131302874.768350255.1776902446.1776902446.1776902446.1%3B%2B__utmz%3D131302874.1776902446.1.1.utmcsr%3D(direct)%7Cutmccn%3D(direct)%7Cutmcmd%3D(none)%3B&utmjid=498345302&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=1492828504&utmhn=www.dreamwidth.org&utmcs=UTF-8&utmsr=800x600&utmvp=1350x940&utmsc=24-bit&utmul=en-us&utmje=0&utmfl=-&utmdt=Dreamwidth%20Studios&utmhid=1613987827&utmr=-&utmp=%2F&utmht=1776902445616&utmac=UA-4595135-1&utmcc=__utma%3D131302874.768350255.1776902446.1776902446.1776902446.1%3B%2B__utmz%3D131302874.1776902446.1.1.utmcsr%3D(direct)%7Cutmccn%3D(direct)%7Cutmcmd%3D(none)%3B&utmjid=498345302&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 — 24 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 210ms · 315KB · €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 81ms
Transfer 151 KB
Unused 41%
Monthly Cost €1/mo
www.dreamwidth.org
Other
Optional
Execution 76ms
Transfer 14 KB
Monthly Cost €1/mo
www.dreamwidth.org
Other
Optional
Execution 53ms
Transfer 150 KB
Unused 52%
Monthly Cost €1/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

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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