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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
2
REVIEW
1
PASS
10
INFO
2

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
76
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

684 ms

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

705 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.

0.011

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

999 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.

707 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
10 PASS 1 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 (166.4 KiB of 166.6 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
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Warning::
https://www.openoffice.org/images/AOO_logos/100Mil... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.openoffice.org/images/logo-facebook-16... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.openoffice.org/images/logo-twitter-16.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.openoffice.org/images/logo-rss-16.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.openoffice.org/images/logo-youtube-16.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
14 images 70 KB
0 oversized -0 KB
13 legacy format
5 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

A+
Page Weight Budget
167 KB transferred, 26 requests
PASS
167 KB transferred, 26 requests
Info::
Page weighs 304 KB (167 KB transferred)
Info::
26 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
167 KB / 2.4 MB budget
167 KB transferred
26 requests
0.03 g CO2 per page load
Images 70.1 KiB 42%
Other 32.6 KiB 20%
CSS 28.4 KiB 17%
JavaScript 25.5 KiB 15%
HTML 10.1 KiB 6%
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
59ms total JS execution
PASS
59ms total JS execution
Info::
https://www.openoffice.org/: 59ms CPU time
Warning::
Third-party scripts: 59ms (100% of total)

Main Thread Breakdown

Other 46% Style & Layout 30% Rendering 8% Script Evaluation 6% Parse HTML & CSS 5% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.openoffice.org/59ms4ms1ms3rd
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
5 scripts, 0 KB unused
PASS
5 scripts, 0 KB unused
Warning::
https://www.openoffice.org/download/download.js: unminified — 5 KB could be saved
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.openoffice.org/download/globalvars.js4 KB—✓3rd
https://www.apachecon.com/event-images/snippet.js0 KB—✓3rd
https://www.openoffice.org/msg_prop_l10n.js5 KB—✓3rd
https://www.openoffice.org/download/languages.js4 KB—✓3rd
https://www.openoffice.org/download/download.js13 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
26 resources · 167 KB · 0 KB savings available
PASS
26 resources · 167 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 167 KB
Warning::
25 third-party resources (100% of weight)
26 resources · 166.6 KiB · 25 third-party Within 1MB page-weight target
Image 61% · 102.5 KiB
CSS 17% · 28.4 KiB
JavaScript 15% · 25.5 KiB
Document 6% · 10.3 KiB
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Hetzner Online GmbH

Network Waterfall
26 requests over 1456ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 684 ms LCP 705 mshttps://openoffice.org// https://openoffice.org/ — 302 — 237 B — 330 ms — http/1.1https://www.openoffice.org/www.openoffice.org/ https://www.openoffice.org/ — 200 — 10.1 KiB — 310 ms — http/1.1https://www.openoffice.org/css/ooo.csswww.openoffice.org/css/ooo.css https://www.openoffice.org/css/ooo.css — 200 — 3.4 KiB — 101 ms — http/1.1https://www.openoffice.org/download/globalvars.jswww.openoffice.org/download/globalv... https://www.openoffice.org/download/globalvars.js — 200 — 4.4 KiB — 298 ms — http/1.1https://www.apachecon.com/event-images/snippet.jswww.apachecon.com/event-images/snip... https://www.apachecon.com/event-images/snippet.js — -1 — 0 B — 79 ms — https://www.openoffice.org/msg_prop_l10n.jswww.openoffice.org/msg_prop_l10n.js https://www.openoffice.org/msg_prop_l10n.js — 200 — 4.6 KiB — 300 ms — http/1.1https://www.openoffice.org/download/languages.jswww.openoffice.org/download/languag... https://www.openoffice.org/download/languages.js — 200 — 3.8 KiB — 307 ms — http/1.1https://www.openoffice.org/download/download.jswww.openoffice.org/download/downloa... https://www.openoffice.org/download/download.js — 200 — 12.7 KiB — 307 ms — http/1.1https://www.openoffice.org/css/home.csswww.openoffice.org/css/home.css https://www.openoffice.org/css/home.css — 200 — 2.8 KiB — 197 ms — http/1.1https://www.openoffice.org/css/styles.csswww.openoffice.org/css/styles.css https://www.openoffice.org/css/styles.css — 200 — 18.9 KiB — 389 ms — http/1.1https://www.openoffice.org/css/exceptions.csswww.openoffice.org/css/exceptions.c... https://www.openoffice.org/css/exceptions.css — 200 — 3.3 KiB — 289 ms — http/1.1https://www.openoffice.org/images/AOO_logos/100MillAOO100px.pngwww.openoffice.org/images/AOO_logos... https://www.openoffice.org/images/AOO_logos/100MillAOO100px.png — 200 — 32.6 KiB — 195 ms — http/1.1https://www.openoffice.org/images/logo-rss-16.pngwww.openoffice.org/images/logo-rss-... https://www.openoffice.org/images/logo-rss-16.png — 200 — 1.7 KiB — 98 ms — http/1.1https://www.openoffice.org/images/logo-facebook-16.pngwww.openoffice.org/images/logo-face... https://www.openoffice.org/images/logo-facebook-16.png — 200 — 1.5 KiB — 104 ms — http/1.1https://www.openoffice.org/images/logo-twitter-16.pngwww.openoffice.org/images/logo-twit... https://www.openoffice.org/images/logo-twitter-16.png — 200 — 1.4 KiB — 104 ms — http/1.1https://www.openoffice.org/images/logo-youtube-16.pngwww.openoffice.org/images/logo-yout... https://www.openoffice.org/images/logo-youtube-16.png — 200 — 1.6 KiB — 104 ms — http/1.1https://www.openoffice.org/images/asf_logo_small.pngwww.openoffice.org/images/asf_logo_... https://www.openoffice.org/images/asf_logo_small.png — 200 — 6.2 KiB — 105 ms — http/1.1https://www.w3.org/Icons/valid-xhtml10-blue.pngwww.w3.org/Icons/valid-xhtml10-blue... https://www.w3.org/Icons/valid-xhtml10-blue.png — -1 — 0 B — 0 ms — https://www.openoffice.org/images/action-info.pngwww.openoffice.org/images/action-in... https://www.openoffice.org/images/action-info.png — 200 — 4.0 KiB — 99 ms — http/1.1https://www.openoffice.org/images/campaign-divider.pngwww.openoffice.org/images/campaign-... https://www.openoffice.org/images/campaign-divider.png — 200 — 1.4 KiB — 153 ms — http/1.1https://www.openoffice.org/images/action-social.pngwww.openoffice.org/images/action-so... https://www.openoffice.org/images/action-social.png — 200 — 4.9 KiB — 171 ms — http/1.1https://www.openoffice.org/images/action-download.pngwww.openoffice.org/images/action-do... https://www.openoffice.org/images/action-download.png — 200 — 3.3 KiB — 170 ms — http/1.1https://www.openoffice.org/images/action-extend.pngwww.openoffice.org/images/action-ex... https://www.openoffice.org/images/action-extend.png — 200 — 2.9 KiB — 170 ms — http/1.1https://www.openoffice.org/images/action-participate.pngwww.openoffice.org/images/action-pa... https://www.openoffice.org/images/action-participate.png — 200 — 3.8 KiB — 170 ms — http/1.1https://www.openoffice.org/images/action-help.pngwww.openoffice.org/images/action-he... https://www.openoffice.org/images/action-help.png — 200 — 4.7 KiB — 171 ms — http/1.1https://www.openoffice.org/favicon.icowww.openoffice.org/favicon.ico https://www.openoffice.org/favicon.ico — 200 — 32.4 KiB — 195 ms — http/1.1
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 59ms · 10KB · €1/mo
www.openoffice.org
Other
Optional
Execution 59ms
Transfer 10 KB
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

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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