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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
83
GRADE
B
FIX
3
REVIEW
3
PASS
9
INFO
2

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

Mobile Desktop
66
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
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.
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.

2.32 s

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

2.94 s

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

440 ms

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

0.278

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

3.34 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.

7.45 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 3 REVIEW 3 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 (1.7 MiB of 1.7 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
48 resources · 1.7 MB · 31 KB savings available
FIX
48 resources · 1.7 MB · 31 KB savings available
Warning::
Page weight 682 KB over 1MB target
Got: 1.7 MB Expected: ≤ 1 MB
Warning::
47 third-party resources (100% of weight)
Info::
1 resources over 200KB
48 resources · 1.7 MiB · 47 third-party 681.8 KiB over 1MB target
Image 45% · 773.1 KiB
Font 42% · 723.7 KiB
JavaScript 6% · 105.6 KiB
Other 5% · 80.0 KiB
CSS 1% · 16.7 KiB
Document 0% · 6.7 KiB

~30.7 KiB of savings available

Remove unused JavaScript: 30.7 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
1.7 MB transferred, 48 requests
REVIEW
1.7 MB transferred, 48 requests
Info::
Page weighs 2.0 MB (1.7 MB transferred)
Info::
Fonts are 724 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 724 KB
Info::
48 HTTP requests
Info::
Estimated 0.35 g CO2 per page load
1.7 MB / 2.4 MB budget
1.7 MB transferred
48 requests
0.35 g CO2 per page load
Images 771.5 KiB 45%
Fonts 723.7 KiB 42%
JavaScript 105.6 KiB 6%
Other 79.6 KiB 5%
CSS 16.7 KiB 1%
HTML 6.6 KiB 0%
Other 1.7 KiB 0%
Other 402 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

C
Image Optimization
Action
28 images, 0 KB saveable
REVIEW
28 images, 0 KB saveable
Warning::
https://www.libreoffice.org/media/screenshot_write... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/libo-base.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/libo-impress.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/screenshot_impre... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/libo-draw.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/libo-math.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/screenshot_draw.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/screenshot_base.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/illustration3.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/screenshot_write... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/libo-calc.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/screenshot_math.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/illustration1.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/libreoffice-tdf-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/libo-writer.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/screenshot_calc.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.libreoffice.org/media/illustration2.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
28 images 771 KB
0 oversized -0 KB
26 legacy format
18 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

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

Performance issues directly impact user engagement and conversion rates.

C
JS Execution Cost
Action
1980ms total JS execution
REVIEW
1980ms total JS execution
Warning::
Unattributable: 959ms CPU time
Warning::
https://www.libreoffice.org/: 553ms CPU time
Warning::
https://www.libreoffice.org/js/leaflet.js: 256ms CPU time
Info::
https://www.libreoffice.org/js/community_map.js: 212ms CPU time
Warning::
Third-party scripts: 1980ms (100% of total)

Main Thread Breakdown

Other 35% Script Evaluation 33% Style & Layout 17% Rendering 10%
ScriptTotalScriptingParse/CompileParty
Unattributable959ms412ms0ms3rd
https://www.libreoffice.org/553ms14ms1ms3rd
https://www.libreoffice.org/js/leaflet.js256ms61ms14ms3rd
https://www.libreoffice.org/js/community_map.js212ms141ms4ms3rd
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
4 fonts (724 KB)
PASS
4 fonts (724 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

724 KB total

Render-blocking

0

of 4

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 FCP 2.3 s LCP 2.9 shttps://www.libreoffice.org/fonts/Lato-Regular.woff2Lato-Regular.woff2 https://www.libreoffice.org/fonts/Lato-Regular.woff2 — 179.3 KiB — 573 ms — font-display: swaphttps://www.libreoffice.org/fonts/Lato-Black.woff2Lato-Black.woff2 https://www.libreoffice.org/fonts/Lato-Black.woff2 — 173.4 KiB — 583 ms — font-display: swaphttps://www.libreoffice.org/fonts/Lato-Bold.woff2Lato-Bold.woff2 https://www.libreoffice.org/fonts/Lato-Bold.woff2 — 181.4 KiB — 586 ms — font-display: swaphttps://www.libreoffice.org/fonts/Lato-BoldItalic.woff2Lato-BoldItalic.woff2 https://www.libreoffice.org/fonts/Lato-BoldItalic.woff2 — 189.6 KiB — 727 ms — font-display: swap
Lato-Regular.woff2 woff2 swap
Size 179 KB
Load time 573 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Lato-Black.woff2 woff2 swap
Size 173 KB
Load time 583 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Lato-Bold.woff2 woff2 swap
Size 181 KB
Load time 586 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
Lato-BoldItalic.woff2 woff2 swap
Size 190 KB
Load time 727 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~362 KB and ~724 ms

A+
JS Bundles
9 scripts, 31 KB unused
PASS
9 scripts, 31 KB unused
Warning::
https://www.libreoffice.org/js/leaflet.js: 31 KB unused (61%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 31 KB
31 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.libreoffice.org/js/leaflet.js51 KB31 KB (61%)✓3rd
https://www.libreoffice.org/js/flexsearch.js12 KB—✓3rd
https://www.libreoffice.org/js/fastsearch.js2 KB—✓3rd
https://www.libreoffice.org/js/libreoffice.js3 KB—✓3rd
https://www.libreoffice.org/js/matomo.js1 KB—✓3rd
https://www.libreoffice.org/js/platform_detector.js2 KB—✓3rd
https://www.libreoffice.org/js/download.js2 KB—✓3rd
https://www.libreoffice.org/js/community_map.js6 KB—✓3rd
https://piwik.documentfoundation.org/piwik.js25 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

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+
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
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
48 requests over 3635ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 2.3 s LCP 2.9 shttps://libreoffice.org// https://libreoffice.org/ — 301 — 82 B — 489 ms — h2https://www.libreoffice.org/www.libreoffice.org/ https://www.libreoffice.org/ — 200 — 6.6 KiB — 170 ms — h2https://www.libreoffice.org/css/normalize.csswww.libreoffice.org/css/normalize.c... https://www.libreoffice.org/css/normalize.css — 200 — 2.5 KiB — 162 ms — h2https://www.libreoffice.org/css/default.csswww.libreoffice.org/css/default.css https://www.libreoffice.org/css/default.css — 200 — 9.4 KiB — 165 ms — h2https://www.libreoffice.org/css/leaflet.csswww.libreoffice.org/css/leaflet.css https://www.libreoffice.org/css/leaflet.css — 200 — 4.7 KiB — 318 ms — h2https://www.libreoffice.org/media/libreoffice-tdf-logo.svgwww.libreoffice.org/media/libreoffi... https://www.libreoffice.org/media/libreoffice-tdf-logo.svg — 200 — 4.8 KiB — 320 ms — h2https://www.libreoffice.org/media/screenshot_writer_hero.pngwww.libreoffice.org/media/screensho... https://www.libreoffice.org/media/screenshot_writer_hero.png — 200 — 97.4 KiB — 633 ms — h2https://www.libreoffice.org/js/flexsearch.jswww.libreoffice.org/js/flexsearch.j... https://www.libreoffice.org/js/flexsearch.js — 200 — 12.2 KiB — 632 ms — h2https://www.libreoffice.org/js/fastsearch.jswww.libreoffice.org/js/fastsearch.j... https://www.libreoffice.org/js/fastsearch.js — 200 — 2.4 KiB — 474 ms — h2https://www.libreoffice.org/js/libreoffice.jswww.libreoffice.org/js/libreoffice.... https://www.libreoffice.org/js/libreoffice.js — 200 — 3.1 KiB — 477 ms — h2https://www.libreoffice.org/js/matomo.jswww.libreoffice.org/js/matomo.js https://www.libreoffice.org/js/matomo.js — 200 — 994 B — 322 ms — h2https://www.libreoffice.org/js/leaflet.jswww.libreoffice.org/js/leaflet.js https://www.libreoffice.org/js/leaflet.js — 200 — 51.2 KiB — 357 ms — h2https://www.libreoffice.org/media/subtle-prism.svgwww.libreoffice.org/media/subtle-pr... https://www.libreoffice.org/media/subtle-prism.svg — 200 — 1.7 KiB — 294 ms — h2https://www.libreoffice.org/media/libo-base.svgwww.libreoffice.org/media/libo-base... https://www.libreoffice.org/media/libo-base.svg — 200 — 1.2 KiB — 303 ms — h2https://www.libreoffice.org/media/libo-impress.svgwww.libreoffice.org/media/libo-impr... https://www.libreoffice.org/media/libo-impress.svg — 200 — 1.3 KiB — 308 ms — h2https://www.libreoffice.org/media/libo-writer.svgwww.libreoffice.org/media/libo-writ... https://www.libreoffice.org/media/libo-writer.svg — 200 — 1.3 KiB — 311 ms — h2https://www.libreoffice.org/media/searchicon.pngwww.libreoffice.org/media/searchico... https://www.libreoffice.org/media/searchicon.png — 200 — 1.4 KiB — 313 ms — h2https://www.libreoffice.org/fonts/Lato-Regular.woff2www.libreoffice.org/fonts/Lato-Regu... https://www.libreoffice.org/fonts/Lato-Regular.woff2 — 200 — 179.3 KiB — 573 ms — h2https://www.libreoffice.org/fonts/Lato-Black.woff2www.libreoffice.org/fonts/Lato-Blac... https://www.libreoffice.org/fonts/Lato-Black.woff2 — 200 — 173.4 KiB — 583 ms — h2https://www.libreoffice.org/fonts/Lato-Bold.woff2www.libreoffice.org/fonts/Lato-Bold... https://www.libreoffice.org/fonts/Lato-Bold.woff2 — 200 — 181.4 KiB — 586 ms — h2https://www.libreoffice.org/fonts/Lato-BoldItalic.woff2www.libreoffice.org/fonts/Lato-Bold... https://www.libreoffice.org/fonts/Lato-BoldItalic.woff2 — 200 — 189.6 KiB — 727 ms — h2https://www.libreoffice.org/index.jsonwww.libreoffice.org/index.json https://www.libreoffice.org/index.json — 200 — 79.6 KiB — 431 ms — h2https://www.libreoffice.org/js/platform_detector.jswww.libreoffice.org/js/platform_det... https://www.libreoffice.org/js/platform_detector.js — 200 — 1.6 KiB — 164 ms — h2https://www.libreoffice.org/js/download.jswww.libreoffice.org/js/download.js https://www.libreoffice.org/js/download.js — 200 — 2.5 KiB — 166 ms — h2https://www.libreoffice.org/js/community_map.jswww.libreoffice.org/js/community_ma... https://www.libreoffice.org/js/community_map.js — 200 — 6.1 KiB — 165 ms — h2https://www.libreoffice.org/media/screenshot_writer.pngwww.libreoffice.org/media/screensho... https://www.libreoffice.org/media/screenshot_writer.png — 200 — 113.8 KiB — 172 ms — h2https://www.libreoffice.org/media/screenshot_calc.pngwww.libreoffice.org/media/screensho... https://www.libreoffice.org/media/screenshot_calc.png — 200 — 58.3 KiB — 168 ms — h2https://www.libreoffice.org/media/libo-calc.svgwww.libreoffice.org/media/libo-calc... https://www.libreoffice.org/media/libo-calc.svg — 200 — 1.2 KiB — 166 ms — h2https://piwik.documentfoundation.org/piwik.jspiwik.documentfoundation.org/piwik.... https://piwik.documentfoundation.org/piwik.js — 200 — 25.5 KiB — 1.6 s — h2https://www.libreoffice.org/media/screenshot_impress.pngwww.libreoffice.org/media/screensho... https://www.libreoffice.org/media/screenshot_impress.png — 200 — 80.5 KiB — 165 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 2.3 s LCP 2.9 shttps://libreoffice.org// https://libreoffice.org/ — 301 — 82 B — 489 ms — h2https://www.libreoffice.org/www.libreoffice.org/ https://www.libreoffice.org/ — 200 — 6.6 KiB — 170 ms — h2https://www.libreoffice.org/css/normalize.csswww.libreoffice.org/css/normalize.c... https://www.libreoffice.org/css/normalize.css — 200 — 2.5 KiB — 162 ms — h2https://www.libreoffice.org/css/default.csswww.libreoffice.org/css/default.css https://www.libreoffice.org/css/default.css — 200 — 9.4 KiB — 165 ms — h2https://www.libreoffice.org/css/leaflet.csswww.libreoffice.org/css/leaflet.css https://www.libreoffice.org/css/leaflet.css — 200 — 4.7 KiB — 318 ms — h2https://www.libreoffice.org/media/libreoffice-tdf-logo.svgwww.libreoffice.org/media/libreoffi... https://www.libreoffice.org/media/libreoffice-tdf-logo.svg — 200 — 4.8 KiB — 320 ms — h2https://www.libreoffice.org/media/screenshot_writer_hero.pngwww.libreoffice.org/media/screensho... https://www.libreoffice.org/media/screenshot_writer_hero.png — 200 — 97.4 KiB — 633 ms — h2https://www.libreoffice.org/js/flexsearch.jswww.libreoffice.org/js/flexsearch.j... https://www.libreoffice.org/js/flexsearch.js — 200 — 12.2 KiB — 632 ms — h2https://www.libreoffice.org/js/fastsearch.jswww.libreoffice.org/js/fastsearch.j... https://www.libreoffice.org/js/fastsearch.js — 200 — 2.4 KiB — 474 ms — h2https://www.libreoffice.org/js/libreoffice.jswww.libreoffice.org/js/libreoffice.... https://www.libreoffice.org/js/libreoffice.js — 200 — 3.1 KiB — 477 ms — h2https://www.libreoffice.org/js/matomo.jswww.libreoffice.org/js/matomo.js https://www.libreoffice.org/js/matomo.js — 200 — 994 B — 322 ms — h2https://www.libreoffice.org/js/leaflet.jswww.libreoffice.org/js/leaflet.js https://www.libreoffice.org/js/leaflet.js — 200 — 51.2 KiB — 357 ms — h2https://www.libreoffice.org/media/subtle-prism.svgwww.libreoffice.org/media/subtle-pr... https://www.libreoffice.org/media/subtle-prism.svg — 200 — 1.7 KiB — 294 ms — h2https://www.libreoffice.org/media/libo-base.svgwww.libreoffice.org/media/libo-base... https://www.libreoffice.org/media/libo-base.svg — 200 — 1.2 KiB — 303 ms — h2https://www.libreoffice.org/media/libo-impress.svgwww.libreoffice.org/media/libo-impr... https://www.libreoffice.org/media/libo-impress.svg — 200 — 1.3 KiB — 308 ms — h2https://www.libreoffice.org/media/libo-writer.svgwww.libreoffice.org/media/libo-writ... https://www.libreoffice.org/media/libo-writer.svg — 200 — 1.3 KiB — 311 ms — h2https://www.libreoffice.org/media/searchicon.pngwww.libreoffice.org/media/searchico... https://www.libreoffice.org/media/searchicon.png — 200 — 1.4 KiB — 313 ms — h2https://www.libreoffice.org/fonts/Lato-Regular.woff2www.libreoffice.org/fonts/Lato-Regu... https://www.libreoffice.org/fonts/Lato-Regular.woff2 — 200 — 179.3 KiB — 573 ms — h2https://www.libreoffice.org/fonts/Lato-Black.woff2www.libreoffice.org/fonts/Lato-Blac... https://www.libreoffice.org/fonts/Lato-Black.woff2 — 200 — 173.4 KiB — 583 ms — h2https://www.libreoffice.org/fonts/Lato-Bold.woff2www.libreoffice.org/fonts/Lato-Bold... https://www.libreoffice.org/fonts/Lato-Bold.woff2 — 200 — 181.4 KiB — 586 ms — h2https://www.libreoffice.org/fonts/Lato-BoldItalic.woff2www.libreoffice.org/fonts/Lato-Bold... https://www.libreoffice.org/fonts/Lato-BoldItalic.woff2 — 200 — 189.6 KiB — 727 ms — h2https://www.libreoffice.org/index.jsonwww.libreoffice.org/index.json https://www.libreoffice.org/index.json — 200 — 79.6 KiB — 431 ms — h2https://www.libreoffice.org/js/platform_detector.jswww.libreoffice.org/js/platform_det... https://www.libreoffice.org/js/platform_detector.js — 200 — 1.6 KiB — 164 ms — h2https://www.libreoffice.org/js/download.jswww.libreoffice.org/js/download.js https://www.libreoffice.org/js/download.js — 200 — 2.5 KiB — 166 ms — h2https://www.libreoffice.org/js/community_map.jswww.libreoffice.org/js/community_ma... https://www.libreoffice.org/js/community_map.js — 200 — 6.1 KiB — 165 ms — 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https://piwik.documentfoundation.org/piwik.php?action_name=LibreOffice&idsite=1&rec=1&r=489889&h=20&m=50&s=11&url=https%3A%2F%2Fwww.libreoffice.org%2F&_id=&_idn=1&send_image=0&_refts=0&pv_id=JFUu3J&pf_net=0&pf_srv=158&pf_tfr=3&pf_dm1=18&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not-A.Brand%22%2C%22version%22%3A%2224.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22146.0.7680.164%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823 — 204 — 402 B — 225 ms — h2https://www.libreoffice.org/favicon.icowww.libreoffice.org/favicon.ico https://www.libreoffice.org/favicon.ico — 200 — 1.6 KiB — 161 ms — h2
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 1980ms · 64KB · €5/mo
Unattributable
Other
Costly
Execution 959ms
Transfer 0 KB
Monthly Cost €2/mo
www.libreoffice.org
Other
Costly
Execution 553ms
Transfer 7 KB
Monthly Cost €1/mo
www.libreoffice.org
Other
Costly
Execution 256ms
Transfer 51 KB
Unused 61%
Monthly Cost €1/mo
www.libreoffice.org
Other
Costly
Execution 212ms
Transfer 6 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 959ms and costs ~€2/month
  • www.libreoffice.org adds 553ms and costs ~€1/month
  • www.libreoffice.org adds 256ms and costs ~€1/month
  • www.libreoffice.org adds 212ms and costs ~€1/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

Unattributable takes 959ms 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.libreoffice.org takes 553ms 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.libreoffice.org takes 256ms 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

61% of www.libreoffice.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

www.libreoffice.org takes 212ms 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

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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