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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
96
GRADE
A
FIX
0
REVIEW
1
PASS
12
INFO
1

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

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

257 ms

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

406 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.

0.029

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

312 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.

406 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
14
12 PASS 1 REVIEW
C
Image Optimization
Action
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Warning::
https://f-droid.org/assets/fdroid-logo-text_S0MUfk... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://f-droid.org/assets/download-fdroid-qr_rt62... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://f-droid.org/assets/phone-frame_kEDoOnDDPLn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://f-droid.org/assets/opencollective_button_i... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://f-droid.org/assets/liberapay_donate_button... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
8 images 106 KB
0 oversized -0 KB
8 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
164 KB transferred, 16 requests
PASS
164 KB transferred, 16 requests
Info::
Page weighs 347 KB (164 KB transferred)
Info::
16 HTTP requests
Info::
Estimated 0.03 g CO2 per page load
164 KB / 2.4 MB budget
164 KB transferred
16 requests
0.03 g CO2 per page load
Images 105.8 KiB 65%
Fonts 32.1 KiB 20%
CSS 7.4 KiB 5%
JavaScript 6.8 KiB 4%
HTML 5.6 KiB 3%
Other 4.5 KiB 3%
Other 1.7 KiB 1%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
No third-party resources
PASS
No third-party resources
Info::
No third-party resources detected
No third-party resources detected — all resources are first-party.
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
No JS execution data
PASS
No JS execution data
Info::
No significant JS execution detected

Main Thread Breakdown

Other 52% Style & Layout 33% Script Evaluation 7% Rendering 4% Parse HTML & CSS 4%
A+
Font Loading
1 fonts (32 KB)
PASS
1 fonts (32 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

32 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 257 ms LCP 406 mshttps://f-droid.org/assets/roboto_ln5c7Pv79kCZw8EjInNILddDbwVxQmaVPE0sjunCivU=.ttfroboto_ln5c7Pv79kCZw8Ej... https://f-droid.org/assets/roboto_ln5c7Pv79kCZw8EjInNILddDbwVxQmaVPE0sjunCivU=.ttf — 32.1 KiB — 91 ms — font-display: swap
roboto_ln5c7Pv79kCZw8Ej... ttf swap
Size 32 KB
Load time 91 ms
Start 168 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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 ~10 KB and ~20 ms

A+
JS Bundles
3 scripts, 0 KB unused
PASS
3 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://f-droid.org/assets/banner_YoMGgpdLnM6lO1-eNiEaJsDGclXrmjSlTM-8RGlLcho=.js3 KB—✓1st
https://f-droid.org/assets/donate_JH0mCNwawhPK42f7esD5bhYNybwPzSBMKoUvyTlH-Gw=.js2 KB—✓1st
https://f-droid.org/assets/sidebar-lang_j4kvB8VghKUiWGs4HpqMvN0Ucx0tTmJ_lRfuoUmiaqc=.js3 KB—✓1st
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
16 resources · 164 KB · 0 KB savings available
PASS
16 resources · 164 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 164 KB
16 resources · 163.8 KiB · 0 third-party Within 1MB page-weight target
Image 67% · 110.2 KiB
Font 20% · 32.1 KiB
CSS 5% · 7.4 KiB
JavaScript 4% · 6.8 KiB
Document 3% · 5.6 KiB
Other 1% · 1.7 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

A+
HTTP Caching
max-age=600 (10 minutes)
PASS
max-age=600 (10 minutes)
Info::
Cache-Control header is set
Got: max-age=600, public, immutable, stale-while-revalidate=300
Info::
Effective TTL: 10 minutes (max-age=600)
Info::
ETag present — enables conditional (304) responses
Info::
Last-Modified header present
Cache-Control

max-age=600, public, immutable, stale-while-revalidate=300

DirectiveValueMeaning
max-age600Cache for 10 minutes
public—Any cache may store this response
immutable—Content will never change
stale-while-revalidate300Serve stale for 5 minutes while fetching fresh
Effective TTL: 600 seconds
Network Waterfall
16 requests over 417ms
INFO
0 ms 200 ms 400 ms FCP 257 ms LCP 406 mshttps://f-droid.org// https://f-droid.org/ — 200 — 5.6 KiB — 159 ms — h2https://f-droid.org/assets/roboto_ln5c7Pv79kCZw8EjInNILddDbwVxQmaVPE0sjunCivU=.ttf/assets/roboto_ln5c7Pv79kCZw8EjInNI... https://f-droid.org/assets/roboto_ln5c7Pv79kCZw8EjInNILddDbwVxQmaVPE0sjunCivU=.ttf — 200 — 32.1 KiB — 91 ms — h2https://f-droid.org/css/main.css/css/main.css https://f-droid.org/css/main.css — 200 — 7.4 KiB — 47 ms — h2https://f-droid.org/assets/fdroid-logo-text_S0MUfk_FsnAYL7n2MQye-34IoSNm6QM6xYjDnMqkufo=.svg/assets/fdroid-logo-text_S0MUfk_Fsn... https://f-droid.org/assets/fdroid-logo-text_S0MUfk_FsnAYL7n2MQye-34IoSNm6QM6xYjDnMqkufo=.svg — 200 — 15.8 KiB — 152 ms — h2https://f-droid.org/assets/download-fdroid-qr_rt62kUMmGMIMhgDgUUWjYefCQjazGqLRlAZ7WOgSSlg=.png/assets/download-fdroid-qr_rt62kUMm... https://f-droid.org/assets/download-fdroid-qr_rt62kUMmGMIMhgDgUUWjYefCQjazGqLRlAZ7WOgSSlg=.png — 200 — 665 B — 92 ms — h2https://f-droid.org/assets/phone-frame_kEDoOnDDPLnsqH4lVaEun9wfQgM9ivrhk5OiUWWdKHc=.png/assets/phone-frame_kEDoOnDDPLnsqH4... https://f-droid.org/assets/phone-frame_kEDoOnDDPLnsqH4lVaEun9wfQgM9ivrhk5OiUWWdKHc=.png — 200 — 14.5 KiB — 89 ms — h2https://f-droid.org/assets/opencollective_button_iIGF0Hixdj0EaYR3Sd7FRigTVcl7QPGu6kaoBmXHjZI=.png/assets/opencollective_button_iIGF0... https://f-droid.org/assets/opencollective_button_iIGF0Hixdj0EaYR3Sd7FRigTVcl7QPGu6kaoBmXHjZI=.png — 200 — 11.9 KiB — 90 ms — h2https://f-droid.org/assets/liberapay_donate_button_GHdOOfmFJNeSXjfjnA-98XtIuEfvE6cNJjHgHOhjdv0=.svg/assets/liberapay_donate_button_GHd... https://f-droid.org/assets/liberapay_donate_button_GHdOOfmFJNeSXjfjnA-98XtIuEfvE6cNJjHgHOhjdv0=.svg — 200 — 2.2 KiB — 132 ms — h2https://f-droid.org/assets/banner_YoMGgpdLnM6lO1-eNiEaJsDGclXrmjSlTM-8RGlLcho=.js/assets/banner_YoMGgpdLnM6lO1-eNiEa... https://f-droid.org/assets/banner_YoMGgpdLnM6lO1-eNiEaJsDGclXrmjSlTM-8RGlLcho=.js — 200 — 2.6 KiB — 143 ms — h2https://f-droid.org/assets/donate_JH0mCNwawhPK42f7esD5bhYNybwPzSBMKoUvyTlH-Gw=.js/assets/donate_JH0mCNwawhPK42f7esD5... https://f-droid.org/assets/donate_JH0mCNwawhPK42f7esD5bhYNybwPzSBMKoUvyTlH-Gw=.js — 200 — 1.7 KiB — 134 ms — h2https://f-droid.org/assets/sidebar-lang_j4kvB8VghKUiWGs4HpqMvN0Ucx0tTmJ_lRfuoUmiaqc=.js/assets/sidebar-lang_j4kvB8VghKUiWG... https://f-droid.org/assets/sidebar-lang_j4kvB8VghKUiWGs4HpqMvN0Ucx0tTmJ_lRfuoUmiaqc=.js — 200 — 2.6 KiB — 140 ms — h2https://f-droid.org/assets/mastodon_-c62Zo613I00cO-RavNTybrSJhBC3vZToN5u4zSoMdM=.svg/assets/mastodon_-c62Zo613I00cO-Rav... https://f-droid.org/assets/mastodon_-c62Zo613I00cO-RavNTybrSJhBC3vZToN5u4zSoMdM=.svg — 200 — 2.2 KiB — 136 ms — h2https://f-droid.org/assets/site_J9OLInBmO2hLlutzRFC4mdstNJjL44B6NzBbT0ecmA0=.webmanifest/assets/site_J9OLInBmO2hLlutzRFC4md... https://f-droid.org/assets/site_J9OLInBmO2hLlutzRFC4mdstNJjL44B6NzBbT0ecmA0=.webmanifest — 200 — 1.7 KiB — 145 ms — h2https://f-droid.org/assets/fdroid-screenshot-en.png/assets/fdroid-screenshot-en.png https://f-droid.org/assets/fdroid-screenshot-en.png — 200 — 56.9 KiB — 57 ms — h2https://f-droid.org/assets/ic_search_black_24px.svg/assets/ic_search_black_24px.svg https://f-droid.org/assets/ic_search_black_24px.svg — 200 — 1.6 KiB — 57 ms — h2https://f-droid.org/assets/favicon_yJPr4UNteJc-cseeq16P0Hvl1kDbJjTVYcj-KA6-_Fs=.ico/assets/favicon_yJPr4UNteJc-cseeq16... https://f-droid.org/assets/favicon_yJPr4UNteJc-cseeq16P0Hvl1kDbJjTVYcj-KA6-_Fs=.ico — 200 — 4.5 KiB — 69 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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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