Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

100

Best Practices

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.07 s

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

1.22 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.

0.081

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

1.07 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.

1.22 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

11 PASS 3 REVIEW 1 FIX

HTTP Caching

Action

No cache headers

FIX

No cache headers

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.

Image Optimization

22 images, 0 KB saveable

REVIEW

22 images, 0 KB saveable

All images are well-optimized

22 images 73 KB

0 oversized -0 KB

18 legacy format

0 missing dimensions CLS risk

JS Execution Cost

576ms total JS execution

REVIEW

576ms total JS execution

Unattributable: 349ms CPU time

https://weblate.org/en/: 227ms CPU time

Third-party scripts: 349ms (61% of total)

Main Thread Breakdown

Other 56% Style & Layout 30% Rendering 6% Parse HTML & CSS 4% Script Evaluation 3%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	349ms	7ms	0ms	3rd
https://weblate.org/en/	227ms	4ms	1ms	1st

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Page Weight Budget

539 KB transferred, 34 requests

PASS

539 KB transferred, 34 requests

Page weighs 673 KB (539 KB transferred)

Fonts are 422 KB — consider subsetting or using system fonts

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

Got: 422 KB

34 HTTP requests

Estimated 0.11 g CO2 per page load

539 KB transferred

34 requests

0.11 g CO2 per page load

Fonts 421.7 KiB 78%

Images 72.5 KiB 13%

CSS 28.9 KiB 5%

HTML 7.5 KiB 1%

JavaScript 5.5 KiB 1%

Other 2.2 KiB 0%

Other 1.0 KiB 0%

0 2.4 MB 4.9 MB

Under budget

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

A+

Third-Party Impact

No third-party resources

PASS

No third-party resources

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

All text resources are properly compressed.

A+

Font Loading

4 fonts (422 KB)

PASS

4 fonts (422 KB)

4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

422 KB total

Render-blocking

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

SourceSans3-Semibold.tt... woff2 swap

Size 107 KB

Load time 108 ms

Start 410 ms

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

SourceSans3-Regular.ttf... woff2 swap

Size 107 KB

Load time 77 ms

Start 411 ms

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

SourceSans3-Bold.ttf.woff2 woff2 swap

Size 106 KB

Load time 76 ms

Start 411 ms

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

SourceSans3-ExtraLight.... woff2 swap

Size 101 KB

Load time 107 ms

Start 411 ms

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 ~211 KB and ~422 ms

A+

JS Bundles

1 scripts, 0 KB unused

PASS

1 scripts, 0 KB unused

0 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://weblate.org/static/CACHE/js/output.bd47045a3676.js	6 KB	—	✓	1st

A+

Resource Caching

All resources properly cached

PASS

All resources properly cached

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

No optimization needed

PASS

No optimization needed

No resource hint issues

A+

Page Weight Inventory

34 resources · 539 KB · 0 KB savings available

PASS

34 resources · 539 KB · 0 KB savings available

Within 1MB page-weight target

Got: 539 KB

34 resources · 539.4 KiB · 0 third-party Within 1MB page-weight target

Font 78% · 421.7 KiB

Image 14% · 73.9 KiB

CSS 5% · 28.9 KiB

Document 2% · 8.3 KiB

JavaScript 1% · 5.5 KiB

Other 0% · 1.0 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

34 resources			539.4 KiB

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

Network Waterfall

34 requests over 567ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

61% of JavaScript execution is third-party

First-party Third-party 349ms · 0KB · €4/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	349ms	0 KB	—	€4/mo	Costly

Unattributable

Other

Costly

Execution 349ms

Transfer 0 KB

Monthly Cost €4/mo

These scripts may cost more than they're worth

Unattributable adds 349ms and costs ~€4/month

61% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

Unattributable takes 349ms 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.