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

100

Accessibility

100

Best Practices

100

SEO

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

2.79 s

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

3.69 s

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

106 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.

3.37 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.

7.29 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

10 PASS 3 REVIEW 2 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (863.5 KiB of 865.2 KiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: no-cache, no-store, must-revalidate, max-age=0

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

no-cache, no-store, must-revalidate, max-age=0

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first
no-store	—	Never cache this response
must-revalidate	—	Must recheck with server after expiry
max-age	0	Cache for 0 seconds

Image Optimization

Action

11 images, 0 KB saveable

REVIEW

11 images, 0 KB saveable

https://cdn.joomla.org/rochen/rochen_footer_logo_w... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

https://cdn.joomla.org/images/joomla-colours-logo.... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

11 images 93 KB

0 oversized -0 KB

10 legacy format

2 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

JS Execution Cost

Action

1444ms total JS execution

REVIEW

1444ms total JS execution

https://www.joomla.org/: 637ms CPU time

Unattributable: 421ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-X283...: 188ms CPU time

https://www.googletagmanager.com/gtm.js?id=GTM-WWC...: 134ms CPU time

https://www.google-analytics.com/analytics.js: 64ms CPU time

Third-party scripts: 1444ms (100% of total)

Main Thread Breakdown

Other 35% Script Evaluation 25% Style & Layout 18% Rendering 10% Script Parsing & Compilation 7% Parse HTML & CSS 4%

Script	Total	Scripting	Parse/Compile	Party
https://www.joomla.org/	637ms	7ms	2ms	3rd
Unattributable	421ms	66ms	0ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-X283HVFSTN&cx=c&_slc=1	188ms	134ms	45ms	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WWC8WL	134ms	95ms	38ms	3rd
https://www.google-analytics.com/analytics.js	64ms	53ms	6ms	3rd

JS Bundles

17 scripts, 136 KB unused

REVIEW

17 scripts, 136 KB unused

https://www.googletagmanager.com/gtag/js?id=G-X283...: 71 KB unused (43%)

Consider code splitting or tree shaking to reduce unused code.

https://www.googletagmanager.com/gtm.js?id=GTM-WWC...: 65 KB unused (53%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 136 KB

136 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtag/js?id=G-X283HVFSTN&cx=c&_slc=1	164 KB	71 KB (43%)	✓	3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WWC8WL	122 KB	65 KB (53%)	✓	3rd
https://www.joomla.org/media/com_finder/js/finder.min.js?fef28a772797e455407289af062167ac	1 KB	—	✓	3rd
https://www.joomla.org/media/templates/site/joomla/js/template.js?858508	1 KB	—	✓	3rd
https://www.joomla.org/media/system/js/core.min.js?fef28a772797e455407289af062167ac	4 KB	—	✓	3rd
https://www.joomla.org/media/system/js/messages.min.js?fef28a772797e455407289af062167ac	2 KB	—	✓	3rd
https://www.joomla.org/media/templates/site/joomla/js/blockadblock.js?3.2.1	4 KB	—	✓	3rd
https://www.joomla.org/media/templates/site/joomla/js/js.cookie.js?2.1.4	2 KB	—	✓	3rd
https://www.joomla.org/media/vendor/skipto/js/skipto.min.js?4.1.7	10 KB	—	✓	3rd
https://www.joomla.org/media/mod_menu/js/menu.min.js?fef28a772797e455407289af062167ac	2 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

Page Weight Budget

865 KB transferred, 45 requests

PASS

865 KB transferred, 45 requests

Page weighs 1.9 MB (865 KB transferred)

Fonts are 315 KB — consider subsetting or using system fonts

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

Got: 315 KB

45 HTTP requests

Estimated 0.18 g CO2 per page load

865 KB transferred

45 requests

0.18 g CO2 per page load

JavaScript 359.4 KiB 42%

Fonts 314.7 KiB 36%

Images 93.3 KiB 11%

CSS 79.7 KiB 9%

HTML 12.8 KiB 1%

Other 4.1 KiB 0%

Other 678 B 0%

Other 549 B 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+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

3 fonts (315 KB)

PASS

3 fonts (315 KB)

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

Web fonts

315 KB total

Render-blocking

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

memvYaGs126MiZpBA-UvWbX... woff2 swap

Size 42 KB

Load time 42 ms

Start 984 ms

Risk FOUT — text flashes from fallback to web font

fa-solid-900.woff2 woff2 swap

Size 155 KB

Load time 54 ms

Start 984 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

fa-brands-400.woff2 woff2 swap

Size 118 KB

Load time 51 ms

Start 985 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 ~136 KB and ~272 ms

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

Page Weight Inventory

45 resources · 865 KB · 136 KB savings available

PASS

45 resources · 865 KB · 136 KB savings available

Within 1MB page-weight target

Got: 865 KB

~136 KB of savings available

44 third-party resources (100% of weight)

45 resources · 865.2 KiB · 44 third-party Within 1MB page-weight target

JavaScript 42% · 359.4 KiB

Font 36% · 314.7 KiB

Image 11% · 95.6 KiB

CSS 9% · 79.7 KiB

Document 2% · 14.6 KiB

Other 0% · 1.2 KiB

~135.7 KiB of savings available

Remove unused JavaScript: 135.7 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

45 resources			865.2 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

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall

45 requests over 1634ms

INFO

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 1444ms · 320KB · £15/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
www.joomla.org www.joomla.org	Other	637ms	13 KB	—	£7/mo	Costly
Unattributable Unattributable	Other	421ms	0 KB	—	£4/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	188ms	164 KB	43%	£2/mo	Optional
Google Tag Manager www.googletagmanager.com	Tag Manager	134ms	122 KB	53%	£1/mo	Optional
Google Analytics www.google-analytics.com	Analytics	64ms	21 KB	—	£1/mo	Optional

www.joomla.org

Other

Costly

Execution 637ms

Transfer 13 KB

Monthly Cost £7/mo

Unattributable

Other

Costly

Execution 421ms

Transfer 0 KB

Monthly Cost £4/mo

Google Tag Manager

Tag Manager

Optional

Execution 188ms

Transfer 164 KB

Unused 43%

Monthly Cost £2/mo

Google Tag Manager

Tag Manager

Optional

Execution 134ms

Transfer 122 KB

Unused 53%

Monthly Cost £1/mo

Google Analytics

Analytics

Optional

Execution 64ms

Transfer 21 KB

Monthly Cost £1/mo

These scripts may cost more than they're worth

www.joomla.org adds 637ms and costs ~£7/month
Unattributable adds 421ms and costs ~£4/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

www.joomla.org takes 637ms 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

Unattributable takes 421ms 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

53% of Google Tag Manager'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.