Performance
· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.14 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.14 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.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.52 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.
2.15 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DHTTP CachingActionno-store (uncacheable)FIX
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 |
CImage OptimizationAction16 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BJS Bundles17 scripts, 136 KB unusedREVIEW
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?c7c127 | 1 KB | — | ✓ | 3rd |
| https://www.joomla.org/media/system/js/core.min.js?fef28a772797e455407289af062167ac | 3 KB | — | ✓ | 3rd |
| https://www.joomla.org/media/system/js/messages.min.js?fef28a772797e455407289af062167ac | 3 KB | — | ✓ | 3rd |
| https://www.joomla.org/media/templates/site/joomla/js/blockadblock.js?3.2.1 | 2 KB | — | ✓ | 3rd |
| https://www.joomla.org/media/templates/site/joomla/js/js.cookie.js?2.1.4 | 3 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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
APage Weight Budget1022 KB transferred, 50 requestsPASS
Subset fonts to include only used characters, or switch to system font stacks.
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 CompressionAll text resources are compressedPASS
A+JS Execution Cost332ms total JS executionPASS
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.joomla.org/ | 210ms | 3ms | 0ms | 3rd |
| Unattributable | 122ms | 17ms | 0ms | 3rd |
A+Font Loading3 fonts (315 KB)PASS
Web fonts
3
315 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
APage Weight Inventory50 resources · 1022 KB · 136 KB savings availablePASS
~136.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 50 resources | 1022.4 KiB | ||||||
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall50 requests over 1586msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.joomla.org www.joomla.org | Other | 210ms | 13 KB | — | £2/mo | Costly |
Unattributable Unattributable | Other | 122ms | 0 KB | — | £1/mo | Optional |
These scripts may cost more than they're worth
- www.joomla.org adds 210ms and costs ~£2/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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 210ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev