Performance
· 23 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.
1.68 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
43 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.111
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.77 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.
2.80 s
Page Load Progression
DPage Weight BudgetAction2.5 MB transferred, 65 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
FJS BundlesAction32 scripts, 815 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.homeaffairs.gov.au/assetlibrary/dist/lib/ckeditor/4.11.2/standard/ckeditor.js | 182 KB | 158 KB (87%) | ✓ | 1st |
| https://www.homeaffairs.gov.au/_layouts/15/core.js?rev=oRQ2cXDF8VphLy8wzbttOw%3D%3DTAG0 | 130 KB | 118 KB (91%) | ✓ | 1st |
| https://media-aus.inq.com/media/launch/tcFramework_jssdk.min.js?codeVersion=1788448027505 | 132 KB | 104 KB (78%) | ✓ | 3rd |
| https://www.homeaffairs.gov.au/AssetLibrary/dist/js/app.library.js | 115 KB | 74 KB (65%) | ✗ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-VJMFJ4QKL5&cx=c>m=4e6a61 | 164 KB | 73 KB (44%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-N2HGXM | 148 KB | 72 KB (49%) | ✓ | 3rd |
| https://www.homeaffairs.gov.au/AssetLibrary/dist/angular/tiles-topics.js | 145 KB | 71 KB (49%) | ✓ | 1st |
| https://www.homeaffairs.gov.au/_layouts/15/init.js?rev=A4j0bsbin19lFPhsOnGMQg%3D%3DTAG0 | 83 KB | 56 KB (68%) | ✓ | 1st |
| https://www.homeaffairs.gov.au/AssetLibrary/dist/js/app.core.js | 51 KB | 36 KB (72%) | ✓ | 1st |
| https://siteintercept.qualtrics.com/dxjsmodule/626.f1341641e1aee64bc027.chunk.js?Q_CLIENTVERSION=2.58.0&Q_CLIENTTYPE=web&Q_BRANDID=www.homeaffairs.gov.au | 40 KB | 31 KB (78%) | ✓ | 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
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
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
FPage Weight InventoryAction65 resources · 2.5 MB · 815 KB savings availableFIX
~815.1 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 65 resources | 2.5 MiB | ||||||
BImage Optimization5 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
BJS Execution Cost554ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.homeaffairs.gov.au/research-and-statistics/statistics/citizenship-statistics | 190ms | 31ms | 4ms | 1st |
| Unattributable | 126ms | 4ms | 0ms | 1st |
| https://www.homeaffairs.gov.au/AssetLibrary/dist/js/app.library.js | 91ms | 62ms | 11ms | 1st |
| https://www.homeaffairs.gov.au/AssetLibrary/dist/angular/tiles-topics.js | 91ms | 78ms | 9ms | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-VJMFJ4QKL5&cx=c>m=4e6a61 | 56ms | 46ms | 9ms | 3rd |
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
CDocument CompressionActionDocument response served uncompressedREVIEW
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP Cachingmax-age=0REVIEW
max-age=0
| Directive | Value | Meaning |
|---|---|---|
| max-age | 0 | Cache for 0 seconds |
AThird-Party Impact25% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (176 KB)PASS
Web fonts
6
176 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~2 KB and ~4 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Main HTML Cache-ControlMain HTML max-age=0 (≤ 5min) is appropriatePASS
A+Server Response Intelligence1 server-response signal(s) detectedPASS
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall65 requests over 3849msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 56ms | 164 KB | 44% | A$1/mo | Optional |
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-09-09 — 2026-10-06)
LCP (p75)
2074 ms
83% good
INP (p75)
44 ms
99% good
CLS (p75)
0.100
64% good
FCP (p75)
2016 ms
TTFB (p75)
974 ms