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.
3.75 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
23.93 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
841 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.
7.73 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.
24.23 s
Page Load Progression
FPage Weight BudgetAction30.7 MB transferred, 278 requestsFIX
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
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
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
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
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction5737ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.au.com/ | 1021ms | 77ms | 3ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5JT4BBWC>m=4e64k1 | 609ms | 544ms | 20ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-56CSDJ | 552ms | 480ms | 45ms | 3rd |
| Unattributable | 430ms | 10ms | 0ms | 3rd |
| https://www.au.com/etc.clientlibs/clientlibs/granite/jquery/granite/csrf.lc-652a558c3774088b61b0530c184710d1-lc.min.js | 405ms | 339ms | 0ms | 3rd |
| https://www.googleoptimize.com/optimize.js?id=OPT-P3FZVN9 | 299ms | 278ms | 12ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-WDP7BMG>m=4e64k1 | 250ms | 212ms | 32ms | 3rd |
| https://www.au.com/etc.clientlibs/au-com/clientlibs/jquery.lc-3f56e989e786c643b30d5668a97daa52-lc.min.js | 235ms | 102ms | 3ms | 3rd |
| https://www.au.com/etc.clientlibs/au-com/clientlibs/clientlib-site.lc-8daae59af8caa2ae7bf2cfb82441fafd-lc.min.js | 221ms | 93ms | 53ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-P2QXJ6Q>m=4e64k1 | 187ms | 158ms | 23ms | 3rd |
Showing top 10 of 24 scripts
FJS BundlesAction73 scripts, 1.8 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://engage.chat-message.au.com/bannerFunction.js?v=commitHash:%20d099bd8&webmch=webm | 371 KB | 339 KB (92%) | ✓ | 3rd |
| https://www.au.com/etc.clientlibs/au-com/clientlibs/clientlib-site.lc-8daae59af8caa2ae7bf2cfb82441fafd-lc.min.js | 351 KB | 275 KB (82%) | ✓ | 3rd |
| https://lpcdn.lpsnmedia.net/le_unified_window/10.47.0-release_2318786578/desktopEmbedded.js?version=10.47.0-release_2318786578 | 265 KB | 182 KB (69%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-KVC899J>m=4e64k1 | 181 KB | 80 KB (45%) | ✓ | 3rd |
| https://www.au.com/etc.clientlibs/au-com/clientlibs/clientlib-dependencies.lc-05795a2fd8bfa88119f743660ee2e83c-lc.min.js | 96 KB | 77 KB (80%) | ✓ | 3rd |
| https://www.googleoptimize.com/optimize.js?id=OPT-P3FZVN9 | 112 KB | 67 KB (60%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-P2QXJ6Q>m=4e64k1 | 176 KB | 67 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-5JT4BBWC>m=4e64k1 | 160 KB | 66 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-TGJVHGDZ>m=4e64k1 | 118 KB | 63 KB (54%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-8LW7DLSMNS&cx=c>m=4e64k1 | 147 KB | 63 KB (43%) | ✓ | 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 InventoryAction278 resources · 30.7 MB · 1.8 MB savings availableFIX
~1.8 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 278 resources | 30.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction125 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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading30 fonts (6092 KB)PASS
Web fonts
30
6092 KB total
Render-blocking
0
of 30
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
- 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 ~4475 KB and ~8950 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall278 requests over 7790msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.au.com www.au.com | Other | 1021ms | 36 KB | — | ¥2631/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 609ms | 160 KB | 41% | ¥1570/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 552ms | 223 KB | 24% | ¥1423/mo | Costly |
Unattributable Unattributable | Other | 430ms | 0 KB | — | ¥1108/mo | Costly |
www.au.com www.au.com | Other | 405ms | 2 KB | — | ¥1043/mo | Costly |
www.googleoptimize.com www.googleoptimize.com | Other | 299ms | 112 KB | 60% | ¥770/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 250ms | 194 KB | 28% | ¥644/mo | Costly |
www.au.com www.au.com | Other | 235ms | 33 KB | — | ¥607/mo | Costly |
www.au.com www.au.com | Other | 221ms | 351 KB | 82% | ¥570/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 187ms | 176 KB | 38% | ¥481/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 180ms | 171 KB | 34% | ¥464/mo | Costly |
Adobe Fonts use.typekit.net | Font | 170ms | 363 KB | — | ¥438/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 153ms | 181 KB | 45% | ¥394/mo | Costly |
www.au.com www.au.com | Other | 149ms | 26 KB | — | ¥384/mo | Costly |
Google Analytics www.google-analytics.com | Analytics | 138ms | 21 KB | — | ¥355/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 131ms | 154 KB | 37% | ¥339/mo | Costly |
engage.chat-message.au.com engage.chat-message.au.com | Other | 126ms | 371 KB | 92% | ¥325/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 82ms | 147 KB | 42% | ¥212/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 79ms | 146 KB | 42% | ¥204/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 72ms | 147 KB | 43% | ¥186/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 68ms | 134 KB | 45% | ¥175/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 66ms | 137 KB | 44% | ¥171/mo | Costly |
lpcdn.lpsnmedia.net lpcdn.lpsnmedia.net | Other | 63ms | 265 KB | 69% | ¥162/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 52ms | 118 KB | 54% | ¥133/mo | Costly |
These scripts may cost more than they're worth
- www.au.com adds 1021ms and costs ~¥2631/month
- Google Tag Manager adds 609ms and costs ~¥1570/month
- Google Tag Manager adds 552ms and costs ~¥1423/month
- Unattributable adds 430ms and costs ~¥1108/month
- www.au.com adds 405ms and costs ~¥1043/month
- www.googleoptimize.com adds 299ms and costs ~¥770/month
- Google Tag Manager adds 250ms and costs ~¥644/month
- www.au.com adds 235ms and costs ~¥607/month
- www.au.com adds 221ms and costs ~¥570/month
- Google Tag Manager adds 187ms and costs ~¥481/month
- Google Tag Manager adds 180ms and costs ~¥464/month
- Adobe Fonts adds 170ms and costs ~¥438/month
- Google Tag Manager adds 153ms and costs ~¥394/month
- www.au.com adds 149ms and costs ~¥384/month
- Google Analytics adds 138ms and costs ~¥355/month
- Google Tag Manager adds 131ms and costs ~¥339/month
- engage.chat-message.au.com adds 126ms and costs ~¥325/month
- Google Tag Manager adds 82ms and costs ~¥212/month
- Google Tag Manager adds 79ms and costs ~¥204/month
- Google Tag Manager adds 72ms and costs ~¥186/month
- Google Tag Manager adds 68ms and costs ~¥175/month
- Google Tag Manager adds 66ms and costs ~¥171/month
- lpcdn.lpsnmedia.net adds 63ms and costs ~¥162/month
- Google Tag Manager adds 52ms and costs ~¥133/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.au.com takes 1021ms 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
Google Tag Manager takes 609ms 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
Google Tag Manager takes 552ms 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
Unattributable takes 430ms 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
www.au.com takes 405ms 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
www.googleoptimize.com takes 299ms 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
60% of www.googleoptimize.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 250ms 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
www.au.com takes 235ms 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
www.au.com takes 221ms 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
82% of www.au.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 187ms 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
Google Tag Manager takes 180ms 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
Adobe Fonts takes 170ms 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
Google Tag Manager takes 153ms 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
www.au.com takes 149ms 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
Google Analytics takes 138ms 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
Google Tag Manager takes 131ms 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
engage.chat-message.au.com takes 126ms 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
92% of engage.chat-message.au.com's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 82ms 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
Google Tag Manager takes 79ms 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
Google Tag Manager takes 72ms 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
Google Tag Manager takes 68ms 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
Google Tag Manager takes 66ms 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
lpcdn.lpsnmedia.net takes 63ms 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
69% of lpcdn.lpsnmedia.net's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 52ms 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
54% of Google Tag Manager's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev