Performance
· 17 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.
6.88 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.78 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
560 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.005
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
9.32 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.
16.72 s
Page Load Progression
DPage Weight BudgetAction2.5 MB transferred, 82 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
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS Execution CostAction3438ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-js.982a02b02f679df8eafac1b6a6e4fc85.js | 712ms | 449ms | 65ms | 3rd |
| Unattributable | 625ms | 175ms | 0ms | 3rd |
| https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/launch-a9ab0e6066cc.min.js | 561ms | 481ms | 56ms | 3rd |
| https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-chunk-all-components-frontend-svelte-js.b9124dec.js | 534ms | 372ms | 87ms | 3rd |
| https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 465ms | 334ms | 120ms | 3rd |
| https://www.sydney.edu.au/ | 397ms | 14ms | 1ms | 3rd |
| https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-commons-core-js.deaf12db4cf945a0ca13edc97fde1c59.js | 80ms | 73ms | 7ms | 3rd |
| https://www.sydney.edu.au/etc.clientlibs/core/wcm/components/commons/datalayer/v1/clientlibs/core.wcm.components.commons.datalayer.v1.26e7b73e6dfd6225be931b9e9b1e405d.js | 63ms | 54ms | 3ms | 3rd |
FJS BundlesAction20 scripts, 718 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-chunk-all-components-frontend-svelte-js.b9124dec.js | 256 KB | 242 KB (95%) | ✓ | 3rd |
| https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-search.a6e2a76740ba945a80caac9d44ea5e22.js | 216 KB | 166 KB (77%) | ✗ | 3rd |
| https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-js.982a02b02f679df8eafac1b6a6e4fc85.js | 219 KB | 154 KB (71%) | ✓ | 3rd |
| https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js | 259 KB | 118 KB (46%) | ✓ | 3rd |
| https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/launch-a9ab0e6066cc.min.js | 141 KB | 38 KB (27%) | ✓ | 3rd |
| https://static.cloud.coveo.com/atomic/v3.13/p-5925f187.js | 9 KB | — | ✓ | 3rd |
| https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/1b92f2c336d5/RCea9381b0ac404a00a8238e248fa1f4ef-source.min.js | 0 KB | — | ✓ | 3rd |
| https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-commons-core-js.deaf12db4cf945a0ca13edc97fde1c59.js | 18 KB | — | ✗ | 3rd |
| https://www.sydney.edu.au/etc.clientlibs/core/wcm/components/commons/datalayer/v1/clientlibs/core.wcm.components.commons.datalayer.v1.26e7b73e6dfd6225be931b9e9b1e405d.js | 14 KB | — | ✓ | 3rd |
| https://assets.adobedtm.com/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasurement.min.js | 13 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
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 InventoryAction82 resources · 2.5 MB · 718 KB savings availableFIX
~717.7 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 82 resources | 2.5 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction11 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.
Performance issues directly impact user engagement and conversion rates.
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 Loading5 fonts (155 KB)PASS
Web fonts
5
155 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
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)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints4 hints, 0 missing preconnectsPASS
Current Resource Hints
4 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
Network Waterfall82 requests over 4943msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.sydney.edu.au www.sydney.edu.au | Other | 712ms | 219 KB | 71% | A$12/mo | Costly |
Unattributable Unattributable | Other | 625ms | 0 KB | — | A$11/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 561ms | 141 KB | 27% | A$10/mo | Costly |
www.sydney.edu.au www.sydney.edu.au | Other | 534ms | 256 KB | 95% | A$9/mo | Costly |
cdn.ketchjs.com cdn.ketchjs.com | Other | 465ms | 259 KB | 46% | A$8/mo | Costly |
www.sydney.edu.au www.sydney.edu.au | Other | 397ms | 10 KB | — | A$7/mo | Costly |
www.sydney.edu.au www.sydney.edu.au | Other | 80ms | 18 KB | — | A$1/mo | Optional |
www.sydney.edu.au www.sydney.edu.au | Other | 63ms | 14 KB | — | A$1/mo | Optional |
These scripts may cost more than they're worth
- www.sydney.edu.au adds 712ms and costs ~A$12/month
- Unattributable adds 625ms and costs ~A$11/month
- assets.adobedtm.com adds 561ms and costs ~A$10/month
- www.sydney.edu.au adds 534ms and costs ~A$9/month
- cdn.ketchjs.com adds 465ms and costs ~A$8/month
- www.sydney.edu.au adds 397ms and costs ~A$7/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.sydney.edu.au takes 712ms 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
71% of www.sydney.edu.au'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
Unattributable takes 625ms 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
assets.adobedtm.com takes 561ms 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.sydney.edu.au takes 534ms 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
95% of www.sydney.edu.au'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
cdn.ketchjs.com takes 465ms 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.sydney.edu.au takes 397ms 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