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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
71
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
66
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

2.72 s

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

3.06 s

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

30 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.002

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

3.62 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.

6.16 s

Page Load Progression

643 ms
1.3 s
1.9 s
2.6 s
3.2 s
3.9 s
4.5 s
5.1 s
Checks
15
5 PASS 3 REVIEW 5 FIX
D
Page Weight Budget
Action
2.4 MB transferred, 84 requests
FIX
2.4 MB transferred, 84 requests
Info::
Page weighs 8.5 MB (2.4 MB transferred)
Warning::
JavaScript is 1.2 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.2 MB
Info::
84 HTTP requests
Info::
Estimated 0.51 g CO2 per page load
2.4 MB / 2.4 MB budget
2.4 MB transferred
84 requests
0.51 g CO2 per page load
JavaScript 1.2 MiB 48%
Images 882.1 KiB 35%
Fonts 155.0 KiB 6%
Other 152.7 KiB 6%
CSS 84.7 KiB 3%
HTML 12.7 KiB 1%
Other 2.6 KiB 0%
Other 2.4 KiB 0%
Other 354 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.4 MiB of 2.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
20 scripts, 712 KB unused
FIX
20 scripts, 712 KB unused
Warning::
https://www.sydney.edu.au/etc.clientlibs/corporate...: 240 KB unused (94%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.sydney.edu.au/etc.clientlibs/corporate...: 165 KB unused (77%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.sydney.edu.au/etc.clientlibs/corporate...: unminified — 48 KB could be saved
Warning::
https://www.sydney.edu.au/etc.clientlibs/corporate...: 151 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 118 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a...: 38 KB unused (27%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 712 KB
712 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-chunk-all-components-frontend-svelte-js.b9124dec.js255 KB240 KB (94%)✓3rd
https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-search.a6e2a76740ba945a80caac9d44ea5e22.js215 KB165 KB (77%)✗3rd
https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-js.982a02b02f679df8eafac1b6a6e4fc85.js218 KB151 KB (69%)✓3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js259 KB118 KB (46%)✓3rd
https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/launch-a9ab0e6066cc.min.js141 KB38 KB (27%)✓3rd
https://sanalytics.sydney.edu.au/id?d_visid_ver=5.5.0&d_fieldgroup=A&mcorgid=35B46472540D9EE20A4C98A6%40AdobeOrg&mid=34462723611411644102217255327299034008&ts=17768967020740 KB—✓3rd
https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/1b92f2c336d5/RCea9381b0ac404a00a8238e248fa1f4ef-source.min.js0 KB—✓3rd
https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-commons-core-js.deaf12db4cf945a0ca13edc97fde1c59.js18 KB—✗3rd
https://www.sydney.edu.au/etc.clientlibs/core/wcm/components/commons/datalayer/v1/clientlibs/core.wcm.components.commons.datalayer.v1.26e7b73e6dfd6225be931b9e9b1e405d.js14 KB—✓3rd
https://assets.adobedtm.com/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasurement.min.js13 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

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

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

F
Page Weight Inventory
Action
84 resources · 2.4 MB · 712 KB savings available
FIX
84 resources · 2.4 MB · 712 KB savings available
Warning::
Page weight 1.4 MB over 1MB target
Got: 2.4 MB Expected: ≤ 1 MB
Info::
~712 KB of savings available
Warning::
83 third-party resources (100% of weight)
Info::
4 resources over 200KB
84 resources · 2.4 MiB · 83 third-party 1.4 MiB over 1MB target
JavaScript 48% · 1.2 MiB
Image 36% · 907.8 KiB
Font 6% · 155.0 KiB
Other 5% · 131.7 KiB
CSS 3% · 84.7 KiB
Document 1% · 12.9 KiB

~712.4 KiB of savings available

Remove unused JavaScript: 712.4 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

C
Image Optimization
Action
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://www.sydney.edu.au/content/dam/icons/logos/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://global.ketchcdn.com/web/v2/assetsv1/orgs/u... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 882 KB
0 oversized -0 KB
12 legacy format
3 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

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

B
JS Execution Cost
872ms total JS execution
REVIEW
872ms total JS execution
Info::
https://www.sydney.edu.au/etc.clientlibs/corporate...: 211ms CPU time
Info::
Unattributable: 196ms CPU time
Info::
https://www.sydney.edu.au/etc.clientlibs/corporate...: 147ms CPU time
Info::
https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a...: 120ms CPU time
Info::
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 111ms CPU time
Warning::
Third-party scripts: 872ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Other 19% Script Parsing & Compilation 11% Style & Layout 8% Parse HTML & CSS 4%
ScriptTotalScriptingParse/CompileParty
https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-js.982a02b02f679df8eafac1b6a6e4fc85.js211ms133ms17ms3rd
Unattributable196ms45ms0ms3rd
https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-chunk-all-components-frontend-svelte-js.b9124dec.js147ms95ms33ms3rd
https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/launch-a9ab0e6066cc.min.js120ms97ms15ms3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js111ms78ms28ms3rd
https://www.sydney.edu.au/88ms3ms0ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
5 fonts (155 KB)
PASS
5 fonts (155 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

155 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.7 s LCP 3.1 shttps://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/Apercu-Regular-Web.woff2Apercu-Regular-Web.woff2 https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/Apercu-Regular-Web.woff2 — 27.3 KiB — 318 ms — font-display: swaphttps://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/Apercu-Medium-Web.woff2Apercu-Medium-Web.woff2 https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/Apercu-Medium-Web.woff2 — 28.4 KiB — 304 ms — font-display: swaphttps://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/LyonDisplayLF-Regular-Web.woff2LyonDisplayLF-Regular-W... https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/LyonDisplayLF-Regular-Web.woff2 — 33.0 KiB — 322 ms — font-display: swaphttps://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/LyonDisplayLF-RegularItalic-Web.woff2LyonDisplayLF-RegularIt... https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/LyonDisplayLF-RegularItalic-Web.woff2 — 51.1 KiB — 366 ms — font-display: swaphttps://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/Apercu-Mono-Web.woff2Apercu-Mono-Web.woff2 https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/Apercu-Mono-Web.woff2 — 15.2 KiB — 305 ms — font-display: swap
Apercu-Regular-Web.woff2 woff2 swap
Size 27 KB
Load time 318 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
Apercu-Medium-Web.woff2 woff2 swap
Size 28 KB
Load time 304 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
LyonDisplayLF-Regular-W... woff2 swap
Size 33 KB
Load time 322 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
LyonDisplayLF-RegularIt... woff2 swap
Size 51 KB
Load time 366 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
Apercu-Mono-Web.woff2 woff2 swap
Size 15 KB
Load time 305 ms
Start 4.0 s
Risk FOUT — text flashes from fallback to web font
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 Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
84 requests over 4739ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 2.7 s LCP 3.1 shttps://usyd.edu.au// https://usyd.edu.au/ — 301 — 227 B — 816 ms — http/1.1https://www.sydney.edu.au/www.sydney.edu.au/ https://www.sydney.edu.au/ — 200 — 9.5 KiB — 340 ms — h3https://rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/rum-standalone.jsrum.hlx.page/.rum/@adobe/helix-rum-... https://rum.hlx.page/.rum/@adobe/helix-rum-js@%5E2/dist/rum-standalone.js — 200 — 2.8 KiB — 31 ms — h2https://www.sydney.edu.au/content/dam/corporate/ex/images/hero-crop/2026/marine_student_home_page_do_not_reuse.jpg/jcr:content/renditions/cq5dam.web.800.382.2x.jpegwww.sydney.edu.au/content/dam/corpo... https://www.sydney.edu.au/content/dam/corporate/ex/images/hero-crop/2026/marine_student_home_page_do_not_reuse.jpg/jcr:content/renditions/cq5dam.web.800.382.2x.jpeg — 200 — 92.1 KiB — 368 ms — h3https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/launch-a9ab0e6066cc.min.jsassets.adobedtm.com/84fa4ed6cd2d/93... https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/launch-a9ab0e6066cc.min.js — 200 — 140.9 KiB — 126 ms — h2https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-js.982a02b02f679df8eafac1b6a6e4fc85.jswww.sydney.edu.au/etc.clientlibs/co... https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-js.982a02b02f679df8eafac1b6a6e4fc85.js — 200 — 218.3 KiB — 530 ms — h3https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-css.a21205c61b92636aae5dea0707061ed1.csswww.sydney.edu.au/etc.clientlibs/co... https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-css.a21205c61b92636aae5dea0707061ed1.css — 200 — 78.5 KiB — 434 ms — h3https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-search.d63e01a6c5efe46c3b134e8f8e34529f.csswww.sydney.edu.au/etc.clientlibs/co... https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-search.d63e01a6c5efe46c3b134e8f8e34529f.css — 200 — 6.2 KiB — 321 ms — h3https://www.sydney.edu.au/content/dam/icons/logos/logo-usyd-dark.svgwww.sydney.edu.au/content/dam/icons... https://www.sydney.edu.au/content/dam/icons/logos/logo-usyd-dark.svg — 200 — 9.1 KiB — 316 ms — h3https://static.cloud.coveo.com/atomic/v3.13/atomic.esm.jsstatic.cloud.coveo.com/atomic/v3.13... https://static.cloud.coveo.com/atomic/v3.13/atomic.esm.js — 200 — 8.3 KiB — 57 ms — h2https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-search.a6e2a76740ba945a80caac9d44ea5e22.jswww.sydney.edu.au/etc.clientlibs/co... https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-search.a6e2a76740ba945a80caac9d44ea5e22.js — 200 — 215.4 KiB — 372 ms — h3https://dpm.demdex.net/id?d_visid_ver=5.5.0&d_fieldgroup=MC&d_rtbd=json&d_ver=2&d_orgid=35B46472540D9EE20A4C98A6%40AdobeOrg&d_nsid=0&ts=1776896701930dpm.demdex.net/id?d_visid_ver=5.5.0... https://dpm.demdex.net/id?d_visid_ver=5.5.0&d_fieldgroup=MC&d_rtbd=json&d_ver=2&d_orgid=35B46472540D9EE20A4C98A6%40AdobeOrg&d_nsid=0&ts=1776896701930 — 200 — 1.5 KiB — 138 ms — h2https://sanalytics.sydney.edu.au/id?d_visid_ver=5.5.0&d_fieldgroup=A&mcorgid=35B46472540D9EE20A4C98A6%40AdobeOrg&mid=34462723611411644102217255327299034008&ts=1776896702074sanalytics.sydney.edu.au/id?d_visid... https://sanalytics.sydney.edu.au/id?d_visid_ver=5.5.0&d_fieldgroup=A&mcorgid=35B46472540D9EE20A4C98A6%40AdobeOrg&mid=34462723611411644102217255327299034008&ts=1776896702074 — 200 — 459 B — 64 ms — h2https://www.sydney.edu.au/etc.clientlibs/core/wcm/components/commons/site/clientlibs/container.027d01df25f17066242db969c9bf2ade.jswww.sydney.edu.au/etc.clientlibs/co... https://www.sydney.edu.au/etc.clientlibs/core/wcm/components/commons/site/clientlibs/container.027d01df25f17066242db969c9bf2ade.js — 200 — 2.2 KiB — 329 ms — h3https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-commons-core-js.deaf12db4cf945a0ca13edc97fde1c59.jswww.sydney.edu.au/etc.clientlibs/co... https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/corporate-commons-core-js.deaf12db4cf945a0ca13edc97fde1c59.js — 200 — 18.1 KiB — 315 ms — h3https://www.sydney.edu.au/etc.clientlibs/core/wcm/components/commons/datalayer/v1/clientlibs/core.wcm.components.commons.datalayer.v1.26e7b73e6dfd6225be931b9e9b1e405d.jswww.sydney.edu.au/etc.clientlibs/co... https://www.sydney.edu.au/etc.clientlibs/core/wcm/components/commons/datalayer/v1/clientlibs/core.wcm.components.commons.datalayer.v1.26e7b73e6dfd6225be931b9e9b1e405d.js — 200 — 13.8 KiB — 317 ms — h3https://assets.adobedtm.com/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasurement.min.jsassets.adobedtm.com/extensions/EP31... https://assets.adobedtm.com/extensions/EP31dbb9c60e404ba1aa6e746d49be6f29/AppMeasurement.min.js — 200 — 13.0 KiB — 4 ms — h2https://cm.everesttech.net/cm/dd?d_uuid=27995665295097365631714980166575374993cm.everesttech.net/cm/dd?d_uuid=279... https://cm.everesttech.net/cm/dd?d_uuid=27995665295097365631714980166575374993 — 302 — 517 B — 159 ms — http/1.1https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/Apercu-Regular-Web.woff2www.sydney.edu.au/etc.clientlibs/co... https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/foundation/resources/corporate-frontend-svelte/corporate/assets/fonts/Apercu-Regular-Web.woff2 — 200 — 27.3 KiB — 318 ms — 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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 872ms · 883KB · A$15/mo
www.sydney.edu.au
Other
Costly
Execution 211ms
Transfer 218 KB
Unused 69%
Monthly Cost A$4/mo
Unattributable
Other
Optional
Execution 196ms
Transfer 0 KB
Monthly Cost A$3/mo
www.sydney.edu.au
Other
Optional
Execution 147ms
Transfer 255 KB
Unused 94%
Monthly Cost A$3/mo
assets.adobedtm.com
Other
Optional
Execution 120ms
Transfer 141 KB
Unused 27%
Monthly Cost A$2/mo
cdn.ketchjs.com
Other
Optional
Execution 111ms
Transfer 259 KB
Unused 46%
Monthly Cost A$2/mo
www.sydney.edu.au
Other
Optional
Execution 88ms
Transfer 9 KB
Monthly Cost A$2/mo

These scripts may cost more than they're worth

  • www.sydney.edu.au adds 211ms and costs ~A$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.sydney.edu.au takes 211ms 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

69% of www.sydney.edu.au'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

94% of www.sydney.edu.au'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.

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