Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

Best Practices

SEO

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

6.71 s

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

8.58 s

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

3.11 s

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.

10.29 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.

26.35 s

Page Load Progression

580 ms

1.2 s

1.7 s

2.3 s

2.9 s

3.5 s

4.1 s

4.6 s

Checks

7 PASS 2 REVIEW 6 FIX

Page Weight Budget

Action

3.6 MB transferred, 167 requests

FIX

3.6 MB transferred, 167 requests

Page weighs 12.0 MB (3.6 MB transferred)

JavaScript is 2.2 MB — consider code splitting or lazy loading

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

Got: 2.2 MB

167 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.75 g CO2 per page load

3.6 MB transferred

167 requests

0.75 g CO2 per page load

JavaScript 2.2 MiB 62%

Images 961.8 KiB 26%

Fonts 155.0 KiB 4%

Other 154.6 KiB 4%

CSS 85.1 KiB 2%

Other 23.1 KiB 1%

HTML 15.8 KiB 0%

Other 5.0 KiB 0%

Other 4.1 KiB 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Over budget

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (3.6 MiB of 3.6 MiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

JS Execution Cost

Action

10402ms total JS execution

FIX

10402ms total JS execution

Unattributable: 1913ms CPU time

https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a...: 1740ms CPU time

https://www.sydney.edu.au/etc.clientlibs/corporate...: 1273ms CPU time

https://www.sydney.edu.au/etc.clientlibs/corporate...: 1113ms CPU time

https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 708ms CPU time

Third-party scripts: 10402ms (100% of total)

Main Thread Breakdown

Script Evaluation 64% Other 14% Script Parsing & Compilation 11% Style & Layout 5% Parse HTML & CSS 3%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	1913ms	664ms	0ms	3rd
https://assets.adobedtm.com/84fa4ed6cd2d/93f43475a61e/launch-a9ab0e6066cc.min.js	1740ms	1497ms	121ms	3rd
https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-frontend-svelte-js.982a02b02f679df8eafac1b6a6e4fc85.js	1273ms	776ms	111ms	3rd
https://www.sydney.edu.au/etc.clientlibs/corporate-commons/clientlibs/wup-new-page-corporate-chunk-all-components-frontend-svelte-js.b9124dec.js	1113ms	710ms	256ms	3rd
https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketch-sdk.js	708ms	523ms	156ms	3rd
https://www.sydney.edu.au/	624ms	26ms	2ms	3rd
https://connect.facebook.net/en_US/fbevents.js	434ms	325ms	107ms	3rd
https://connect.facebook.net/signals/config/552355808300694?v=2.9.303&r=stable&domain=www.sydney.edu.au&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168	393ms	346ms	46ms	3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOA.js	289ms	236ms	50ms	3rd
https://sc-static.net/scevent.min.js	284ms	258ms	15ms	3rd

Showing top 10 of 24 scripts

JS Bundles

Action

59 scripts, 1.0 MB unused

FIX

59 scripts, 1.0 MB unused

https://www.sydney.edu.au/etc.clientlibs/corporate...: 242 KB unused (95%)

Consider code splitting or tree shaking to reduce unused code.

https://www.sydney.edu.au/etc.clientlibs/corporate...: 166 KB unused (77%)

Consider code splitting or tree shaking to reduce unused code.

https://www.sydney.edu.au/etc.clientlibs/corporate...: unminified — 48 KB could be saved

https://www.sydney.edu.au/etc.clientlibs/corporate...: 154 KB unused (71%)

Consider code splitting or tree shaking to reduce unused code.

https://cdn.ketchjs.com/ketchtag/stable/v2.12/ketc...: 117 KB unused (45%)

Consider code splitting or tree shaking to reduce unused code.

https://analytics.tiktok.com/i18n/pixel/static/mai...: 64 KB unused (54%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 1.0 MB

1046 KB unused JavaScript

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	257 KB	117 KB (45%)	✓	3rd
https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOA.js	118 KB	64 KB (54%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=DC-14331375	180 KB	62 KB (35%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=DC-15089914	129 KB	56 KB (44%)	✓	3rd
https://www.googletagmanager.com/gtag/js?id=AW-16460194664	138 KB	54 KB (39%)	✓	3rd
https://connect.facebook.net/signals/config/552355808300694?v=2.9.303&r=stable&domain=www.sydney.edu.au&hme=97937018cefade17726f0472876fc101316b2ce9008a35a6a5a7977d7436151a&ex_m=104%2C205%2C154%2C22%2C72%2C73%2C145%2C68%2C67%2C11%2C162%2C90%2C16%2C138%2C127%2C39%2C75%2C78%2C134%2C159%2C164%2C8%2C4%2C5%2C7%2C6%2C3%2C91%2C101%2C165%2C170%2C219%2C62%2C186%2C187%2C55%2C276%2C30%2C74%2C231%2C230%2C229%2C23%2C33%2C103%2C61%2C10%2C63%2C97%2C98%2C99%2C105%2C130%2C31%2C29%2C132%2C133%2C129%2C128%2C155%2C76%2C158%2C156%2C157%2C50%2C60%2C123%2C15%2C161%2C45%2C263%2C264%2C262%2C26%2C27%2C28%2C48%2C146%2C77%2C112%2C18%2C20%2C44%2C40%2C42%2C41%2C83%2C92%2C96%2C110%2C144%2C147%2C46%2C111%2C24%2C21%2C119%2C69%2C36%2C149%2C148%2C150%2C141%2C139%2C25%2C35%2C59%2C109%2C160%2C70%2C17%2C152%2C114%2C81%2C66%2C19%2C85%2C86%2C116%2C84%2C136%2C135%2C34%2C278%2C293%2C212%2C201%2C202%2C200%2C296%2C288%2C52%2C213%2C107%2C131%2C80%2C121%2C54%2C47%2C49%2C113%2C120%2C126%2C58%2C64%2C151%2C115%2C37%2C32%2C53%2C56%2C100%2C163%2C1%2C124%2C14%2C122%2C12%2C2%2C57%2C93%2C65%2C118%2C89%2C88%2C166%2C167%2C94%2C95%2C9%2C125%2C102%2C51%2C142%2C87%2C79%2C71%2C117%2C106%2C43%2C143%2C0%2C82%2C137%2C140%2C153%2C38%2C108%2C13%2C168	125 KB	36 KB (29%)	✓	3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js	57 KB	35 KB (62%)	✓	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

Page Weight Inventory

Action

167 resources · 3.6 MB · 1.0 MB savings available

FIX

167 resources · 3.6 MB · 1.0 MB savings available

Page weight 2.6 MB over 1MB target

Got: 3.6 MB Expected: ≤ 1 MB

~1.0 MB of savings available

166 third-party resources (100% of weight)

6 resources over 200KB

167 resources · 3.6 MiB · 166 third-party 2.6 MiB over 1MB target

JavaScript 62% · 2.2 MiB

Image 27% · 987.6 KiB

Other 4% · 160.3 KiB

Font 4% · 155.0 KiB

CSS 2% · 85.1 KiB

Document 0% · 16.1 KiB

~1.0 MiB of savings available

Remove unused JavaScript: 1.0 MiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

167 resources			3.6 MiB

HTTP Caching

Action

No cache headers

FIX

No cache headers

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.

Image Optimization

Action

24 images, 0 KB saveable

REVIEW

24 images, 0 KB saveable

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.

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.

is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

24 images 962 KB

0 oversized -0 KB

23 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.

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

All text resources are properly compressed.

A+

Font Loading

5 fonts (155 KB)

PASS

5 fonts (155 KB)

5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

155 KB total

Render-blocking

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

LyonDisplayLF-Regular-W... woff2 swap

Size 33 KB

Load time 228 ms

Start 1.2 s

Risk FOUT — text flashes from fallback to web font

Apercu-Regular-Web.woff2 woff2 swap

Size 27 KB

Load time 199 ms

Start 1.2 s

Risk FOUT — text flashes from fallback to web font

Apercu-Medium-Web.woff2 woff2 swap

Size 28 KB

Load time 189 ms

Start 1.3 s

Risk FOUT — text flashes from fallback to web font

LyonDisplayLF-RegularIt... woff2 swap

Size 51 KB

Load time 188 ms

Start 1.3 s

Risk FOUT — text flashes from fallback to web font

Apercu-Mono-Web.woff2 woff2 swap

Size 15 KB

Load time 179 ms

Start 2.8 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

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

4 hints, 0 missing preconnects

PASS

4 hints, 0 missing preconnects

Page uses 4 resource hint(s)

Current Resource Hints

preconnect

—

preload

dns-prefetch

prefetch

—

4 resource hints configured

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

Network Waterfall

167 requests over 4231ms

INFO

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 10402ms · 2123KB · A$180/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	1913ms	0 KB	—	A$33/mo	Costly
assets.adobedtm.com assets.adobedtm.com	Other	1740ms	141 KB	20%	A$30/mo	Costly
www.sydney.edu.au www.sydney.edu.au	Other	1273ms	219 KB	71%	A$22/mo	Costly
www.sydney.edu.au www.sydney.edu.au	Other	1113ms	256 KB	95%	A$19/mo	Costly
cdn.ketchjs.com cdn.ketchjs.com	Other	708ms	257 KB	45%	A$12/mo	Costly
www.sydney.edu.au www.sydney.edu.au	Other	624ms	10 KB	—	A$11/mo	Costly
Facebook Pixel connect.facebook.net	Advertising	434ms	97 KB	34%	A$8/mo	Costly
Facebook Pixel connect.facebook.net	Advertising	393ms	125 KB	29%	A$7/mo	Costly
analytics.tiktok.com analytics.tiktok.com	Other	289ms	118 KB	54%	A$5/mo	Costly
sc-static.net sc-static.net	Other	284ms	25 KB	—	A$5/mo	Costly
Hotjar script.hotjar.com	Session Replay	245ms	57 KB	62%	A$4/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	189ms	180 KB	35%	A$3/mo	Optional
Google Tag Manager www.googletagmanager.com	Tag Manager	159ms	129 KB	44%	A$3/mo	Optional
LinkedIn Insight snap.licdn.com	Advertising	156ms	19 KB	—	A$3/mo	Optional
www.sydney.edu.au www.sydney.edu.au	Other	145ms	18 KB	—	A$2/mo	Optional
Google Tag Manager www.googletagmanager.com	Tag Manager	119ms	138 KB	39%	A$2/mo	Optional
www.redditstatic.com www.redditstatic.com	Other	105ms	19 KB	—	A$2/mo	Optional
www.sydney.edu.au www.sydney.edu.au	Other	93ms	216 KB	77%	A$2/mo	Optional
www.sydney.edu.au www.sydney.edu.au	Other	83ms	18 KB	—	A$1/mo	Optional
www.sydney.edu.au www.sydney.edu.au	Other	82ms	14 KB	—	A$1/mo	Optional
hm.baidu.com hm.baidu.com	Other	81ms	13 KB	—	A$1/mo	Optional
Facebook Pixel connect.facebook.net	Advertising	67ms	16 KB	—	A$1/mo	Optional
assets.adobedtm.com assets.adobedtm.com	Other	55ms	1 KB	—	A$1/mo	Optional
analytics.tiktok.com analytics.tiktok.com	Other	54ms	40 KB	—	A$1/mo	Optional

Unattributable

Other

Costly

Execution 1913ms

Transfer 0 KB

Monthly Cost A$33/mo

assets.adobedtm.com

Other

Costly

Execution 1740ms

Transfer 141 KB

Unused 20%

Monthly Cost A$30/mo

www.sydney.edu.au

Other

Costly

Execution 1273ms

Transfer 219 KB

Unused 71%

Monthly Cost A$22/mo

www.sydney.edu.au

Other

Costly

Execution 1113ms

Transfer 256 KB

Unused 95%

Monthly Cost A$19/mo

cdn.ketchjs.com

Other

Costly

Execution 708ms

Transfer 257 KB

Unused 45%

Monthly Cost A$12/mo

www.sydney.edu.au

Other

Costly

Execution 624ms

Transfer 10 KB

Monthly Cost A$11/mo

Facebook Pixel

Advertising

Costly

Execution 434ms

Transfer 97 KB

Unused 34%

Monthly Cost A$8/mo

Facebook Pixel

Advertising

Costly

Execution 393ms

Transfer 125 KB

Unused 29%

Monthly Cost A$7/mo

analytics.tiktok.com

Other

Costly

Execution 289ms

Transfer 118 KB

Unused 54%

Monthly Cost A$5/mo

sc-static.net

Other

Costly

Execution 284ms

Transfer 25 KB

Monthly Cost A$5/mo

Hotjar

Session Replay

Costly

Execution 245ms

Transfer 57 KB

Unused 62%

Monthly Cost A$4/mo

Google Tag Manager

Tag Manager

Optional

Execution 189ms

Transfer 180 KB

Unused 35%

Monthly Cost A$3/mo

Google Tag Manager

Tag Manager

Optional

Execution 159ms

Transfer 129 KB

Unused 44%

Monthly Cost A$3/mo

LinkedIn Insight

Advertising

Optional

Execution 156ms

Transfer 19 KB

Monthly Cost A$3/mo

www.sydney.edu.au

Other

Optional

Execution 145ms

Transfer 18 KB

Monthly Cost A$2/mo

Google Tag Manager

Tag Manager

Optional

Execution 119ms

Transfer 138 KB

Unused 39%

Monthly Cost A$2/mo

www.redditstatic.com

Other

Optional

Execution 105ms

Transfer 19 KB

Monthly Cost A$2/mo

www.sydney.edu.au

Other

Optional

Execution 93ms

Transfer 216 KB

Unused 77%

Monthly Cost A$2/mo

www.sydney.edu.au

Other

Optional

Execution 83ms

Transfer 18 KB

Monthly Cost A$1/mo

www.sydney.edu.au

Other

Optional

Execution 82ms

Transfer 14 KB

Monthly Cost A$1/mo

hm.baidu.com

Other

Optional

Execution 81ms

Transfer 13 KB

Monthly Cost A$1/mo

Facebook Pixel

Advertising

Optional

Execution 67ms

Transfer 16 KB

Monthly Cost A$1/mo

assets.adobedtm.com

Other

Optional

Execution 55ms

Transfer 1 KB

Monthly Cost A$1/mo

analytics.tiktok.com

Other

Optional

Execution 54ms

Transfer 40 KB

Monthly Cost A$1/mo

These scripts may cost more than they're worth

Unattributable adds 1913ms and costs ~A$33/month
assets.adobedtm.com adds 1740ms and costs ~A$30/month
www.sydney.edu.au adds 1273ms and costs ~A$22/month
www.sydney.edu.au adds 1113ms and costs ~A$19/month
cdn.ketchjs.com adds 708ms and costs ~A$12/month
www.sydney.edu.au adds 624ms and costs ~A$11/month
Facebook Pixel adds 434ms and costs ~A$8/month
Facebook Pixel adds 393ms and costs ~A$7/month
analytics.tiktok.com adds 289ms and costs ~A$5/month
sc-static.net adds 284ms and costs ~A$5/month
Hotjar adds 245ms 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

Unattributable takes 1913ms 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

assets.adobedtm.com takes 1740ms 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

www.sydney.edu.au takes 1273ms 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

71% 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

www.sydney.edu.au takes 1113ms 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

95% 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

cdn.ketchjs.com takes 708ms 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

www.sydney.edu.au takes 624ms 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

Facebook Pixel takes 434ms 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

Facebook Pixel takes 393ms 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

analytics.tiktok.com takes 289ms 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

54% of analytics.tiktok.com'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

sc-static.net takes 284ms 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

Hotjar takes 245ms 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

62% of Hotjar'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

77% 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.