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https://vic.gov.au

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
31
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

5.25 s

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

10.94 s

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

1.65 s

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

0.004

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

8.76 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.

17.31 s

Page Load Progression

551 ms
1.1 s
1.7 s
2.2 s
2.8 s
3.3 s
3.9 s
4.4 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
3.3 MB transferred, 79 requests
FIX
3.3 MB transferred, 79 requests
Warning::
Page weighs 6.7 MB (3.3 MB transferred)
Warning::
JavaScript is 1.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.6 MB
Warning::
Images are 1.5 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.5 MB
Info::
79 HTTP requests
Info::
Estimated 0.70 g CO2 per page load
3.3 MB / 2.4 MB budget
3.3 MB transferred
79 requests
0.70 g CO2 per page load
JavaScript 1.6 MiB 49%
Images 1.5 MiB 44%
CSS 109.4 KiB 3%
HTML 80.9 KiB 2%
Fonts 51.8 KiB 2%
Other 6.9 KiB 0%
Other 5.3 KiB 0%
Other 1.1 KiB 0%
Other 558 B 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

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

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 (3.3 MiB of 3.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4694ms total JS execution
FIX
4694ms total JS execution
Warning::
Unattributable: 1173ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KF8...: 1022ms CPU time
Warning::
https://www.vic.gov.au/: 867ms CPU time
Warning::
https://www.vic.gov.au/_nuxt/B9HF065p.js: 721ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-DPWD...: 474ms CPU time
Warning::
Third-party scripts: 4694ms (100% of total)

Main Thread Breakdown

Script Evaluation 60% Other 24% Style & Layout 5% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
Unattributable1173ms206ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KF8NCW21022ms922ms66ms3rd
https://www.vic.gov.au/867ms328ms2ms3rd
https://www.vic.gov.au/_nuxt/B9HF065p.js721ms661ms17ms3rd
https://www.googletagmanager.com/gtag/js?id=G-DPWDSMVDMQ&cx=c&gtm=4e64h1474ms354ms66ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js249ms204ms10ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-T5283GW188ms130ms54ms3rd
F
JS Bundles
Action
41 scripts, 925 KB unused
FIX
41 scripts, 925 KB unused
Warning::
https://www.vic.gov.au/_nuxt/B9HF065p.js: 737 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-T52...: 68 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-DPWD...: 65 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KF8...: 55 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 925 KB
925 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.vic.gov.au/_nuxt/B9HF065p.js983 KB737 KB (75%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-T5283GW149 KB68 KB (45%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-DPWDSMVDMQ&cx=c&gtm=4e64h1164 KB65 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KF8NCW2144 KB55 KB (38%)✓3rd
https://www.vic.gov.au/_nuxt/DBbAqbIm.js5 KB—✓3rd
https://www.clarity.ms/tag/s0qpm61dlm?ref=gtm1 KB—✓3rd
https://www.vic.gov.au/_nuxt/DIC3yRQe.js5 KB—✓3rd
https://www.vic.gov.au/_nuxt/BZRe558B.js5 KB—✓3rd
https://www.vic.gov.au/_nuxt/QT9raxv8.js5 KB—✓3rd
https://www.vic.gov.au/_nuxt/B5P2Evt8.js5 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

F
Page Weight Inventory
Action
79 resources · 3.3 MB · 925 KB savings available
FIX
79 resources · 3.3 MB · 925 KB savings available
Warning::
Page weight 2.3 MB over 1MB target
Got: 3.3 MB Expected: ≤ 1 MB
Info::
~925 KB of savings available
Warning::
78 third-party resources (100% of weight)
Info::
3 resources over 200KB
79 resources · 3.3 MiB · 78 third-party 2.3 MiB over 1MB target
JavaScript 49% · 1.6 MiB
Image 44% · 1.5 MiB
CSS 3% · 109.4 KiB
Document 2% · 81.1 KiB
Font 2% · 51.8 KiB
Other 0% · 8.3 KiB

~924.9 KiB of savings available

Remove unused JavaScript: 924.9 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.

B
Image Optimization
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Info::
All images are well-optimized
10 images 1.5 MB
0 oversized -0 KB
10 legacy format
0 missing dimensions CLS risk
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
2 fonts (52 KB)
PASS
2 fonts (52 KB)
Info::
2 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

2

52 KB total

Render-blocking

0

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 5.3 s LCP 10.9 shttps://www.vic.gov.au/assets/fonts/VIC-Regular.woff2VIC-Regular.woff2 https://www.vic.gov.au/assets/fonts/VIC-Regular.woff2 — 25.8 KiB — 1.0 s — font-display: swaphttps://www.vic.gov.au/assets/fonts/VIC-Bold.woff2VIC-Bold.woff2 https://www.vic.gov.au/assets/fonts/VIC-Bold.woff2 — 26.0 KiB — 1.0 s — font-display: swap
VIC-Regular.woff2 woff2 swap
Size 26 KB
Load time 1.0 s
Start 2.9 s
Risk FOUT — text flashes from fallback to web font
VIC-Bold.woff2 woff2 swap
Size 26 KB
Load time 1.0 s
Start 2.9 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
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
79 requests over 8184ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 5.3 s LCP 10.9 shttps://vic.gov.au// https://vic.gov.au/ — 301 — 257 B — 572 ms — h2https://www.vic.gov.au/www.vic.gov.au/ https://www.vic.gov.au/ — 200 — 80.9 KiB — 1.9 s — h2https://www.vic.gov.au/_nuxt/entry.LzAMgtZM.csswww.vic.gov.au/_nuxt/entry.LzAMgtZM... https://www.vic.gov.au/_nuxt/entry.LzAMgtZM.css — 200 — 52.8 KiB — 782 ms — h2https://www.vic.gov.au/_nuxt/_...CDfFKpYe.csswww.vic.gov.au/_nuxt/_...CDfFKpYe.c... https://www.vic.gov.au/_nuxt/_...CDfFKpYe.css — 200 — 5.1 KiB — 417 ms — h2https://www.vic.gov.au/_nuxt/RplVerticalNav.DsHne-Hs.csswww.vic.gov.au/_nuxt/RplVerticalNav... https://www.vic.gov.au/_nuxt/RplVerticalNav.DsHne-Hs.css — 200 — 5.4 KiB — 733 ms — h2https://www.vic.gov.au/_nuxt/RplSidebarComponent.BkEnZ_6A.csswww.vic.gov.au/_nuxt/RplSidebarComp... https://www.vic.gov.au/_nuxt/RplSidebarComponent.BkEnZ_6A.css — 200 — 4.9 KiB — 735 ms — h2https://www.vic.gov.au/_nuxt/RplContactUs.YCUyYuyq.csswww.vic.gov.au/_nuxt/RplContactUs.Y... https://www.vic.gov.au/_nuxt/RplContactUs.YCUyYuyq.css — 200 — 5.1 KiB — 741 ms — h2https://www.vic.gov.au/_nuxt/TideDynamicComponents.CNT9mp8q.csswww.vic.gov.au/_nuxt/TideDynamicCom... https://www.vic.gov.au/_nuxt/TideDynamicComponents.CNT9mp8q.css — 200 — 5.0 KiB — 753 ms — h2https://www.vic.gov.au/_nuxt/RplPageComponent.ClhWAxMq.csswww.vic.gov.au/_nuxt/RplPageCompone... https://www.vic.gov.au/_nuxt/RplPageComponent.ClhWAxMq.css — 200 — 4.9 KiB — 740 ms — h2https://www.vic.gov.au/_nuxt/RplCampaignBanner.BKadob_5.csswww.vic.gov.au/_nuxt/RplCampaignBan... https://www.vic.gov.au/_nuxt/RplCampaignBanner.BKadob_5.css — 200 — 5.4 KiB — 750 ms — h2https://www.vic.gov.au/_nuxt/RplInPageNavigation.BS8SGASN.csswww.vic.gov.au/_nuxt/RplInPageNavig... https://www.vic.gov.au/_nuxt/RplInPageNavigation.BS8SGASN.css — 200 — 5.2 KiB — 735 ms — h2https://www.vic.gov.au/_nuxt/RplTag.BHtonKI0.csswww.vic.gov.au/_nuxt/RplTag.BHtonKI... https://www.vic.gov.au/_nuxt/RplTag.BHtonKI0.css — 200 — 4.9 KiB — 749 ms — h2https://www.vic.gov.au/_nuxt/RplCard.DUf5wzap.csswww.vic.gov.au/_nuxt/RplCard.DUf5wz... https://www.vic.gov.au/_nuxt/RplCard.DUf5wzap.css — 200 — 5.9 KiB — 741 ms — h2https://www.vic.gov.au/_nuxt/B9HF065p.jswww.vic.gov.au/_nuxt/B9HF065p.js https://www.vic.gov.au/_nuxt/B9HF065p.js — 200 — 982.8 KiB — 1.8 s — h2data:application/manifest+json,%7B%22id%22%3A%22https%3A%2F%2Fwww.vic.gov.au%22%2C%22name%22%3A%22v…data:application/manifest+json,%7B%... data:application/manifest+json,%7B%22id%22%3A%22https%3A%2F%2Fwww.vic.gov.au%22%2C%22name%22%3A%22v… — 200 — 0 B — 0 ms — datahttps://www.vic.gov.au/sites/default/files/2026-03/free-public-transport-in-victoria-image-1440x960.jpg?width=1536www.vic.gov.au/sites/default/files/... https://www.vic.gov.au/sites/default/files/2026-03/free-public-transport-in-victoria-image-1440x960.jpg?width=1536 — 200 — 79.8 KiB — 1.4 s — h2https://www.vic.gov.au/sites/default/files/2026-03/FuelSupplyTileImage.jpg?width=1536www.vic.gov.au/sites/default/files/... https://www.vic.gov.au/sites/default/files/2026-03/FuelSupplyTileImage.jpg?width=1536 — 200 — 154.3 KiB — 1.4 s — h2https://www.vic.gov.au/sites/default/files/2026-04/DPC5215_PSO_LFOOH_1280x720px_D1.jpg?width=1536www.vic.gov.au/sites/default/files/... https://www.vic.gov.au/sites/default/files/2026-04/DPC5215_PSO_LFOOH_1280x720px_D1.jpg?width=1536 — 200 — 111.0 KiB — 1.0 s — h2https://www.vic.gov.au/sites/default/files/2025-06/DPC2570_COL_URL-share-graphic_818X496.png?width=1536www.vic.gov.au/sites/default/files/... https://www.vic.gov.au/sites/default/files/2025-06/DPC2570_COL_URL-share-graphic_818X496.png?width=1536 — 200 — 462.3 KiB — 1.4 s — h2https://www.vic.gov.au/sites/default/files/2026-04/nurse_feature.jpg?width=1536www.vic.gov.au/sites/default/files/... https://www.vic.gov.au/sites/default/files/2026-04/nurse_feature.jpg?width=1536 — 200 — 135.2 KiB — 1.8 s — h2https://www.vic.gov.au/sites/default/files/2024-04/14202-TSHE-TAFE-Vic-Eligibility_Web-banner-Image_feature.jpg?width=1536www.vic.gov.au/sites/default/files/... https://www.vic.gov.au/sites/default/files/2024-04/14202-TSHE-TAFE-Vic-Eligibility_Web-banner-Image_feature.jpg?width=1536 — 200 — 110.5 KiB — 1.4 s — h2https://www.vic.gov.au/sites/default/files/2025-12/DPC2513-PSO-campaign_share-graphic_818X496.png?width=1536www.vic.gov.au/sites/default/files/... https://www.vic.gov.au/sites/default/files/2025-12/DPC2513-PSO-campaign_share-graphic_818X496.png?width=1536 — 200 — 330.0 KiB — 1.4 s — h2https://www.vic.gov.au/sites/default/files/2024-11/urgent-care-landing-page-banner-800-x-400-v1.jpg?width=1536www.vic.gov.au/sites/default/files/... https://www.vic.gov.au/sites/default/files/2024-11/urgent-care-landing-page-banner-800-x-400-v1.jpg?width=1536 — 200 — 105.4 KiB — 1.8 s — h2https://www.vic.gov.au/assets/fonts/VIC-Regular.woff2www.vic.gov.au/assets/fonts/VIC-Reg... https://www.vic.gov.au/assets/fonts/VIC-Regular.woff2 — 200 — 25.8 KiB — 1.0 s — h2https://www.vic.gov.au/assets/fonts/VIC-Bold.woff2www.vic.gov.au/assets/fonts/VIC-Bol... https://www.vic.gov.au/assets/fonts/VIC-Bold.woff2 — 200 — 26.0 KiB — 1.0 s — h2https://www.vic.gov.au/_nuxt/Bkap1f9L.jswww.vic.gov.au/_nuxt/Bkap1f9L.js https://www.vic.gov.au/_nuxt/Bkap1f9L.js — 200 — 8.3 KiB — 507 ms — h2https://www.vic.gov.au/_nuxt/D7uQIiNH.jswww.vic.gov.au/_nuxt/D7uQIiNH.js https://www.vic.gov.au/_nuxt/D7uQIiNH.js — 200 — 6.3 KiB — 494 ms — h2https://www.vic.gov.au/_nuxt/C3Tx6s5e.jswww.vic.gov.au/_nuxt/C3Tx6s5e.js https://www.vic.gov.au/_nuxt/C3Tx6s5e.js — 200 — 4.9 KiB — 501 ms — h2https://www.vic.gov.au/_nuxt/QT9raxv8.jswww.vic.gov.au/_nuxt/QT9raxv8.js https://www.vic.gov.au/_nuxt/QT9raxv8.js — 200 — 5.0 KiB — 497 ms — h2https://www.vic.gov.au/_nuxt/BDdLbSrc.jswww.vic.gov.au/_nuxt/BDdLbSrc.js https://www.vic.gov.au/_nuxt/BDdLbSrc.js — 200 — 5.4 KiB — 500 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 5.3 s LCP 10.9 shttps://vic.gov.au// https://vic.gov.au/ — 301 — 257 B — 572 ms — h2https://www.vic.gov.au/www.vic.gov.au/ https://www.vic.gov.au/ — 200 — 80.9 KiB — 1.9 s — h2https://www.vic.gov.au/_nuxt/entry.LzAMgtZM.csswww.vic.gov.au/_nuxt/entry.LzAMgtZM... https://www.vic.gov.au/_nuxt/entry.LzAMgtZM.css — 200 — 52.8 KiB — 782 ms — h2https://www.vic.gov.au/_nuxt/_...CDfFKpYe.csswww.vic.gov.au/_nuxt/_...CDfFKpYe.c... https://www.vic.gov.au/_nuxt/_...CDfFKpYe.css — 200 — 5.1 KiB — 417 ms — h2https://www.vic.gov.au/_nuxt/RplVerticalNav.DsHne-Hs.csswww.vic.gov.au/_nuxt/RplVerticalNav... https://www.vic.gov.au/_nuxt/RplVerticalNav.DsHne-Hs.css — 200 — 5.4 KiB — 733 ms — h2https://www.vic.gov.au/_nuxt/RplSidebarComponent.BkEnZ_6A.csswww.vic.gov.au/_nuxt/RplSidebarComp... https://www.vic.gov.au/_nuxt/RplSidebarComponent.BkEnZ_6A.css — 200 — 4.9 KiB — 735 ms — h2https://www.vic.gov.au/_nuxt/RplContactUs.YCUyYuyq.csswww.vic.gov.au/_nuxt/RplContactUs.Y... https://www.vic.gov.au/_nuxt/RplContactUs.YCUyYuyq.css — 200 — 5.1 KiB — 741 ms — h2https://www.vic.gov.au/_nuxt/TideDynamicComponents.CNT9mp8q.csswww.vic.gov.au/_nuxt/TideDynamicCom... https://www.vic.gov.au/_nuxt/TideDynamicComponents.CNT9mp8q.css — 200 — 5.0 KiB — 753 ms — h2https://www.vic.gov.au/_nuxt/RplPageComponent.ClhWAxMq.csswww.vic.gov.au/_nuxt/RplPageCompone... https://www.vic.gov.au/_nuxt/RplPageComponent.ClhWAxMq.css — 200 — 4.9 KiB — 740 ms — h2https://www.vic.gov.au/_nuxt/RplCampaignBanner.BKadob_5.csswww.vic.gov.au/_nuxt/RplCampaignBan... https://www.vic.gov.au/_nuxt/RplCampaignBanner.BKadob_5.css — 200 — 5.4 KiB — 750 ms — h2https://www.vic.gov.au/_nuxt/RplInPageNavigation.BS8SGASN.csswww.vic.gov.au/_nuxt/RplInPageNavig... https://www.vic.gov.au/_nuxt/RplInPageNavigation.BS8SGASN.css — 200 — 5.2 KiB — 735 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
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Unattributable
Other
Costly
Execution 1173ms
Transfer 0 KB
Monthly Cost A$20/mo
Google Tag Manager
Tag Manager
Costly
Execution 1022ms
Transfer 144 KB
Unused 38%
Monthly Cost A$18/mo
www.vic.gov.au
Other
Costly
Execution 867ms
Transfer 81 KB
Monthly Cost A$15/mo
www.vic.gov.au
Other
Costly
Execution 721ms
Transfer 983 KB
Unused 75%
Monthly Cost A$12/mo
Google Tag Manager
Tag Manager
Costly
Execution 474ms
Transfer 164 KB
Unused 40%
Monthly Cost A$8/mo
Microsoft Clarity
Session Replay
Costly
Execution 249ms
Transfer 26 KB
Monthly Cost A$4/mo
Google Tag Manager
Tag Manager
Optional
Execution 188ms
Transfer 149 KB
Unused 45%
Monthly Cost A$3/mo

These scripts may cost more than they're worth

  • Unattributable adds 1173ms and costs ~A$20/month
  • Google Tag Manager adds 1022ms and costs ~A$18/month
  • www.vic.gov.au adds 867ms and costs ~A$15/month
  • www.vic.gov.au adds 721ms and costs ~A$12/month
  • Google Tag Manager adds 474ms and costs ~A$8/month
  • Microsoft Clarity adds 249ms 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 1173ms 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

Google Tag Manager takes 1022ms 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.vic.gov.au takes 867ms 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.vic.gov.au takes 721ms 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

75% of www.vic.gov.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

Google Tag Manager takes 474ms 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

Microsoft Clarity takes 249ms 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

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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