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.
11.21 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
59.05 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.94 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.
16.04 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.
62.02 s
Page Load Progression
FPage Weight BudgetAction11.3 MB transferred, 152 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
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
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 CostAction8548ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://us-south.watson-orchestrate.cloud.ibm.com/wxochat/static/js/app.9972a023.js | 1287ms | 1163ms | 120ms | 3rd |
| Unattributable | 995ms | 111ms | 0ms | 3rd |
| https://www.auckland.ac.nz/en.html | 770ms | 8ms | 2ms | 3rd |
| https://assets.adobedtm.com/8f0d8ca959df/1c5999aedcfa/launch-b026ed5e40af.min.js | 679ms | 616ms | 18ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-W9ZVGXV | 604ms | 494ms | 80ms | 3rd |
| https://uoa-assistant.auckland.ac.nz/build/assets/servicedesk.bundle.js | 538ms | 335ms | 202ms | 3rd |
| https://us-south.watson-orchestrate.cloud.ibm.com/wxochat/static/js/vendors.902b0a5e.js | 441ms | 83ms | 322ms | 3rd |
| https://analytics.tiktok.com/i18n/pixel/static/main.MWE0ZWQ3ZWQwOQ.js | 434ms | 265ms | 166ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-SJ5FRP7YTL&cx=c>m=4e64h1 | 305ms | 260ms | 42ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-48M2ES9DC2&cx=c>m=4e64h1 | 255ms | 208ms | 43ms | 3rd |
Showing top 10 of 27 scripts
FJS BundlesAction53 scripts, 4.1 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://uoa-assistant.auckland.ac.nz/build/assets/servicedesk.bundle.js | 2206 KB | 1342 KB (61%) | ✗ | 3rd |
| https://us-south.watson-orchestrate.cloud.ibm.com/wxochat/static/js/vendors.902b0a5e.js | 1116 KB | 807 KB (73%) | ✓ | 3rd |
| https://us-south.watson-orchestrate.cloud.ibm.com/wxochat/static/js/carbon-products-vendors.49b718a5.js | 547 KB | 512 KB (94%) | ✓ | 3rd |
| https://us-south.watson-orchestrate.cloud.ibm.com/wxochat/static/js/carbon-icons-vendors.b39373d5.js | 471 KB | 441 KB (94%) | ✓ | 3rd |
| https://us-south.watson-orchestrate.cloud.ibm.com/wxochat/static/js/app.9972a023.js | 453 KB | 179 KB (44%) | ✓ | 3rd |
| https://us-south.watson-orchestrate.cloud.ibm.com/wxochat/static/js/carbon-vendors.b26cddc4.js | 156 KB | 96 KB (61%) | ✓ | 3rd |
| https://uoa-assistant.auckland.ac.nz/build/p-74ee9601.entry.js | 141 KB | 81 KB (57%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-JSL8JE8FRZ&cx=c>m=4e64h1 | 151 KB | 72 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-48M2ES9DC2&cx=c>m=4e64h1 | 176 KB | 72 KB (41%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-SJ5FRP7YTL&cx=c>m=4e64h1 | 173 KB | 68 KB (39%) | ✓ | 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 InventoryAction152 resources · 11.3 MB · 4.1 MB savings availableFIX
~4.1 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 152 resources | 11.3 MiB | ||||||
CImage OptimizationAction48 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
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 Loading9 fonts (976 KB)PASS
Web fonts
9
976 KB total
Render-blocking
0
of 9
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
- 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 ~418 KB and ~836 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
AHTTP Cachingmax-age=300 (5 minutes)PASS
max-age=300
| Directive | Value | Meaning |
|---|---|---|
| max-age | 300 | Cache for 5 minutes |
Network Waterfall152 requests over 6224msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
us-south.watson-orchestrate.cloud.ibm.com us-south.watson-orchestrate.cloud.ibm.com | Other | 1287ms | 453 KB | 44% | NZ$19/mo | Costly |
Unattributable Unattributable | Other | 995ms | 0 KB | — | NZ$15/mo | Costly |
www.auckland.ac.nz www.auckland.ac.nz | Other | 770ms | 23 KB | — | NZ$11/mo | Costly |
assets.adobedtm.com assets.adobedtm.com | Other | 679ms | 76 KB | 38% | NZ$10/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 604ms | 192 KB | 28% | NZ$9/mo | Costly |
uoa-assistant.auckland.ac.nz uoa-assistant.auckland.ac.nz | Other | 538ms | 2206 KB | 61% | NZ$8/mo | Costly |
us-south.watson-orchestrate.cloud.ibm.com us-south.watson-orchestrate.cloud.ibm.com | Other | 441ms | 1116 KB | 73% | NZ$7/mo | Costly |
analytics.tiktok.com analytics.tiktok.com | Other | 434ms | 122 KB | 54% | NZ$6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 305ms | 173 KB | 39% | NZ$5/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 255ms | 176 KB | 41% | NZ$4/mo | Costly |
www.auckland.ac.nz www.auckland.ac.nz | Other | 207ms | 66 KB | 74% | NZ$3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 203ms | 143 KB | 44% | NZ$3/mo | Costly |
us-south.watson-orchestrate.cloud.ibm.com us-south.watson-orchestrate.cloud.ibm.com | Other | 202ms | 547 KB | 94% | NZ$3/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 186ms | 129 KB | 50% | NZ$3/mo | Optional |
us-south.watson-orchestrate.cloud.ibm.com us-south.watson-orchestrate.cloud.ibm.com | Other | 178ms | 471 KB | 94% | NZ$3/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 177ms | 151 KB | 48% | NZ$3/mo | Optional |
sc-static.net sc-static.net | Other | 177ms | 25 KB | — | NZ$3/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 167ms | 97 KB | 35% | NZ$2/mo | Optional |
us-south.watson-orchestrate.cloud.ibm.com us-south.watson-orchestrate.cloud.ibm.com | Other | 150ms | 201 KB | — | NZ$2/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 146ms | 47 KB | — | NZ$2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 82ms | 129 KB | 48% | NZ$1/mo | Optional |
siteintercept.qualtrics.com siteintercept.qualtrics.com | Other | 72ms | 36 KB | 71% | NZ$1/mo | Optional |
us-south.watson-orchestrate.cloud.ibm.com us-south.watson-orchestrate.cloud.ibm.com | Other | 70ms | 39 KB | 56% | NZ$1/mo | Optional |
LinkedIn Insight snap.licdn.com | Advertising | 60ms | 19 KB | — | NZ$1/mo | Optional |
uoa-assistant.auckland.ac.nz uoa-assistant.auckland.ac.nz | Other | 55ms | 15 KB | — | NZ$1/mo | Optional |
us-south.watson-orchestrate.cloud.ibm.com us-south.watson-orchestrate.cloud.ibm.com | Other | 55ms | 156 KB | 61% | NZ$1/mo | Optional |
analytics.tiktok.com analytics.tiktok.com | Other | 53ms | 40 KB | — | NZ$1/mo | Optional |
These scripts may cost more than they're worth
- us-south.watson-orchestrate.cloud.ibm.com adds 1287ms and costs ~NZ$19/month
- Unattributable adds 995ms and costs ~NZ$15/month
- www.auckland.ac.nz adds 770ms and costs ~NZ$11/month
- assets.adobedtm.com adds 679ms and costs ~NZ$10/month
- Google Tag Manager adds 604ms and costs ~NZ$9/month
- uoa-assistant.auckland.ac.nz adds 538ms and costs ~NZ$8/month
- us-south.watson-orchestrate.cloud.ibm.com adds 441ms and costs ~NZ$7/month
- analytics.tiktok.com adds 434ms and costs ~NZ$6/month
- Google Tag Manager adds 305ms and costs ~NZ$5/month
- Google Tag Manager adds 255ms and costs ~NZ$4/month
- www.auckland.ac.nz adds 207ms and costs ~NZ$3/month
- Google Tag Manager adds 203ms and costs ~NZ$3/month
- us-south.watson-orchestrate.cloud.ibm.com adds 202ms and costs ~NZ$3/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
us-south.watson-orchestrate.cloud.ibm.com takes 1287ms 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 995ms 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.auckland.ac.nz takes 770ms 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 679ms 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 604ms 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
uoa-assistant.auckland.ac.nz takes 538ms 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
61% of uoa-assistant.auckland.ac.nz'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
us-south.watson-orchestrate.cloud.ibm.com takes 441ms 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
73% of us-south.watson-orchestrate.cloud.ibm.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
analytics.tiktok.com takes 434ms 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 analytics.tiktok.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 305ms 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 255ms 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.auckland.ac.nz takes 207ms 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
74% of www.auckland.ac.nz'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 203ms 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
us-south.watson-orchestrate.cloud.ibm.com takes 202ms 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
94% of us-south.watson-orchestrate.cloud.ibm.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
94% of us-south.watson-orchestrate.cloud.ibm.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
71% of siteintercept.qualtrics.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
56% of us-south.watson-orchestrate.cloud.ibm.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
61% of us-south.watson-orchestrate.cloud.ibm.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