https://www.oaic.gov.au/__data/assets/file/0020/12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0026/12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0023/91... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0023/13... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0021/12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0027/26... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/git_bridge/0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0020/12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/image/0026/9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0020/13... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0025/12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0019/12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/git_bridge/0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.oaic.gov.au/__data/assets/file/0018/12... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
48images7.2 MB
0oversized-0 KB
47legacy format
14missing dimensionsCLS 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
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
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
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
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
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
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
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW
Green Hosting
No green hosting detected
B
HTTP Caching
private, max-age=0
REVIEW
private, max-age=0
Info::
✓
Cache-Control header is set
Got: private, max-age=0
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
private, max-age=0
Directive
Value
Meaning
private
—
Only browser cache, not CDN/proxy
max-age
0
Cache for 0 seconds
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 (186 KB)
PASS
5 fonts (186 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
186 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
6xK3dSBYKcSV-LCoeQqfX1R...woff2swap
Size15 KB
Load time43 ms
Start1.9 s
RiskFOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R...woff2swap
Size15 KB
Load time54 ms
Start1.9 s
RiskFOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R...woff2swap
Size14 KB
Load time44 ms
Start1.9 s
RiskFOUT — text flashes from fallback to web font
6xKydSBYKcSV-LCoeQqfX1R...woff2swap
Size14 KB
Load time49 ms
Start1.9 s
RiskFOUT — text flashes from fallback to web font
bootstrap-icons.woff2woff2swap
Size128 KB
Load time65 ms
Start1.9 s
RiskFOUT — text flashes from fallback to web font
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 ~64 KB and ~128 ms
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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
✓
Page uses 2 resource hint(s)
Current Resource Hints
preconnect
2
preload—
dns-prefetch—
prefetch—
2 resource hints configured
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
82 requests over 3556ms
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-party4741ms · 461KB · A$82/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
Unattributable
Unattributable
Other
1734ms
0 KB
—
A$30/mo
Costly
www.gstatic.com
www.gstatic.com
Other
1121ms
0 KB
49%
A$19/mo
Costly
www.oaic.gov.au
www.oaic.gov.au
Other
967ms
14 KB
—
A$17/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
402ms
160 KB
41%
A$7/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
251ms
120 KB
53%
A$4/mo
Costly
www.oaic.gov.au
www.oaic.gov.au
Other
143ms
69 KB
44%
A$2/mo
Optional
cdn-oc.readspeaker.com
cdn-oc.readspeaker.com
Other
71ms
28 KB
—
A$1/mo
Optional
jsDelivr
cdn.jsdelivr.net
CDN
52ms
71 KB
89%
A$1/mo
Optional
Unattributable
Other
Costly
Execution1734ms
Transfer0 KB
Monthly CostA$30/mo
www.gstatic.com
Other
Costly
Execution1121ms
Transfer0 KB
Unused49%
Monthly CostA$19/mo
www.oaic.gov.au
Other
Costly
Execution967ms
Transfer14 KB
Monthly CostA$17/mo
Google Tag Manager
Tag Manager
Costly
Execution402ms
Transfer160 KB
Unused41%
Monthly CostA$7/mo
Google Tag Manager
Tag Manager
Costly
Execution251ms
Transfer120 KB
Unused53%
Monthly CostA$4/mo
www.oaic.gov.au
Other
Optional
Execution143ms
Transfer69 KB
Unused44%
Monthly CostA$2/mo
cdn-oc.readspeaker.com
Other
Optional
Execution71ms
Transfer28 KB
Monthly CostA$1/mo
jsDelivr
CDN
Optional
Execution52ms
Transfer71 KB
Unused89%
Monthly CostA$1/mo
These scripts may cost more than they're worth
Unattributable adds 1734ms and costs ~A$30/month
www.gstatic.com adds 1121ms and costs ~A$19/month
www.oaic.gov.au adds 967ms and costs ~A$17/month
Google Tag Manager adds 402ms and costs ~A$7/month
Google Tag Manager adds 251ms 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 1734ms 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.gstatic.com takes 1121ms 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.oaic.gov.au takes 967ms 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 402ms 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 251ms 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
53% of Google Tag Manager'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
89% of jsDelivr'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.