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
19 images, 0 KB saveable
REVIEW
19 images, 0 KB saveable
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wisconsin.gov/_catalogs/masterpage/WIG... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
19images1.5 MB
0oversized-0 KB
17legacy format
9missing 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
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
4 fonts (256 KB)
PASS
4 fonts (256 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
256 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time7 ms
Start830 ms
RiskFOUT — text flashes from fallback to web font
1Ptug8zYS_SKggPNyC0IT4t...woff2swap
Size42 KB
Load time12 ms
Start892 ms
RiskFOUT — text flashes from fallback to web font
bootstrap-icons.woff2woff2swap
Size128 KB
Load time17 ms
Start892 ms
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
memtYaGs126MiZpBA-UFUIc...woff2swap
Size44 KB
Load time13 ms
Start894 ms
RiskFOUT — 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)
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
81 requests over 2648ms
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-party4080ms · 2554KB · $54/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.wisconsin.gov
www.wisconsin.gov
Other
937ms
99 KB
—
$12/mo
Costly
Unattributable
Unattributable
Other
773ms
0 KB
—
$10/mo
Costly
www.wisconsin.gov
www.wisconsin.gov
Other
481ms
66 KB
—
$6/mo
Costly
Zendesk Widget
static.zdassets.com
Customer Support
439ms
218 KB
49%
$6/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
293ms
151 KB
42%
$4/mo
Costly
www.wisconsin.gov
www.wisconsin.gov
Other
211ms
298 KB
65%
$3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
209ms
125 KB
51%
$3/mo
Costly
www.wisconsin.gov
www.wisconsin.gov
Other
182ms
1020 KB
75%
$2/mo
Optional
www.wisconsin.gov
www.wisconsin.gov
Other
174ms
495 KB
91%
$2/mo
Optional
Zendesk Widget
static.zdassets.com
Customer Support
135ms
5 KB
—
$2/mo
Optional
Google Analytics
www.google-analytics.com
Analytics
71ms
21 KB
—
$1/mo
Optional
Zendesk Widget
static.zdassets.com
Customer Support
65ms
22 KB
—
$1/mo
Optional
code.jquery.com
code.jquery.com
Other
61ms
30 KB
—
$1/mo
Optional
Zendesk Widget
static.zdassets.com
Customer Support
51ms
5 KB
—
$1/mo
Optional
www.wisconsin.gov
Other
Costly
Execution937ms
Transfer99 KB
Monthly Cost$12/mo
Unattributable
Other
Costly
Execution773ms
Transfer0 KB
Monthly Cost$10/mo
www.wisconsin.gov
Other
Costly
Execution481ms
Transfer66 KB
Monthly Cost$6/mo
Zendesk Widget
Customer Support
Costly
Execution439ms
Transfer218 KB
Unused49%
Monthly Cost$6/mo
Google Tag Manager
Tag Manager
Costly
Execution293ms
Transfer151 KB
Unused42%
Monthly Cost$4/mo
www.wisconsin.gov
Other
Costly
Execution211ms
Transfer298 KB
Unused65%
Monthly Cost$3/mo
Google Tag Manager
Tag Manager
Costly
Execution209ms
Transfer125 KB
Unused51%
Monthly Cost$3/mo
www.wisconsin.gov
Other
Optional
Execution182ms
Transfer1020 KB
Unused75%
Monthly Cost$2/mo
www.wisconsin.gov
Other
Optional
Execution174ms
Transfer495 KB
Unused91%
Monthly Cost$2/mo
Zendesk Widget
Customer Support
Optional
Execution135ms
Transfer5 KB
Monthly Cost$2/mo
Google Analytics
Analytics
Optional
Execution71ms
Transfer21 KB
Monthly Cost$1/mo
Zendesk Widget
Customer Support
Optional
Execution65ms
Transfer22 KB
Monthly Cost$1/mo
code.jquery.com
Other
Optional
Execution61ms
Transfer30 KB
Monthly Cost$1/mo
Zendesk Widget
Customer Support
Optional
Execution51ms
Transfer5 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.wisconsin.gov adds 937ms and costs ~$12/month
Unattributable adds 773ms and costs ~$10/month
www.wisconsin.gov adds 481ms and costs ~$6/month
Zendesk Widget adds 439ms and costs ~$6/month
Google Tag Manager adds 293ms and costs ~$4/month
www.wisconsin.gov adds 211ms and costs ~$3/month
Google Tag Manager adds 209ms and costs ~$3/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.wisconsin.gov takes 937ms 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
Unattributable takes 773ms 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.wisconsin.gov takes 481ms 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
Zendesk Widget takes 439ms 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 293ms 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.wisconsin.gov 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
65% of www.wisconsin.gov'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 209ms 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
51% 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
75% of www.wisconsin.gov'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
91% of www.wisconsin.gov'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.