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
22 images, 0 KB saveable
REVIEW
22 images, 0 KB saveable
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/GBa5fWrR... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/4stFQiwM... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/Ghp4Fqn4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/1SuLkwj8... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/7Dk3tIPL... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/CLeItCuQ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/6Pmk2Xm1... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/5uIpx9YH... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/2nXLjh2F... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images.ctfassets.net/5qimfmsew7zl/UhmxPpzI... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
22images1.4 MB
0oversized-0 KB
5legacy format
11missing 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
Performance issues directly impact user engagement and conversion rates.
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 (668 KB)
PASS
4 fonts (668 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
668 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
OpenSans-VariableFont_w...woff2swap
Size274 KB
Load time54 ms
Start626 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
OpenSans-Italic-Variabl...woff2swap
Size308 KB
Load time54 ms
Start626 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
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time54 ms
Start1.5 s
RiskFOUT — text flashes from fallback to web font
memtYaGs126MiZpBA-UFUIc...woff2swap
Size44 KB
Load time59 ms
Start1.5 s
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 ~291 KB and ~582 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
111 requests over 4735ms
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-party6789ms · 4708KB · $22/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
sketchup.trimble.com
sketchup.trimble.com
Other
1991ms
43 KB
—
$6/mo
Costly
sketchup.trimble.com
sketchup.trimble.com
Other
1006ms
929 KB
64%
$3/mo
Costly
Unattributable
Unattributable
Other
628ms
0 KB
—
$2/mo
Costly
sketchup.trimble.com
sketchup.trimble.com
Other
478ms
142 KB
68%
$2/mo
Costly
sketchup.trimble.com
sketchup.trimble.com
Other
394ms
243 KB
70%
$1/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
347ms
185 KB
37%
$1/mo
Costly
sketchup.trimble.com
sketchup.trimble.com
Other
344ms
240 KB
—
$1/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
258ms
147 KB
48%
$1/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
229ms
173 KB
46%
$1/mo
Costly
sketchup.trimble.com
sketchup.trimble.com
Other
222ms
345 KB
27%
$1/mo
Costly
web-sdk.aptrinsic.com
web-sdk.aptrinsic.com
Other
217ms
230 KB
72%
$1/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
204ms
177 KB
48%
$1/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
143ms
145 KB
46%
$0/mo
Optional
sketchup.trimble.com
sketchup.trimble.com
Other
123ms
1395 KB
—
$0/mo
Optional
www.googleoptimize.com
www.googleoptimize.com
Other
87ms
109 KB
62%
$0/mo
Optional
sketchup.trimble.com
sketchup.trimble.com
Other
63ms
153 KB
68%
$0/mo
Optional
sketchup.trimble.com
sketchup.trimble.com
Other
52ms
51 KB
67%
$0/mo
Optional
sketchup.trimble.com
Other
Costly
Execution1991ms
Transfer43 KB
Monthly Cost$6/mo
sketchup.trimble.com
Other
Costly
Execution1006ms
Transfer929 KB
Unused64%
Monthly Cost$3/mo
Unattributable
Other
Costly
Execution628ms
Transfer0 KB
Monthly Cost$2/mo
sketchup.trimble.com
Other
Costly
Execution478ms
Transfer142 KB
Unused68%
Monthly Cost$2/mo
sketchup.trimble.com
Other
Costly
Execution394ms
Transfer243 KB
Unused70%
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Costly
Execution347ms
Transfer185 KB
Unused37%
Monthly Cost$1/mo
sketchup.trimble.com
Other
Costly
Execution344ms
Transfer240 KB
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Costly
Execution258ms
Transfer147 KB
Unused48%
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Costly
Execution229ms
Transfer173 KB
Unused46%
Monthly Cost$1/mo
sketchup.trimble.com
Other
Costly
Execution222ms
Transfer345 KB
Unused27%
Monthly Cost$1/mo
web-sdk.aptrinsic.com
Other
Costly
Execution217ms
Transfer230 KB
Unused72%
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Costly
Execution204ms
Transfer177 KB
Unused48%
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Optional
Execution143ms
Transfer145 KB
Unused46%
Monthly Cost$0/mo
sketchup.trimble.com
Other
Optional
Execution123ms
Transfer1395 KB
Monthly Cost$0/mo
www.googleoptimize.com
Other
Optional
Execution87ms
Transfer109 KB
Unused62%
Monthly Cost$0/mo
sketchup.trimble.com
Other
Optional
Execution63ms
Transfer153 KB
Unused68%
Monthly Cost$0/mo
sketchup.trimble.com
Other
Optional
Execution52ms
Transfer51 KB
Unused67%
Monthly Cost$0/mo
These scripts may cost more than they're worth
sketchup.trimble.com adds 1991ms and costs ~$6/month
sketchup.trimble.com adds 1006ms and costs ~$3/month
Unattributable adds 628ms and costs ~$2/month
sketchup.trimble.com adds 478ms and costs ~$2/month
sketchup.trimble.com adds 394ms and costs ~$1/month
Google Tag Manager adds 347ms and costs ~$1/month
sketchup.trimble.com adds 344ms and costs ~$1/month
Google Tag Manager adds 258ms and costs ~$1/month
Google Tag Manager adds 229ms and costs ~$1/month
sketchup.trimble.com adds 222ms and costs ~$1/month
web-sdk.aptrinsic.com adds 217ms and costs ~$1/month
Google Tag Manager adds 204ms and costs ~$1/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
sketchup.trimble.com takes 1991ms 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
sketchup.trimble.com takes 1006ms 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
64% of sketchup.trimble.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
Unattributable takes 628ms 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
sketchup.trimble.com takes 478ms 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
68% of sketchup.trimble.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
sketchup.trimble.com takes 394ms 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
70% of sketchup.trimble.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
Google Tag Manager takes 347ms 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
sketchup.trimble.com takes 344ms 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 258ms 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 229ms 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
sketchup.trimble.com takes 222ms 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
web-sdk.aptrinsic.com takes 217ms 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
72% of web-sdk.aptrinsic.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
Google Tag Manager takes 204ms 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 www.googleoptimize.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
68% of sketchup.trimble.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
67% of sketchup.trimble.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.