https://tree-nation.com/images/tracking/label-co2-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2024/05/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2024/01/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2026/02/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/09/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/themes/criteo201... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/04/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.criteo.com/wp-content/uploads/2025/03/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
66images2.1 MB
0oversized-0 KB
55legacy format
22missing 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
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
11 fonts (788 KB)
PASS
11 fonts (788 KB)
Info::
i
11 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
11
788 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
Mona-Sans-RegularWide.woffwoffswap
Size22 KB
Load time40 ms
Start26 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Graphik-Regular-Cy-Web....woff2swap
Size43 KB
Load time40 ms
Start26 ms
RiskFOUT — text flashes from fallback to web font
Graphik-Medium-Cy-Web.w...woff2swap
Size47 KB
Load time38 ms
Start26 ms
RiskFOUT — text flashes from fallback to web font
Graphik-Semibold-Cy-Web...woff2swap
Size47 KB
Load time24 ms
Start26 ms
RiskFOUT — text flashes from fallback to web font
fa-solid-900.woff2woff2swap
Size139 KB
Load time46 ms
Start27 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
fa-brands-400.woff2woff2swap
Size137 KB
Load time42 ms
Start27 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
fa-brands-400.woffwoffswap
Size159 KB
Load time8 ms
Start507 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
fa-brands-400.ttfttfswap
Size90 KB
Load time7 ms
Start531 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
fa-brands-400.woff2woff2swap
Size76 KB
Load time74 ms
Start553 ms
RiskFOUT — text flashes from fallback to web font
x-font-woff;charset=utf...woffswap
Size8 KB
Load time54 ms
Start2.7 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Inter-Extended.woffwoffswap
Size21 KB
Load time2 ms
Start2.7 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
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 ~308 KB and ~616 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
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
A
HTTP Caching
max-age=86400 (1 day)
PASS
max-age=86400 (1 day)
Info::
✓
Cache-Control header is set
Got: public, max-age=86400
Info::
✓
Effective TTL: 1 day (max-age=86400)
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
public, max-age=86400
Directive
Value
Meaning
public
—
Any cache may store this response
max-age
86400
Cache for 1 day
Effective TTL: 86400 seconds
Network Waterfall
182 requests over 4240ms
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-party4960ms · 1239KB · $66/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.criteo.com
www.criteo.com
Other
1776ms
19 KB
—
$24/mo
Costly
www.criteo.com
www.criteo.com
Other
1024ms
31 KB
—
$14/mo
Costly
Unattributable
Unattributable
Other
486ms
0 KB
—
$6/mo
Costly
www.criteo.com
www.criteo.com
Other
407ms
85 KB
—
$5/mo
Costly
fast.wistia.com
fast.wistia.com
Other
309ms
147 KB
46%
$4/mo
Costly
fast.wistia.net
fast.wistia.net
Other
250ms
159 KB
52%
$3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
119ms
194 KB
38%
$2/mo
Optional
fast.wistia.com
fast.wistia.com
Other
109ms
55 KB
—
$1/mo
Optional
www.criteo.com
www.criteo.com
Other
100ms
6 KB
—
$1/mo
Optional
www.criteo.com
www.criteo.com
Other
95ms
35 KB
—
$1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
88ms
176 KB
37%
$1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
84ms
146 KB
45%
$1/mo
Optional
web.cmp.usercentrics.eu
web.cmp.usercentrics.eu
Other
58ms
56 KB
64%
$1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
56ms
129 KB
48%
$1/mo
Optional
www.criteo.com
Other
Costly
Execution1776ms
Transfer19 KB
Monthly Cost$24/mo
www.criteo.com
Other
Costly
Execution1024ms
Transfer31 KB
Monthly Cost$14/mo
Unattributable
Other
Costly
Execution486ms
Transfer0 KB
Monthly Cost$6/mo
www.criteo.com
Other
Costly
Execution407ms
Transfer85 KB
Monthly Cost$5/mo
fast.wistia.com
Other
Costly
Execution309ms
Transfer147 KB
Unused46%
Monthly Cost$4/mo
fast.wistia.net
Other
Costly
Execution250ms
Transfer159 KB
Unused52%
Monthly Cost$3/mo
Google Tag Manager
Tag Manager
Optional
Execution119ms
Transfer194 KB
Unused38%
Monthly Cost$2/mo
fast.wistia.com
Other
Optional
Execution109ms
Transfer55 KB
Monthly Cost$1/mo
www.criteo.com
Other
Optional
Execution100ms
Transfer6 KB
Monthly Cost$1/mo
www.criteo.com
Other
Optional
Execution95ms
Transfer35 KB
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Optional
Execution88ms
Transfer176 KB
Unused37%
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Optional
Execution84ms
Transfer146 KB
Unused45%
Monthly Cost$1/mo
web.cmp.usercentrics.eu
Other
Optional
Execution58ms
Transfer56 KB
Unused64%
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Optional
Execution56ms
Transfer129 KB
Unused48%
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.criteo.com adds 1776ms and costs ~$24/month
www.criteo.com adds 1024ms and costs ~$14/month
Unattributable adds 486ms and costs ~$6/month
www.criteo.com adds 407ms and costs ~$5/month
fast.wistia.com adds 309ms and costs ~$4/month
fast.wistia.net adds 250ms 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.criteo.com takes 1776ms 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.criteo.com takes 1024ms 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 486ms 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.criteo.com takes 407ms 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
fast.wistia.com takes 309ms 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
fast.wistia.net takes 250ms 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
52% of fast.wistia.net'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
64% of web.cmp.usercentrics.eu'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.