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
70 images, 0 KB saveable
REVIEW
70 images, 0 KB saveable
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/logo-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/tvBra... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://ebc.com.br/banners/view/++widget++form.wid... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/ebc-l... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/logo-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://ebc.com.br/banners/view/++widget++form.wid... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/baixe... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/app_s... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/googl... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/tvbra... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/aoviv... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/canal... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/logo-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/playe... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ebc.com.br/++plone++ebc.inst2024/banne... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
70images10.2 MB
0oversized-0 KB
65legacy format
15missing 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
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
6 fonts (184 KB)
PASS
6 fonts (184 KB)
Info::
i
6 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
6
184 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
TipoBrasilRounded-400Re...otfswap
Size39 KB
Load time83 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
TipoBrasilRounded-700Se...otfswap
Size42 KB
Load time75 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
TipoBrasilRounded-850Bo...otfswap
Size43 KB
Load time78 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
TipoBrasilRounded-600Me...otfswap
Size41 KB
Load time80 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
38861cba61c66739c1452c3...ttfswap
Size19 KB
Load time7 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
38861cba61c66739c1452c3...ttfswap
Size0 KB
Load time2 ms
Start2.1 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 ~55 KB and ~110 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+
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
145 requests over 5518ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
91%of JavaScript execution is third-party
First-party Third-party3793ms · 452KB · R$47/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.ebc.com.br
www.ebc.com.br
Other
1324ms
55 KB
—
R$16/mo
Costly
Unattributable
Unattributable
Other
898ms
0 KB
—
R$11/mo
Costly
jsDelivr
cdn.jsdelivr.net
CDN
476ms
0 KB
59%
R$6/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
341ms
155 KB
41%
R$4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
301ms
156 KB
42%
R$4/mo
Costly
Microsoft Clarity
scripts.clarity.ms
Session Replay
285ms
25 KB
—
R$4/mo
Costly
s.go-mpulse.net
s.go-mpulse.net
Other
84ms
58 KB
66%
R$1/mo
Optional
aovivo.ebc.com.br
aovivo.ebc.com.br
Other
84ms
2 KB
—
R$1/mo
Optional
www.ebc.com.br
Other
Costly
Execution1324ms
Transfer55 KB
Monthly CostR$16/mo
Unattributable
Other
Costly
Execution898ms
Transfer0 KB
Monthly CostR$11/mo
jsDelivr
CDN
Costly
Execution476ms
Transfer0 KB
Unused59%
Monthly CostR$6/mo
Google Tag Manager
Tag Manager
Costly
Execution341ms
Transfer155 KB
Unused41%
Monthly CostR$4/mo
Google Tag Manager
Tag Manager
Costly
Execution301ms
Transfer156 KB
Unused42%
Monthly CostR$4/mo
Microsoft Clarity
Session Replay
Costly
Execution285ms
Transfer25 KB
Monthly CostR$4/mo
s.go-mpulse.net
Other
Optional
Execution84ms
Transfer58 KB
Unused66%
Monthly CostR$1/mo
aovivo.ebc.com.br
Other
Optional
Execution84ms
Transfer2 KB
Monthly CostR$1/mo
These scripts may cost more than they're worth
www.ebc.com.br adds 1324ms and costs ~R$16/month
Unattributable adds 898ms and costs ~R$11/month
jsDelivr adds 476ms and costs ~R$6/month
Google Tag Manager adds 341ms and costs ~R$4/month
Google Tag Manager adds 301ms and costs ~R$4/month
Microsoft Clarity adds 285ms and costs ~R$4/month
91% 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.ebc.com.br takes 1324ms 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 898ms 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
jsDelivr takes 476ms 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
59% 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.
Source: web.dev
Google Tag Manager takes 341ms 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 301ms 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
Microsoft Clarity takes 285ms 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
66% of s.go-mpulse.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.