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.
B
Image Optimization
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Warning::
!
https://www.unicamp.br/wp-content/themes/bx-unicam... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
27images2.0 MB
0oversized-0 KB
23legacy format
1missing 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
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 (224 KB)
PASS
4 fonts (224 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
224 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
JTUSjIg1_i6t8kCHKm459Wl...woff2swap
Size35 KB
Load time31 ms
Start1.7 s
RiskFOUT — text flashes from fallback to web font
font-woff;charset=utf-8...woffswap
Size2 KB
Load time110 ms
Start1.7 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
fa-solid-900.woff2woff2swap
Size153 KB
Load time22 ms
Start2.4 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
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time21 ms
Start3.1 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 ~77 KB and ~154 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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
✓
Page uses 4 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch
4
prefetch—
4 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
95 requests over 4242ms
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-party8534ms · 517KB · R$25/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.gstatic.com
www.gstatic.com
Other
2188ms
0 KB
43%
R$6/mo
Costly
jsDelivr
cdn.jsdelivr.net
CDN
1912ms
42 KB
58%
R$6/mo
Costly
www.unicamp.br
www.unicamp.br
Other
1600ms
37 KB
—
R$5/mo
Costly
Unattributable
Unattributable
Other
942ms
0 KB
—
R$3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
507ms
157 KB
41%
R$2/mo
Costly
www.unicamp.br
www.unicamp.br
Other
498ms
22 KB
—
R$1/mo
Costly
cse.google.com
cse.google.com
Other
248ms
4 KB
—
R$1/mo
Costly
cse.google.com
cse.google.com
Other
176ms
44 KB
73%
R$1/mo
Optional
www.google.com
www.google.com
Other
98ms
99 KB
48%
R$0/mo
Optional
www.unicamp.br
www.unicamp.br
Other
94ms
30 KB
—
R$0/mo
Optional
www.unicamp.br
www.unicamp.br
Other
81ms
5 KB
—
R$0/mo
Optional
www.unicamp.br
www.unicamp.br
Other
75ms
6 KB
—
R$0/mo
Optional
ep2.adtrafficquality.google
ep2.adtrafficquality.google
Other
64ms
8 KB
—
R$0/mo
Optional
www.unicamp.br
www.unicamp.br
Other
50ms
64 KB
—
R$0/mo
Optional
www.gstatic.com
Other
Costly
Execution2188ms
Transfer0 KB
Unused43%
Monthly CostR$6/mo
jsDelivr
CDN
Costly
Execution1912ms
Transfer42 KB
Unused58%
Monthly CostR$6/mo
www.unicamp.br
Other
Costly
Execution1600ms
Transfer37 KB
Monthly CostR$5/mo
Unattributable
Other
Costly
Execution942ms
Transfer0 KB
Monthly CostR$3/mo
Google Tag Manager
Tag Manager
Costly
Execution507ms
Transfer157 KB
Unused41%
Monthly CostR$2/mo
www.unicamp.br
Other
Costly
Execution498ms
Transfer22 KB
Monthly CostR$1/mo
cse.google.com
Other
Costly
Execution248ms
Transfer4 KB
Monthly CostR$1/mo
cse.google.com
Other
Optional
Execution176ms
Transfer44 KB
Unused73%
Monthly CostR$1/mo
www.google.com
Other
Optional
Execution98ms
Transfer99 KB
Unused48%
Monthly CostR$0/mo
www.unicamp.br
Other
Optional
Execution94ms
Transfer30 KB
Monthly CostR$0/mo
www.unicamp.br
Other
Optional
Execution81ms
Transfer5 KB
Monthly CostR$0/mo
www.unicamp.br
Other
Optional
Execution75ms
Transfer6 KB
Monthly CostR$0/mo
ep2.adtrafficquality.google
Other
Optional
Execution64ms
Transfer8 KB
Monthly CostR$0/mo
www.unicamp.br
Other
Optional
Execution50ms
Transfer64 KB
Monthly CostR$0/mo
These scripts may cost more than they're worth
www.gstatic.com adds 2188ms and costs ~R$6/month
jsDelivr adds 1912ms and costs ~R$6/month
www.unicamp.br adds 1600ms and costs ~R$5/month
Unattributable adds 942ms and costs ~R$3/month
Google Tag Manager adds 507ms and costs ~R$2/month
www.unicamp.br adds 498ms and costs ~R$1/month
cse.google.com adds 248ms and costs ~R$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
www.gstatic.com takes 2188ms 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 1912ms 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
58% 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
www.unicamp.br takes 1600ms 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 942ms 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 507ms 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.unicamp.br takes 498ms 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
cse.google.com takes 248ms 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
73% of cse.google.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.