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
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
!
data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.ucf.edu/wp-content/blogs.dir/16/files/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24images550 KB
0oversized-0 KB
5legacy format
2missing 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
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 (2234 KB)
PASS
11 fonts (2234 KB)
Info::
i
11 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
11
2234 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
fa-brands-400.woff2woff2swap
Size117 KB
Load time116 ms
Start103 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-thin-100.woff2woff2swap
Size491 KB
Load time186 ms
Start104 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-light-300.woff2woff2swap
Size453 KB
Load time216 ms
Start105 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-regular-400.woff2woff2swap
Size415 KB
Load time188 ms
Start105 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-solid-900.woff2woff2swap
Size345 KB
Load time181 ms
Start106 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-v4compatibility.woff2woff2swap
Size5 KB
Load time129 ms
Start106 ms
RiskFOUT — text flashes from fallback to web font
ucfsansserifalt-medium-...woff2swap
Size18 KB
Load time36 ms
Start466 ms
RiskFOUT — text flashes from fallback to web font
ucfsansserifalt-bold-we...woff2swap
Size18 KB
Load time30 ms
Start466 ms
RiskFOUT — text flashes from fallback to web font
fa-solid-900.woff2woff2swap
Size345 KB
Load time36 ms
Start466 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
ucfsansserifalt-light-w...woff2swap
Size18 KB
Load time33 ms
Start467 ms
RiskFOUT — text flashes from fallback to web font
ucfcondensedalt-regular...woff2swap
Size9 KB
Load time26 ms
Start468 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 ~1083 KB and ~2166 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
12 hints, 0 missing preconnects
PASS
12 hints, 0 missing preconnects
Info::
✓
Page uses 12 resource hint(s)
Current Resource Hints
preconnect—
preload
6
dns-prefetch
6
prefetch—
12 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
86 requests over 2609ms
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-party3987ms · 911KB · $53/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
Google Tag Manager
www.googletagmanager.com
Tag Manager
579ms
165 KB
40%
$8/mo
Costly
Unattributable
Unattributable
Other
553ms
0 KB
—
$7/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
516ms
171 KB
40%
$7/mo
Costly
www.ucf.edu
www.ucf.edu
Other
426ms
17 KB
—
$6/mo
Costly
www.ucf.edu
www.ucf.edu
Other
403ms
41 KB
—
$5/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
370ms
152 KB
42%
$5/mo
Costly
ajax.googleapis.com
ajax.googleapis.com
Other
264ms
31 KB
—
$4/mo
Costly
www.ucf.edu
www.ucf.edu
Other
242ms
4 KB
—
$3/mo
Costly
js-agent.newrelic.com
js-agent.newrelic.com
Other
176ms
19 KB
—
$2/mo
Optional
www.ucf.edu
www.ucf.edu
Other
146ms
126 KB
—
$2/mo
Optional
static.chartbeat.com
static.chartbeat.com
Other
136ms
16 KB
—
$2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
115ms
152 KB
71%
$2/mo
Optional
siteimproveanalytics.com
siteimproveanalytics.com
Other
62ms
18 KB
—
$1/mo
Optional
Google Tag Manager
Tag Manager
Costly
Execution579ms
Transfer165 KB
Unused40%
Monthly Cost$8/mo
Unattributable
Other
Costly
Execution553ms
Transfer0 KB
Monthly Cost$7/mo
Google Tag Manager
Tag Manager
Costly
Execution516ms
Transfer171 KB
Unused40%
Monthly Cost$7/mo
www.ucf.edu
Other
Costly
Execution426ms
Transfer17 KB
Monthly Cost$6/mo
www.ucf.edu
Other
Costly
Execution403ms
Transfer41 KB
Monthly Cost$5/mo
Google Tag Manager
Tag Manager
Costly
Execution370ms
Transfer152 KB
Unused42%
Monthly Cost$5/mo
ajax.googleapis.com
Other
Costly
Execution264ms
Transfer31 KB
Monthly Cost$4/mo
www.ucf.edu
Other
Costly
Execution242ms
Transfer4 KB
Monthly Cost$3/mo
js-agent.newrelic.com
Other
Optional
Execution176ms
Transfer19 KB
Monthly Cost$2/mo
www.ucf.edu
Other
Optional
Execution146ms
Transfer126 KB
Monthly Cost$2/mo
static.chartbeat.com
Other
Optional
Execution136ms
Transfer16 KB
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Optional
Execution115ms
Transfer152 KB
Unused71%
Monthly Cost$2/mo
siteimproveanalytics.com
Other
Optional
Execution62ms
Transfer18 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
Google Tag Manager adds 579ms and costs ~$8/month
Unattributable adds 553ms and costs ~$7/month
Google Tag Manager adds 516ms and costs ~$7/month
www.ucf.edu adds 426ms and costs ~$6/month
www.ucf.edu adds 403ms and costs ~$5/month
Google Tag Manager adds 370ms and costs ~$5/month
ajax.googleapis.com adds 264ms and costs ~$4/month
www.ucf.edu adds 242ms 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
Google Tag Manager takes 579ms 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 553ms 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 516ms 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.ucf.edu takes 426ms 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.ucf.edu takes 403ms 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 370ms 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
ajax.googleapis.com takes 264ms 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.ucf.edu takes 242ms 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
71% 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.