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
25 images, 0 KB saveable
REVIEW
25 images, 0 KB saveable
Warning::
!
https://www.uark.edu/_resources/images/10296_MPSW_... 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://includes.uark.edu/assets/ua-logo-horz.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.uark.edu/_resources/images/RS31868_104... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.uark.edu/_resources/images/danterrion-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.uark.edu/my-path-senior-walk/10671_MPS... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://includes.uark.edu/assets/tower-grey.webp is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.uark.edu/_resources/images/dedicated-b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
25images1.6 MB
0oversized-0 KB
22legacy format
8missing 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
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
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
9 fonts (400 KB)
PASS
9 fonts (400 KB)
Info::
i
9 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
9
400 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
S6uyw4BMUTPHjx4wXiWtFCc...woff2swap
Size14 KB
Load time10 ms
Start840 ms
RiskFOUT — text flashes from fallback to web font
S6u9w4BMUTPHh7USSwiPGQ3...woff2swap
Size14 KB
Load time25 ms
Start843 ms
RiskFOUT — text flashes from fallback to web font
R707jywflP6FLr3gZx7K8Uy...woff2swap
Size144 KB
Load time47 ms
Start844 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
S6u8w4BMUTPHjxsAXC-qNiX...woff2swap
Size15 KB
Load time39 ms
Start844 ms
RiskFOUT — text flashes from fallback to web font
R705jywflP6FLr3gZx7K8Uy...woff2swap
Size166 KB
Load time49 ms
Start844 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
S6u9w4BMUTPHh6UVSwiPGQ3...woff2swap
Size14 KB
Load time34 ms
Start844 ms
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time18 ms
Start1.0 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size0 KB
Load time1 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size0 KB
Load time0 ms
Start1.1 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 ~155 KB and ~310 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
170 requests over 6227ms
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-party13444ms · 983KB · $232/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
jsDelivr
cdn.jsdelivr.net
CDN
5273ms
29 KB
—
$91/mo
Costly
www.uark.edu
www.uark.edu
Other
2218ms
91 KB
—
$38/mo
Costly
Unattributable
Unattributable
Other
1364ms
0 KB
—
$24/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
917ms
145 KB
52%
$16/mo
Costly
Microsoft Clarity
scripts.clarity.ms
Session Replay
486ms
26 KB
—
$8/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
442ms
143 KB
39%
$8/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
406ms
152 KB
43%
$7/mo
Costly
kit.fontawesome.com
kit.fontawesome.com
Other
368ms
6 KB
—
$6/mo
Costly
prod.ally.ac
prod.ally.ac
Other
325ms
120 KB
65%
$6/mo
Costly
Facebook Pixel
connect.facebook.net
Advertising
320ms
45 KB
—
$6/mo
Costly
sc-static.net
sc-static.net
Other
222ms
25 KB
—
$4/mo
Costly
Facebook Pixel
connect.facebook.net
Advertising
216ms
97 KB
35%
$4/mo
Costly
www.uark.edu
www.uark.edu
Other
185ms
11 KB
—
$3/mo
Optional
jsDelivr
cdn.jsdelivr.net
CDN
181ms
4 KB
—
$3/mo
Optional
code.jquery.com
code.jquery.com
Other
146ms
30 KB
—
$3/mo
Optional
jsDelivr
cdn.jsdelivr.net
CDN
129ms
18 KB
—
$2/mo
Optional
jsDelivr
cdn.jsdelivr.net
CDN
111ms
24 KB
—
$2/mo
Optional
cdn01.basis.net
cdn01.basis.net
Other
75ms
3 KB
—
$1/mo
Optional
Bing UET
bat.bing.com
Advertising
59ms
15 KB
—
$1/mo
Optional
jsDelivr
CDN
Costly
Execution5273ms
Transfer29 KB
Monthly Cost$91/mo
www.uark.edu
Other
Costly
Execution2218ms
Transfer91 KB
Monthly Cost$38/mo
Unattributable
Other
Costly
Execution1364ms
Transfer0 KB
Monthly Cost$24/mo
Google Tag Manager
Tag Manager
Costly
Execution917ms
Transfer145 KB
Unused52%
Monthly Cost$16/mo
Microsoft Clarity
Session Replay
Costly
Execution486ms
Transfer26 KB
Monthly Cost$8/mo
Google Tag Manager
Tag Manager
Costly
Execution442ms
Transfer143 KB
Unused39%
Monthly Cost$8/mo
Google Tag Manager
Tag Manager
Costly
Execution406ms
Transfer152 KB
Unused43%
Monthly Cost$7/mo
kit.fontawesome.com
Other
Costly
Execution368ms
Transfer6 KB
Monthly Cost$6/mo
prod.ally.ac
Other
Costly
Execution325ms
Transfer120 KB
Unused65%
Monthly Cost$6/mo
Facebook Pixel
Advertising
Costly
Execution320ms
Transfer45 KB
Monthly Cost$6/mo
sc-static.net
Other
Costly
Execution222ms
Transfer25 KB
Monthly Cost$4/mo
Facebook Pixel
Advertising
Costly
Execution216ms
Transfer97 KB
Unused35%
Monthly Cost$4/mo
www.uark.edu
Other
Optional
Execution185ms
Transfer11 KB
Monthly Cost$3/mo
jsDelivr
CDN
Optional
Execution181ms
Transfer4 KB
Monthly Cost$3/mo
code.jquery.com
Other
Optional
Execution146ms
Transfer30 KB
Monthly Cost$3/mo
jsDelivr
CDN
Optional
Execution129ms
Transfer18 KB
Monthly Cost$2/mo
jsDelivr
CDN
Optional
Execution111ms
Transfer24 KB
Monthly Cost$2/mo
cdn01.basis.net
Other
Optional
Execution75ms
Transfer3 KB
Monthly Cost$1/mo
Bing UET
Advertising
Optional
Execution59ms
Transfer15 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
jsDelivr adds 5273ms and costs ~$91/month
www.uark.edu adds 2218ms and costs ~$38/month
Unattributable adds 1364ms and costs ~$24/month
Google Tag Manager adds 917ms and costs ~$16/month
Microsoft Clarity adds 486ms and costs ~$8/month
Google Tag Manager adds 442ms and costs ~$8/month
Google Tag Manager adds 406ms and costs ~$7/month
kit.fontawesome.com adds 368ms and costs ~$6/month
prod.ally.ac adds 325ms and costs ~$6/month
Facebook Pixel adds 320ms and costs ~$6/month
sc-static.net adds 222ms and costs ~$4/month
Facebook Pixel adds 216ms and costs ~$4/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
jsDelivr takes 5273ms 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.uark.edu takes 2218ms 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 1364ms 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 917ms 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 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.
Source: web.dev
Microsoft Clarity 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
Google Tag Manager takes 442ms 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 406ms 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
kit.fontawesome.com takes 368ms 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
prod.ally.ac takes 325ms 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
65% of prod.ally.ac'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
Facebook Pixel takes 320ms 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
sc-static.net 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
Facebook Pixel takes 216ms 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.