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
32 images, 0 KB saveable
REVIEW
32 images, 0 KB saveable
Warning::
!
https://i.abcnewsfe.com/a/8304d486-fb9d-4fbc-8f18-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://s.abcnews.com/assets/dtci/images/android-2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/86e3f38c-b4ea-46e4-a800-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/f1cf0e3a-1572-49f1-8881-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/7cd9d308-1a03-419e-8b17-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/19f061b5-4b67-4703-b450-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets-cdn.abcotvs.net/static/images/Disne... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://s.abcnews.com/assets/dtci/images/ios-2022.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/25f8b423-b06f-4eed-9d45-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://s.abcnews.com/assets/dtci/icomoon/svg/logo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/e5d59935-196e-4e8e-b73c-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/6af97dae-27bc-460a-bce6-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/dbc5cb53-f706-453d-bea4-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/df7fcfda-3be8-476b-858a-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/930c7016-a31e-4889-925a-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/477bf637-fed8-45d1-bd55-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/61866137-59b9-4f99-87a0-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/6a8b7bf1-c0c9-4384-9fbd-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/a714641c-499e-4117-98fd-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i.abcnewsfe.com/a/5342d729-1eb1-42fc-a00d-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets-cdn.abcotvs.net/static/images/devic... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://assets-cdn.abcotvs.net/static/images/devic... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
32images6.5 MB
0oversized-0 KB
13legacy 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
7 fonts (307 KB)
PASS
7 fonts (307 KB)
Info::
i
7 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
7
307 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
PostGrotesk-Book.woff2woff2swap
Size52 KB
Load time186 ms
Start603 ms
RiskFOUT — text flashes from fallback to web font
PostGrotesk-Bold.woff2woff2swap
Size53 KB
Load time171 ms
Start603 ms
RiskFOUT — text flashes from fallback to web font
PostGrotesk-Medium.woff2woff2swap
Size54 KB
Load time196 ms
Start604 ms
RiskFOUT — text flashes from fallback to web font
PostGrotesk-Light.woff2woff2swap
Size50 KB
Load time162 ms
Start604 ms
RiskFOUT — text flashes from fallback to web font
TiemposHeadline-Regular...woff2swap
Size33 KB
Load time178 ms
Start604 ms
RiskFOUT — text flashes from fallback to web font
TiemposHeadline-Regular...woff2swap
Size34 KB
Load time191 ms
Start604 ms
RiskFOUT — text flashes from fallback to web font
TiemposHeadline-Medium....woff2swap
Size32 KB
Load time188 ms
Start604 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)
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
13 hints, 0 missing preconnects
PASS
13 hints, 0 missing preconnects
Info::
✓
Page uses 13 resource hint(s)
Current Resource Hints
preconnect
2
preload
8
dns-prefetch—
prefetch
3
13 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
134 requests over 5340ms
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-party5926ms · 2503KB · $79/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
abcnews.com
abcnews.com
Other
1242ms
296 KB
—
$16/mo
Costly
Unattributable
Unattributable
Other
834ms
0 KB
—
$11/mo
Costly
hiveplayer-static.bamgrid.com
hiveplayer-static.bamgrid.com
Other
746ms
109 KB
84%
$10/mo
Costly
assets-cdn.abcnews.com
assets-cdn.abcnews.com
Other
688ms
0 KB
—
$9/mo
Costly
assets-cdn.abcnews.com
assets-cdn.abcnews.com
Other
497ms
0 KB
—
$7/mo
Costly
assets-cdn.abcnews.com
assets-cdn.abcnews.com
Other
346ms
757 KB
42%
$5/mo
Costly
dcf.espn.com
dcf.espn.com
Other
288ms
112 KB
69%
$4/mo
Costly
dcf.espn.com
dcf.espn.com
Other
202ms
115 KB
48%
$3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
200ms
137 KB
45%
$3/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
167ms
130 KB
46%
$2/mo
Optional
js.appboycdn.com
js.appboycdn.com
Other
127ms
63 KB
69%
$2/mo
Optional
assets-cdn.abcnews.com
assets-cdn.abcnews.com
Other
116ms
382 KB
57%
$2/mo
Optional
static.chartbeat.com
static.chartbeat.com
Other
104ms
25 KB
—
$1/mo
Optional
scripts.webcontentassessor.com
scripts.webcontentassessor.com
Other
100ms
139 KB
—
$1/mo
Optional
cdn-gl.imrworldwide.com
cdn-gl.imrworldwide.com
Other
98ms
73 KB
54%
$1/mo
Optional
assets-cdn.abcnews.com
assets-cdn.abcnews.com
Other
87ms
106 KB
—
$1/mo
Optional
dcf.espn.com
dcf.espn.com
Other
84ms
59 KB
53%
$1/mo
Optional
abcnews.com
Other
Costly
Execution1242ms
Transfer296 KB
Monthly Cost$16/mo
Unattributable
Other
Costly
Execution834ms
Transfer0 KB
Monthly Cost$11/mo
hiveplayer-static.bamgrid.com
Other
Costly
Execution746ms
Transfer109 KB
Unused84%
Monthly Cost$10/mo
assets-cdn.abcnews.com
Other
Costly
Execution688ms
Transfer0 KB
Monthly Cost$9/mo
assets-cdn.abcnews.com
Other
Costly
Execution497ms
Transfer0 KB
Monthly Cost$7/mo
assets-cdn.abcnews.com
Other
Costly
Execution346ms
Transfer757 KB
Unused42%
Monthly Cost$5/mo
dcf.espn.com
Other
Costly
Execution288ms
Transfer112 KB
Unused69%
Monthly Cost$4/mo
dcf.espn.com
Other
Costly
Execution202ms
Transfer115 KB
Unused48%
Monthly Cost$3/mo
Google Tag Manager
Tag Manager
Optional
Execution200ms
Transfer137 KB
Unused45%
Monthly Cost$3/mo
Google Tag Manager
Tag Manager
Optional
Execution167ms
Transfer130 KB
Unused46%
Monthly Cost$2/mo
js.appboycdn.com
Other
Optional
Execution127ms
Transfer63 KB
Unused69%
Monthly Cost$2/mo
assets-cdn.abcnews.com
Other
Optional
Execution116ms
Transfer382 KB
Unused57%
Monthly Cost$2/mo
static.chartbeat.com
Other
Optional
Execution104ms
Transfer25 KB
Monthly Cost$1/mo
scripts.webcontentassessor.com
Other
Optional
Execution100ms
Transfer139 KB
Monthly Cost$1/mo
cdn-gl.imrworldwide.com
Other
Optional
Execution98ms
Transfer73 KB
Unused54%
Monthly Cost$1/mo
assets-cdn.abcnews.com
Other
Optional
Execution87ms
Transfer106 KB
Monthly Cost$1/mo
dcf.espn.com
Other
Optional
Execution84ms
Transfer59 KB
Unused53%
Monthly Cost$1/mo
These scripts may cost more than they're worth
abcnews.com adds 1242ms and costs ~$16/month
Unattributable adds 834ms and costs ~$11/month
hiveplayer-static.bamgrid.com adds 746ms and costs ~$10/month
assets-cdn.abcnews.com adds 688ms and costs ~$9/month
assets-cdn.abcnews.com adds 497ms and costs ~$7/month
assets-cdn.abcnews.com adds 346ms and costs ~$5/month
dcf.espn.com adds 288ms and costs ~$4/month
dcf.espn.com adds 202ms 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
abcnews.com takes 1242ms 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 834ms 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
hiveplayer-static.bamgrid.com takes 746ms 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
84% of hiveplayer-static.bamgrid.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.
Source: web.dev
assets-cdn.abcnews.com takes 688ms 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
assets-cdn.abcnews.com takes 497ms 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
assets-cdn.abcnews.com takes 346ms 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
dcf.espn.com takes 288ms 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
69% of dcf.espn.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.
Source: web.dev
dcf.espn.com takes 202ms 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
69% of js.appboycdn.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.
Source: web.dev
57% of assets-cdn.abcnews.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.
Source: web.dev
54% of cdn-gl.imrworldwide.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.
Source: web.dev
53% of dcf.espn.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.