https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... 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://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.westerndigital.com/content/dam/store/e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
37images187 KB
0oversized-0 KB
16legacy format
13missing 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
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
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
5 fonts (84 KB)
PASS
5 fonts (84 KB)
Info::
i
5 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
5
84 KB total
Render-blocking
0
of 5
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
roboto-v18-latin-regula...woff2swap
Size17 KB
Load time8 ms
Start345 ms
RiskFOUT — text flashes from fallback to web font
roboto-v18-latin-700.woff2woff2swap
Size17 KB
Load time11 ms
Start346 ms
RiskFOUT — text flashes from fallback to web font
roboto-v18-latin-500.woff2woff2swap
Size17 KB
Load time13 ms
Start347 ms
RiskFOUT — text flashes from fallback to web font
roboto-v18-latin-300.woff2woff2swap
Size17 KB
Load time28 ms
Start832 ms
RiskFOUT — text flashes from fallback to web font
roboto-v18-latin-regula...woff2swap
Size17 KB
Load time21 ms
Start3.3 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)
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
8 hints, 0 missing preconnects
PASS
8 hints, 0 missing preconnects
Info::
✓
Page uses 8 resource hint(s)
Current Resource Hints
preconnect
4
preload
1
dns-prefetch
3
prefetch—
8 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
A
HTTP Caching
max-age=7200 (2 hours)
PASS
max-age=7200 (2 hours)
Info::
✓
Cache-Control header is set
Got: max-age=7200
Info::
✓
Effective TTL: 2 hours (max-age=7200)
Info::
i
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control
max-age=7200
Directive
Value
Meaning
max-age
7200
Cache for 2 hours
Effective TTL: 7200 seconds
Network Waterfall
145 requests over 4786ms
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-party11379ms · 1764KB · $65/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
static.westerndigital.com
static.westerndigital.com
Other
2457ms
52 KB
—
$14/mo
Costly
www.westerndigital.com
www.westerndigital.com
Other
1968ms
154 KB
—
$11/mo
Costly
www.westerndigital.com
www.westerndigital.com
Other
1829ms
175 KB
82%
$10/mo
Costly
Unattributable
Unattributable
Other
1794ms
0 KB
—
$10/mo
Costly
apps.usw2.pure.cloud
apps.usw2.pure.cloud
Other
864ms
167 KB
51%
$5/mo
Costly
www.westerndigital.com
www.westerndigital.com
Other
797ms
649 KB
57%
$5/mo
Costly
assets.adobedtm.com
assets.adobedtm.com
Other
474ms
146 KB
27%
$3/mo
Costly
s.go-mpulse.net
s.go-mpulse.net
Other
236ms
0 KB
56%
$1/mo
Costly
Facebook Pixel
connect.facebook.net
Advertising
203ms
97 KB
44%
$1/mo
Costly
consent.app.relyance.ai
consent.app.relyance.ai
Other
173ms
72 KB
39%
$1/mo
Optional
apps.bazaarvoice.com
apps.bazaarvoice.com
Other
140ms
27 KB
—
$1/mo
Optional
apps.usw2.pure.cloud
apps.usw2.pure.cloud
Other
108ms
106 KB
60%
$1/mo
Optional
Twitter/X Pixel
static.ads-twitter.com
Advertising
99ms
13 KB
—
$1/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
93ms
45 KB
46%
$1/mo
Optional
apps.bazaarvoice.com
apps.bazaarvoice.com
Other
76ms
46 KB
—
$0/mo
Optional
apps.bazaarvoice.com
apps.bazaarvoice.com
Other
68ms
14 KB
—
$0/mo
Optional
static.westerndigital.com
Other
Costly
Execution2457ms
Transfer52 KB
Monthly Cost$14/mo
www.westerndigital.com
Other
Costly
Execution1968ms
Transfer154 KB
Monthly Cost$11/mo
www.westerndigital.com
Other
Costly
Execution1829ms
Transfer175 KB
Unused82%
Monthly Cost$10/mo
Unattributable
Other
Costly
Execution1794ms
Transfer0 KB
Monthly Cost$10/mo
apps.usw2.pure.cloud
Other
Costly
Execution864ms
Transfer167 KB
Unused51%
Monthly Cost$5/mo
www.westerndigital.com
Other
Costly
Execution797ms
Transfer649 KB
Unused57%
Monthly Cost$5/mo
assets.adobedtm.com
Other
Costly
Execution474ms
Transfer146 KB
Unused27%
Monthly Cost$3/mo
s.go-mpulse.net
Other
Costly
Execution236ms
Transfer0 KB
Unused56%
Monthly Cost$1/mo
Facebook Pixel
Advertising
Costly
Execution203ms
Transfer97 KB
Unused44%
Monthly Cost$1/mo
consent.app.relyance.ai
Other
Optional
Execution173ms
Transfer72 KB
Unused39%
Monthly Cost$1/mo
apps.bazaarvoice.com
Other
Optional
Execution140ms
Transfer27 KB
Monthly Cost$1/mo
apps.usw2.pure.cloud
Other
Optional
Execution108ms
Transfer106 KB
Unused60%
Monthly Cost$1/mo
Twitter/X Pixel
Advertising
Optional
Execution99ms
Transfer13 KB
Monthly Cost$1/mo
Facebook Pixel
Advertising
Optional
Execution93ms
Transfer45 KB
Unused46%
Monthly Cost$1/mo
apps.bazaarvoice.com
Other
Optional
Execution76ms
Transfer46 KB
Monthly Cost$0/mo
apps.bazaarvoice.com
Other
Optional
Execution68ms
Transfer14 KB
Monthly Cost$0/mo
These scripts may cost more than they're worth
static.westerndigital.com adds 2457ms and costs ~$14/month
www.westerndigital.com adds 1968ms and costs ~$11/month
www.westerndigital.com adds 1829ms and costs ~$10/month
Unattributable adds 1794ms and costs ~$10/month
apps.usw2.pure.cloud adds 864ms and costs ~$5/month
www.westerndigital.com adds 797ms and costs ~$5/month
assets.adobedtm.com adds 474ms and costs ~$3/month
s.go-mpulse.net adds 236ms and costs ~$1/month
Facebook Pixel adds 203ms and costs ~$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
static.westerndigital.com takes 2457ms 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.westerndigital.com takes 1968ms 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.westerndigital.com takes 1829ms 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
82% of www.westerndigital.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
Unattributable takes 1794ms 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
apps.usw2.pure.cloud takes 864ms 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
51% of apps.usw2.pure.cloud'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.westerndigital.com takes 797ms 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
57% of www.westerndigital.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.adobedtm.com takes 474ms 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
s.go-mpulse.net takes 236ms 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
56% 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.
Source: web.dev
Facebook Pixel takes 203ms 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
60% of apps.usw2.pure.cloud'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.