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
34 images, 0 KB saveable
REVIEW
34 images, 0 KB saveable
Warning::
!
https://media.wired.com/photos/69df1b43d64f8f9661d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69d6f6552ce2d8ce963... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69d56806948761f395b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69d585fca17189a9bfd... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69deb8f5fa20dbfacc2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69cd244228d35b2c1df... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/6451677ceb3f06fa814... 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://media.wired.com/photos/69d681be0aa0c0c6d4d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69d5729e948761f395b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/696bb6f2b0c775c788d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/6942c596ccb20d7f662... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69dd3923d295d33b0cb... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/685f10e6472f227b69c... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/59cacaede7a72536045... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69c342b9ea56e672b4e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69cec0fd316700facf3... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69c138458ee963c6c9d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/63517ff717fba1b3a9d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/686729e7c3e228b3598... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69d5747914cc7e3430d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/6995f4e36d0b5a054ae... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/5c1c75ed59e96b0db45... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/68a91d240ff15a77d5c... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69c5c6fcd03999521bd... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/6984c757373aa7c9b06... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69dea084bbe4a9ff56b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69dfb6527e53dbff73e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/62cc3e03e0140c38a4e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69decbf74d898774bc7... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69dec7e359777aa7419... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.wired.com/verso/static/wired-us/assets... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
34images6.7 MB
0oversized-0 KB
5legacy format
32missing 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
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
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
11 fonts (313 KB)
PASS
11 fonts (313 KB)
Info::
i
11 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
11
313 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
BreveText-Book.woff2woff2swap
Size31 KB
Load time61 ms
Start592 ms
RiskFOUT — text flashes from fallback to web font
Apercu-Bold-Pro.woff2woff2swap
Size46 KB
Load time79 ms
Start592 ms
RiskFOUT — text flashes from fallback to web font
WiredMono-Regular.woff2woff2swap
Size19 KB
Load time79 ms
Start593 ms
RiskFOUT — text flashes from fallback to web font
Apercu-Regular-Pro.woff2woff2swap
Size47 KB
Load time80 ms
Start593 ms
RiskFOUT — text flashes from fallback to web font
WiredMono-Bold.woff2woff2swap
Size19 KB
Load time81 ms
Start593 ms
RiskFOUT — text flashes from fallback to web font
Apercu-BoldItalic.woff2woff2swap
Size25 KB
Load time97 ms
Start593 ms
RiskFOUT — text flashes from fallback to web font
ProximaNova-Regular.woff2woff2swap
Size21 KB
Load time94 ms
Start598 ms
RiskFOUT — text flashes from fallback to web font
ProximaNova-RegularItal...woff2swap
Size21 KB
Load time95 ms
Start598 ms
RiskFOUT — text flashes from fallback to web font
WiredDisplay-BoldConden...woff2swap
Size25 KB
Load time97 ms
Start602 ms
RiskFOUT — text flashes from fallback to web font
WiredDisplay-BoldConden...woff2swap
Size27 KB
Load time80 ms
Start616 ms
RiskFOUT — text flashes from fallback to web font
BreveText-BookItalic.woff2woff2swap
Size31 KB
Load time80 ms
Start620 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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
✓
Page uses 3 resource hint(s)
Current Resource Hints
preconnect
2
preload
1
dns-prefetch—
prefetch—
3 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
139 requests over 6072ms
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-party9807ms · 2221KB · $169/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.wired.com
www.wired.com
Other
2291ms
330 KB
49%
$40/mo
Costly
www.wired.com
www.wired.com
Other
1568ms
172 KB
—
$27/mo
Costly
www.wired.com
www.wired.com
Other
1415ms
32 KB
—
$24/mo
Costly
Unattributable
Unattributable
Other
951ms
0 KB
—
$16/mo
Costly
www.wired.com
www.wired.com
Other
857ms
67 KB
—
$15/mo
Costly
privacy.condenastdigital.com
privacy.condenastdigital.com
Other
617ms
198 KB
—
$11/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
369ms
204 KB
35%
$6/mo
Costly
www.wired.com
www.wired.com
Other
352ms
481 KB
50%
$6/mo
Costly
www.wired.com
www.wired.com
Other
254ms
0 KB
—
$4/mo
Costly
www.wired.com
www.wired.com
Other
175ms
8 KB
—
$3/mo
Optional
cdn.gladly.com
cdn.gladly.com
Other
172ms
43 KB
55%
$3/mo
Optional
www.wired.com
www.wired.com
Other
166ms
304 KB
47%
$3/mo
Optional
globalservices.conde.digital
globalservices.conde.digital
Other
158ms
26 KB
—
$3/mo
Optional
www.wired.com
www.wired.com
Other
139ms
15 KB
—
$2/mo
Optional
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
134ms
186 KB
77%
$2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
127ms
120 KB
51%
$2/mo
Optional
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
62ms
34 KB
—
$1/mo
Optional
www.wired.com
Other
Costly
Execution2291ms
Transfer330 KB
Unused49%
Monthly Cost$40/mo
www.wired.com
Other
Costly
Execution1568ms
Transfer172 KB
Monthly Cost$27/mo
www.wired.com
Other
Costly
Execution1415ms
Transfer32 KB
Monthly Cost$24/mo
Unattributable
Other
Costly
Execution951ms
Transfer0 KB
Monthly Cost$16/mo
www.wired.com
Other
Costly
Execution857ms
Transfer67 KB
Monthly Cost$15/mo
privacy.condenastdigital.com
Other
Costly
Execution617ms
Transfer198 KB
Monthly Cost$11/mo
Google Tag Manager
Tag Manager
Costly
Execution369ms
Transfer204 KB
Unused35%
Monthly Cost$6/mo
www.wired.com
Other
Costly
Execution352ms
Transfer481 KB
Unused50%
Monthly Cost$6/mo
www.wired.com
Other
Costly
Execution254ms
Transfer0 KB
Monthly Cost$4/mo
www.wired.com
Other
Optional
Execution175ms
Transfer8 KB
Monthly Cost$3/mo
cdn.gladly.com
Other
Optional
Execution172ms
Transfer43 KB
Unused55%
Monthly Cost$3/mo
www.wired.com
Other
Optional
Execution166ms
Transfer304 KB
Unused47%
Monthly Cost$3/mo
globalservices.conde.digital
Other
Optional
Execution158ms
Transfer26 KB
Monthly Cost$3/mo
www.wired.com
Other
Optional
Execution139ms
Transfer15 KB
Monthly Cost$2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution134ms
Transfer186 KB
Unused77%
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Optional
Execution127ms
Transfer120 KB
Unused51%
Monthly Cost$2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution62ms
Transfer34 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.wired.com adds 2291ms and costs ~$40/month
www.wired.com adds 1568ms and costs ~$27/month
www.wired.com adds 1415ms and costs ~$24/month
Unattributable adds 951ms and costs ~$16/month
www.wired.com adds 857ms and costs ~$15/month
privacy.condenastdigital.com adds 617ms and costs ~$11/month
Google Tag Manager adds 369ms and costs ~$6/month
www.wired.com adds 352ms and costs ~$6/month
www.wired.com adds 254ms 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
www.wired.com takes 2291ms 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.wired.com takes 1568ms 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.wired.com takes 1415ms 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 951ms 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.wired.com takes 857ms 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
privacy.condenastdigital.com takes 617ms 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 369ms 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.wired.com takes 352ms 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
50% of www.wired.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
www.wired.com takes 254ms 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
55% of cdn.gladly.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
77% of securepubads.g.doubleclick.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
51% 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.