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
38 images, 0 KB saveable
REVIEW
38 images, 0 KB saveable
Warning::
!
https://media.wired.com/photos/69e6b3bd8d2fd342f27... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69de96afb083bab80be... 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::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e6d358d29b04dda3e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e21ced5bbca1ee221... 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/69d5747914cc7e3430d... 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/69dd05f668f51d0b7f4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e66df4d29b04dda3e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e6dccf9c8b9ae166e... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e667f1c6b38abb04c... 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/69e6d5973e9c0983de8... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e0e57f3af2e04b54b... 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/6451677ceb3f06fa814... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e668fcab15b90f6c6... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69dd573d3001957d4f6... 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/59cacaede7a72536045... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e1650c3768d90cb0b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69cffdb3640c23d3efe... 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/63517ff717fba1b3a9d... 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/69d99028b8bdc021bda... 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.
Warning::
!
https://media.wired.com/photos/69e00f87b4a75597c04... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/69e012ba1dd3a88684d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media.wired.com/photos/654271e660c83bd9a94... 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/69e64d98627d0e0d48a... 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/69e295a92e2d64bf927... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
38images21.2 MB
0oversized-0 KB
7legacy format
36missing 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
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
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 time27 ms
Start553 ms
RiskFOUT — text flashes from fallback to web font
Apercu-Bold-Pro.woff2woff2swap
Size46 KB
Load time47 ms
Start553 ms
RiskFOUT — text flashes from fallback to web font
WiredMono-Regular.woff2woff2swap
Size19 KB
Load time68 ms
Start553 ms
RiskFOUT — text flashes from fallback to web font
Apercu-Regular-Pro.woff2woff2swap
Size47 KB
Load time52 ms
Start554 ms
RiskFOUT — text flashes from fallback to web font
WiredMono-Bold.woff2woff2swap
Size19 KB
Load time58 ms
Start554 ms
RiskFOUT — text flashes from fallback to web font
Apercu-BoldItalic.woff2woff2swap
Size25 KB
Load time71 ms
Start554 ms
RiskFOUT — text flashes from fallback to web font
ProximaNova-Regular.woff2woff2swap
Size21 KB
Load time71 ms
Start554 ms
RiskFOUT — text flashes from fallback to web font
ProximaNova-RegularItal...woff2swap
Size21 KB
Load time71 ms
Start556 ms
RiskFOUT — text flashes from fallback to web font
WiredDisplay-BoldConden...woff2swap
Size25 KB
Load time67 ms
Start562 ms
RiskFOUT — text flashes from fallback to web font
WiredDisplay-BoldConden...woff2swap
Size27 KB
Load time67 ms
Start565 ms
RiskFOUT — text flashes from fallback to web font
BreveText-BookItalic.woff2woff2swap
Size31 KB
Load time44 ms
Start594 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
147 requests over 3186ms
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-party10242ms · 2322KB · £152/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.wired.com
www.wired.com
Other
1984ms
297 KB
49%
£29/mo
Costly
www.wired.com
www.wired.com
Other
1701ms
168 KB
—
£25/mo
Costly
www.wired.com
www.wired.com
Other
1559ms
32 KB
—
£23/mo
Costly
Unattributable
Unattributable
Other
1431ms
0 KB
—
£21/mo
Costly
privacy.condenastdigital.com
privacy.condenastdigital.com
Other
690ms
199 KB
—
£10/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
574ms
204 KB
35%
£8/mo
Costly
www.wired.com
www.wired.com
Other
487ms
64 KB
—
£7/mo
Costly
www.wired.com
www.wired.com
Other
351ms
481 KB
50%
£5/mo
Costly
www.wired.com
www.wired.com
Other
270ms
0 KB
—
£4/mo
Costly
www.wired.com
www.wired.com
Other
211ms
16 KB
—
£3/mo
Costly
www.wired.com
www.wired.com
Other
208ms
305 KB
48%
£3/mo
Costly
cdn.gladly.com
cdn.gladly.com
Other
188ms
44 KB
56%
£3/mo
Optional
globalservices.conde.digital
globalservices.conde.digital
Other
164ms
26 KB
—
£2/mo
Optional
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
162ms
188 KB
77%
£2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
132ms
120 KB
51%
£2/mo
Optional
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
71ms
34 KB
—
£1/mo
Optional
www.wired.com
www.wired.com
Other
59ms
145 KB
75%
£1/mo
Optional
www.wired.com
Other
Costly
Execution1984ms
Transfer297 KB
Unused49%
Monthly Cost£29/mo
www.wired.com
Other
Costly
Execution1701ms
Transfer168 KB
Monthly Cost£25/mo
www.wired.com
Other
Costly
Execution1559ms
Transfer32 KB
Monthly Cost£23/mo
Unattributable
Other
Costly
Execution1431ms
Transfer0 KB
Monthly Cost£21/mo
privacy.condenastdigital.com
Other
Costly
Execution690ms
Transfer199 KB
Monthly Cost£10/mo
Google Tag Manager
Tag Manager
Costly
Execution574ms
Transfer204 KB
Unused35%
Monthly Cost£8/mo
www.wired.com
Other
Costly
Execution487ms
Transfer64 KB
Monthly Cost£7/mo
www.wired.com
Other
Costly
Execution351ms
Transfer481 KB
Unused50%
Monthly Cost£5/mo
www.wired.com
Other
Costly
Execution270ms
Transfer0 KB
Monthly Cost£4/mo
www.wired.com
Other
Costly
Execution211ms
Transfer16 KB
Monthly Cost£3/mo
www.wired.com
Other
Costly
Execution208ms
Transfer305 KB
Unused48%
Monthly Cost£3/mo
cdn.gladly.com
Other
Optional
Execution188ms
Transfer44 KB
Unused56%
Monthly Cost£3/mo
globalservices.conde.digital
Other
Optional
Execution164ms
Transfer26 KB
Monthly Cost£2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution162ms
Transfer188 KB
Unused77%
Monthly Cost£2/mo
Google Tag Manager
Tag Manager
Optional
Execution132ms
Transfer120 KB
Unused51%
Monthly Cost£2/mo
securepubads.g.doubleclick.net
Other
Optional
Execution71ms
Transfer34 KB
Monthly Cost£1/mo
www.wired.com
Other
Optional
Execution59ms
Transfer145 KB
Unused75%
Monthly Cost£1/mo
These scripts may cost more than they're worth
www.wired.com adds 1984ms and costs ~£29/month
www.wired.com adds 1701ms and costs ~£25/month
www.wired.com adds 1559ms and costs ~£23/month
Unattributable adds 1431ms and costs ~£21/month
privacy.condenastdigital.com adds 690ms and costs ~£10/month
Google Tag Manager adds 574ms and costs ~£8/month
www.wired.com adds 487ms and costs ~£7/month
www.wired.com adds 351ms and costs ~£5/month
www.wired.com adds 270ms and costs ~£4/month
www.wired.com adds 211ms and costs ~£3/month
www.wired.com adds 208ms 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
www.wired.com takes 1984ms 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 1701ms 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 1559ms 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 1431ms 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 690ms 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 574ms 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 487ms 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 351ms 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 270ms 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 211ms 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 208ms 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 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.
Source: web.dev
75% 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.