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.
B
Page Weight Budget
1.5 MB transferred, 54 requests
REVIEW
1.5 MB transferred, 54 requests
Info::
i
Page weighs 4.9 MB (1.5 MB transferred)
Warning::
!
JavaScript is 1003 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1003 KB
Info::
i
54 HTTP requests
Info::
i
Estimated 0.32 g CO2 per page load
1.5 MBtransferred
54 requests
0.32 g CO2 per page load
JavaScript1003.0 KiB64%
Images264.8 KiB17%
CSS101.8 KiB7%
HTML93.8 KiB6%
Fonts66.7 KiB4%
Other24.7 KiB2%
Other3.5 KiB0%
Other744 B0%
Other555 B0%
02.4 MB4.9 MB
Approaching limit
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Why this matters
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
C
Image Optimization
Action
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Warning::
!
https://www.nme.com/wp-content/uploads/2020/01/log... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.nme.com/wp-content/uploads/2019/11/log... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
7images265 KB
0oversized-0 KB
7legacy format
2missing 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
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
2 fonts (67 KB)
PASS
2 fonts (67 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
67 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
newspaper.woffwoffswap
Size25 KB
Load time7 ms
Start148 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time54 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 ~7 KB and ~14 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
14 hints, 0 missing preconnects
PASS
14 hints, 0 missing preconnects
Info::
✓
Page uses 14 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch
+4
14
prefetch—
14 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
54 requests over 1888ms
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-party3305ms · 960KB · £34/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.nme.com
www.nme.com
Other
816ms
94 KB
—
£8/mo
Costly
www.nme.com
www.nme.com
Other
343ms
35 KB
—
£4/mo
Costly
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
334ms
76 KB
—
£3/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
311ms
173 KB
37%
£3/mo
Costly
Unattributable
Unattributable
Other
285ms
0 KB
—
£3/mo
Costly
cdn.onthe.io
cdn.onthe.io
Other
260ms
31 KB
—
£3/mo
Costly
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
239ms
188 KB
72%
£2/mo
Costly
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
221ms
70 KB
53%
£2/mo
Costly
c.amazon-adsystem.com
c.amazon-adsystem.com
Other
138ms
91 KB
64%
£1/mo
Optional
www.nme.com
www.nme.com
Other
132ms
73 KB
77%
£1/mo
Optional
Facebook Pixel
connect.facebook.net
Advertising
131ms
97 KB
48%
£1/mo
Optional
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
95ms
34 KB
—
£1/mo
Optional
www.nme.com
Other
Costly
Execution816ms
Transfer94 KB
Monthly Cost£8/mo
www.nme.com
Other
Costly
Execution343ms
Transfer35 KB
Monthly Cost£4/mo
fundingchoicesmessages.google.com
Other
Costly
Execution334ms
Transfer76 KB
Monthly Cost£3/mo
Google Tag Manager
Tag Manager
Costly
Execution311ms
Transfer173 KB
Unused37%
Monthly Cost£3/mo
Unattributable
Other
Costly
Execution285ms
Transfer0 KB
Monthly Cost£3/mo
cdn.onthe.io
Other
Costly
Execution260ms
Transfer31 KB
Monthly Cost£3/mo
securepubads.g.doubleclick.net
Other
Costly
Execution239ms
Transfer188 KB
Unused72%
Monthly Cost£2/mo
fundingchoicesmessages.google.com
Other
Costly
Execution221ms
Transfer70 KB
Unused53%
Monthly Cost£2/mo
c.amazon-adsystem.com
Other
Optional
Execution138ms
Transfer91 KB
Unused64%
Monthly Cost£1/mo
www.nme.com
Other
Optional
Execution132ms
Transfer73 KB
Unused77%
Monthly Cost£1/mo
Facebook Pixel
Advertising
Optional
Execution131ms
Transfer97 KB
Unused48%
Monthly Cost£1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution95ms
Transfer34 KB
Monthly Cost£1/mo
These scripts may cost more than they're worth
www.nme.com adds 816ms and costs ~£8/month
www.nme.com adds 343ms and costs ~£4/month
fundingchoicesmessages.google.com adds 334ms and costs ~£3/month
Google Tag Manager adds 311ms and costs ~£3/month
Unattributable adds 285ms and costs ~£3/month
cdn.onthe.io adds 260ms and costs ~£3/month
securepubads.g.doubleclick.net adds 239ms and costs ~£2/month
fundingchoicesmessages.google.com adds 221ms and costs ~£2/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.nme.com takes 816ms 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.nme.com takes 343ms 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
fundingchoicesmessages.google.com takes 334ms 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 311ms 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 285ms 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
cdn.onthe.io takes 260ms 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
securepubads.g.doubleclick.net takes 239ms 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
72% 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
fundingchoicesmessages.google.com takes 221ms 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
53% of fundingchoicesmessages.google.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
64% of c.amazon-adsystem.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 www.nme.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.