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
Page Weight Budget
Action
1.7 MB transferred, 98 requests
REVIEW
1.7 MB transferred, 98 requests
Info::
i
Page weighs 10.0 MB (1.7 MB transferred)
Warning::
!
JavaScript is 1.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.0 MB
Info::
i
Fonts are 320 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 320 KB
Info::
i
98 HTTP requests
Info::
i
Estimated 0.35 g CO2 per page load
1.7 MBtransferred
98 requests
0.35 g CO2 per page load
JavaScript1.0 MiB61%
Fonts320.5 KiB19%
Images112.0 KiB7%
HTML89.4 KiB5%
Other86.9 KiB5%
CSS38.3 KiB2%
Other16.5 KiB1%
Other2.2 KiB0%
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
Subset fonts to include only used characters, or switch to system font stacks.
Why this matters
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
B
Image Optimization
8 images, 0 KB saveable
REVIEW
8 images, 0 KB saveable
Info::
✓
All images are well-optimized
8images112 KB
0oversized-0 KB
4legacy format
0missing dimensionsCLS risk
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 (320 KB)
PASS
11 fonts (320 KB)
Info::
i
11 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
11
320 KB total
Render-blocking
0
of 11
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
DomaineDisplayNarrow-Bo...otfswap
Size21 KB
Load time9 ms
Start680 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
SchnyderCondM-Demi.ttfttfswap
Size69 KB
Load time21 ms
Start680 ms
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Butler_Regular.woffwoffswap
Size0 KB
Load time188 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
lwoff2swap
Size16 KB
Load time31 ms
Start1.1 s
RiskFOUT — text flashes from fallback to web font
Butler_Regular.woffwoffswap
Size26 KB
Load time292 ms
Start1.2 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
SchnyderCondM-Demi.ttfttfswap
Size69 KB
Load time12 ms
Start1.8 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
DomaineDisplayNarrow-Bo...otfswap
Size21 KB
Load time9 ms
Start1.8 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
lwoff2swap
Size60 KB
Load time5 ms
Start1.8 s
RiskFOUT — text flashes from fallback to web font
lwoff2swap
Size0 KB
Load time11 ms
Start1.8 s
RiskFOUT — text flashes from fallback to web font
lwoff2swap
Size19 KB
Load time6 ms
Start1.8 s
RiskFOUT — text flashes from fallback to web font
lwoff2swap
Size20 KB
Load time3 ms
Start1.8 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 ~62 KB and ~124 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
20 hints, 0 missing preconnects
PASS
20 hints, 0 missing preconnects
Info::
✓
Page uses 20 resource hint(s)
Current Resource Hints
preconnect
1
preload
8
dns-prefetch
+1
11
prefetch—
20 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
98 requests over 1865ms
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-party4093ms · 900KB · $71/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.artnews.com
www.artnews.com
Other
1805ms
89 KB
—
$31/mo
Costly
Unattributable
Unattributable
Other
675ms
0 KB
—
$12/mo
Costly
cdn.tinypass.com
cdn.tinypass.com
Other
363ms
133 KB
63%
$6/mo
Costly
ads.blogherads.com
ads.blogherads.com
Other
301ms
132 KB
80%
$5/mo
Costly
www.artnews.com
www.artnews.com
Other
243ms
31 KB
66%
$4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
183ms
153 KB
43%
$3/mo
Optional
cds.connatix.com
cds.connatix.com
Other
123ms
139 KB
68%
$2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
106ms
127 KB
53%
$2/mo
Optional
html-load.com
html-load.com
Other
94ms
42 KB
—
$2/mo
Optional
www.artnews.com
www.artnews.com
Other
77ms
17 KB
—
$1/mo
Optional
pagead2.googlesyndication.com
pagead2.googlesyndication.com
Other
67ms
0 KB
64%
$1/mo
Optional
daybreaklights.com
daybreaklights.com
Other
56ms
36 KB
—
$1/mo
Optional
www.artnews.com
Other
Costly
Execution1805ms
Transfer89 KB
Monthly Cost$31/mo
Unattributable
Other
Costly
Execution675ms
Transfer0 KB
Monthly Cost$12/mo
cdn.tinypass.com
Other
Costly
Execution363ms
Transfer133 KB
Unused63%
Monthly Cost$6/mo
ads.blogherads.com
Other
Costly
Execution301ms
Transfer132 KB
Unused80%
Monthly Cost$5/mo
www.artnews.com
Other
Costly
Execution243ms
Transfer31 KB
Unused66%
Monthly Cost$4/mo
Google Tag Manager
Tag Manager
Optional
Execution183ms
Transfer153 KB
Unused43%
Monthly Cost$3/mo
cds.connatix.com
Other
Optional
Execution123ms
Transfer139 KB
Unused68%
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Optional
Execution106ms
Transfer127 KB
Unused53%
Monthly Cost$2/mo
html-load.com
Other
Optional
Execution94ms
Transfer42 KB
Monthly Cost$2/mo
www.artnews.com
Other
Optional
Execution77ms
Transfer17 KB
Monthly Cost$1/mo
pagead2.googlesyndication.com
Other
Optional
Execution67ms
Transfer0 KB
Unused64%
Monthly Cost$1/mo
daybreaklights.com
Other
Optional
Execution56ms
Transfer36 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.artnews.com adds 1805ms and costs ~$31/month
Unattributable adds 675ms and costs ~$12/month
cdn.tinypass.com adds 363ms and costs ~$6/month
ads.blogherads.com adds 301ms and costs ~$5/month
www.artnews.com adds 243ms 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.artnews.com takes 1805ms 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 675ms 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.tinypass.com takes 363ms 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
63% of cdn.tinypass.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
ads.blogherads.com takes 301ms 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
80% of ads.blogherads.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.artnews.com takes 243ms 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
66% of www.artnews.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
68% of cds.connatix.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 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
64% of pagead2.googlesyndication.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.