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
2.0 MB transferred, 78 requests
REVIEW
2.0 MB transferred, 78 requests
Info::
i
Page weighs 7.6 MB (2.0 MB transferred)
Warning::
!
JavaScript is 1.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.7 MB
Info::
i
78 HTTP requests
Info::
i
Estimated 0.43 g CO2 per page load
2.0 MBtransferred
78 requests
0.43 g CO2 per page load
JavaScript1.7 MiB81%
Images196.4 KiB9%
Fonts76.7 KiB4%
CSS62.3 KiB3%
Other25.6 KiB1%
HTML17.2 KiB1%
Other10.6 KiB1%
Other1.8 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
B
Image Optimization
5 images, 0 KB saveable
REVIEW
5 images, 0 KB saveable
Info::
✓
All images are well-optimized
5images196 KB
0oversized-0 KB
5legacy 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
2 fonts (77 KB)
PASS
2 fonts (77 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
77 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
JTUSjIg1_i6t8kCHKm459Wl...woff2swap
Size35 KB
Load time7 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time5 ms
Start2.8 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)
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
No optimization needed
PASS
No optimization needed
Info::
✓
No resource hint issues
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
78 requests over 3207ms
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-party3624ms · 1035KB · $48/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
secure.netfirms.com
secure.netfirms.com
Other
512ms
162 KB
36%
$7/mo
Costly
Unattributable
Unattributable
Other
497ms
0 KB
—
$7/mo
Costly
apps.usw2.pure.cloud
apps.usw2.pure.cloud
Other
485ms
167 KB
52%
$6/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
415ms
152 KB
42%
$6/mo
Costly
secure.netfirms.com
secure.netfirms.com
Other
401ms
14 KB
—
$5/mo
Costly
secure.netfirms.com
secure.netfirms.com
Other
340ms
0 KB
—
$5/mo
Costly
cdn.sift.com
cdn.sift.com
Other
175ms
20 KB
—
$2/mo
Optional
OneTrust
cdn.cookielaw.org
Consent
174ms
107 KB
62%
$2/mo
Essential
Google Tag Manager
www.googletagmanager.com
Tag Manager
153ms
134 KB
59%
$2/mo
Optional
secure.netfirms.com
secure.netfirms.com
Other
109ms
6 KB
—
$1/mo
Optional
OneTrust
cdn.cookielaw.org
Consent
94ms
9 KB
—
$1/mo
Essential
static.registration.bluehost.com
static.registration.bluehost.com
Other
83ms
37 KB
—
$1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
79ms
151 KB
71%
$1/mo
Optional
secure.netfirms.com
secure.netfirms.com
Other
57ms
36 KB
58%
$1/mo
Optional
secure.netfirms.com
secure.netfirms.com
Other
51ms
40 KB
—
$1/mo
Optional
secure.netfirms.com
Other
Costly
Execution512ms
Transfer162 KB
Unused36%
Monthly Cost$7/mo
Unattributable
Other
Costly
Execution497ms
Transfer0 KB
Monthly Cost$7/mo
apps.usw2.pure.cloud
Other
Costly
Execution485ms
Transfer167 KB
Unused52%
Monthly Cost$6/mo
Google Tag Manager
Tag Manager
Costly
Execution415ms
Transfer152 KB
Unused42%
Monthly Cost$6/mo
secure.netfirms.com
Other
Costly
Execution401ms
Transfer14 KB
Monthly Cost$5/mo
secure.netfirms.com
Other
Costly
Execution340ms
Transfer0 KB
Monthly Cost$5/mo
cdn.sift.com
Other
Optional
Execution175ms
Transfer20 KB
Monthly Cost$2/mo
OneTrust
Consent
Essential
Execution174ms
Transfer107 KB
Unused62%
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Optional
Execution153ms
Transfer134 KB
Unused59%
Monthly Cost$2/mo
secure.netfirms.com
Other
Optional
Execution109ms
Transfer6 KB
Monthly Cost$1/mo
OneTrust
Consent
Essential
Execution94ms
Transfer9 KB
Monthly Cost$1/mo
static.registration.bluehost.com
Other
Optional
Execution83ms
Transfer37 KB
Monthly Cost$1/mo
Google Tag Manager
Tag Manager
Optional
Execution79ms
Transfer151 KB
Unused71%
Monthly Cost$1/mo
secure.netfirms.com
Other
Optional
Execution57ms
Transfer36 KB
Unused58%
Monthly Cost$1/mo
secure.netfirms.com
Other
Optional
Execution51ms
Transfer40 KB
Monthly Cost$1/mo
These scripts may cost more than they're worth
secure.netfirms.com adds 512ms and costs ~$7/month
Unattributable adds 497ms and costs ~$7/month
apps.usw2.pure.cloud adds 485ms and costs ~$6/month
Google Tag Manager adds 415ms and costs ~$6/month
secure.netfirms.com adds 401ms and costs ~$5/month
secure.netfirms.com adds 340ms and costs ~$5/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
secure.netfirms.com takes 512ms 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 497ms 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 485ms 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
52% 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
Google Tag Manager takes 415ms 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
secure.netfirms.com takes 401ms 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
secure.netfirms.com takes 340ms 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
62% of OneTrust'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
59% 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
71% 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
58% of secure.netfirms.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.