Adding a Cache-Control header can significantly improve repeat-visit performance.
C
Image Optimization
Action
42 images, 0 KB saveable
REVIEW
42 images, 0 KB saveable
Warning::
!
https://images-assets.project1content.com/assets/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://app-assets.project1content.com/tour/assets... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets.project1content.com/assets/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media-public-ht.project1content.com/m=eeEa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets-ht.project1content.com/BangB... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets.project1content.com/assets/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://app-assets.project1content.com/tour/assets... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets-ht.project1content.com/Commo... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets.project1content.com/assets/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets.project1content.com/assets/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://media-public-ht.project1content.com/m=eeEa... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets-ht.project1content.com/BangB... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets-ht.project1content.com/BangB... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets-ht.project1content.com/BangB... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets.project1content.com/assets/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://images-assets.project1content.com/assets/b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
42images1.7 MB
0oversized-0 KB
41legacy format
16missing 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
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
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
i
Main HTML response has no Cache-Control header
Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
i
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
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
4 fonts (63 KB)
PASS
4 fonts (63 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
63 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
memSYaGs126MiZpBA-UvWbX...woff2swap
Size13 KB
Load time31 ms
Start787 ms
RiskFOUT — text flashes from fallback to web font
KFOMCnqEu92Fr1ME7kSn66a...woff2swap
Size16 KB
Load time6 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time43 ms
Start2.0 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size0 KB
Load time0 ms
Start3.2 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+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
✓
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+
Compression Algorithm
Main response uses brotli
PASS
Main response uses brotli
Info::
✓
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+
LCP Image Preload
LCP preload audit not available
PASS
LCP preload audit not available
Info::
✓
LCP image preload audit not available for this scan
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
✓
`Vary` header declared: Accept-Encoding
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
✓
`ETag` present -- conditional GET supported
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
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
!
Total JS execution time is 13.4 s -- over the 3.5s budget
Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
✓
No CSS performance depth issues detected
Network Waterfall
118 requests over 3766ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
72%of JavaScript execution is third-party
First-party Third-party9676ms · 1420KB · $128/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
app-assets.project1content.com
app-assets.project1content.com
Other
2850ms
134 KB
50%
$38/mo
Costly
app-assets.project1content.com
app-assets.project1content.com
Other
2814ms
707 KB
56%
$37/mo
Costly
www.gstatic.com
www.gstatic.com
Other
2529ms
0 KB
50%
$34/mo
Costly
onenavigation.project1content.com
onenavigation.project1content.com
Other
750ms
195 KB
49%
$10/mo
Costly
onelist.project1content.com
onelist.project1content.com
Other
732ms
384 KB
66%
$10/mo
Costly
app-assets.project1content.com
Other
Costly
Execution2850ms
Transfer134 KB
Unused50%
Monthly Cost$38/mo
app-assets.project1content.com
Other
Costly
Execution2814ms
Transfer707 KB
Unused56%
Monthly Cost$37/mo
www.gstatic.com
Other
Costly
Execution2529ms
Transfer0 KB
Unused50%
Monthly Cost$34/mo
onenavigation.project1content.com
Other
Costly
Execution750ms
Transfer195 KB
Unused49%
Monthly Cost$10/mo
onelist.project1content.com
Other
Costly
Execution732ms
Transfer384 KB
Unused66%
Monthly Cost$10/mo
These scripts may cost more than they're worth
app-assets.project1content.com adds 2850ms and costs ~$38/month
app-assets.project1content.com adds 2814ms and costs ~$37/month
www.gstatic.com adds 2529ms and costs ~$34/month
onenavigation.project1content.com adds 750ms and costs ~$10/month
onelist.project1content.com adds 732ms and costs ~$10/month
72% 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
app-assets.project1content.com takes 2850ms 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 app-assets.project1content.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
app-assets.project1content.com takes 2814ms 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 app-assets.project1content.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.gstatic.com takes 2529ms 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
onenavigation.project1content.com takes 750ms 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
onelist.project1content.com takes 732ms 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 onelist.project1content.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.