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, 75 requests
REVIEW
2.0 MB transferred, 75 requests
Info::
i
Page weighs 7.1 MB (2.0 MB transferred)
Warning::
!
JavaScript is 1.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.6 MB
Info::
i
75 HTTP requests
Info::
i
Estimated 0.41 g CO2 per page load
2.0 MBtransferred
75 requests
0.41 g CO2 per page load
JavaScript1.6 MiB84%
HTML129.5 KiB6%
Fonts96.2 KiB5%
Other40.5 KiB2%
Other30.7 KiB2%
Images22.1 KiB1%
CSS7.9 KiB0%
Other3.6 KiB0%
Other820 B0%
Other0 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
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+
Image Optimization
6 images, 0 KB saveable
PASS
6 images, 0 KB saveable
Info::
✓
All images are well-optimized
6images22 KB
0oversized-0 KB
0legacy format
0missing dimensionsCLS risk
A+
Font Loading
2 fonts (96 KB)
PASS
2 fonts (96 KB)
Info::
i
2 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
2
96 KB total
Render-blocking
0
of 2
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
e4af272ccee01ff0-s.p.woff2woff2swap
Size48 KB
Load time38 ms
Start657 ms
RiskFOUT — text flashes from fallback to web font
e4af272ccee01ff0-s.p.woff2woff2swap
Size48 KB
Load time19 ms
Start875 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
12 hints, 0 missing preconnects
PASS
12 hints, 0 missing preconnects
Info::
✓
Page uses 12 resource hint(s)
Current Resource Hints
preconnect
10
preload
2
dns-prefetch—
prefetch—
12 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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall
75 requests over 2803ms
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-party4893ms · 1655KB · €53/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
web-assets.myfitnesspal.com
web-assets.myfitnesspal.com
Other
1394ms
1307 KB
88%
€15/mo
Costly
web-assets.myfitnesspal.com
web-assets.myfitnesspal.com
Other
1144ms
57 KB
38%
€12/mo
Costly
www.myfitnesspal.com
www.myfitnesspal.com
Other
782ms
127 KB
—
€8/mo
Costly
Unattributable
Unattributable
Other
456ms
0 KB
—
€5/mo
Costly
www.myfitnesspal.com
www.myfitnesspal.com
Other
324ms
0 KB
—
€4/mo
Costly
web-assets.myfitnesspal.com
web-assets.myfitnesspal.com
Other
238ms
39 KB
—
€3/mo
Costly
cdn.privacy-mgmt.com
cdn.privacy-mgmt.com
Other
215ms
42 KB
—
€2/mo
Costly
cdn.privacy-mgmt.com
cdn.privacy-mgmt.com
Other
179ms
42 KB
54%
€2/mo
Optional
static.cloudflareinsights.com
static.cloudflareinsights.com
Other
87ms
11 KB
—
€1/mo
Optional
cdn.privacy-mgmt.com
cdn.privacy-mgmt.com
Other
74ms
29 KB
—
€1/mo
Optional
web-assets.myfitnesspal.com
Other
Costly
Execution1394ms
Transfer1307 KB
Unused88%
Monthly Cost€15/mo
web-assets.myfitnesspal.com
Other
Costly
Execution1144ms
Transfer57 KB
Unused38%
Monthly Cost€12/mo
www.myfitnesspal.com
Other
Costly
Execution782ms
Transfer127 KB
Monthly Cost€8/mo
Unattributable
Other
Costly
Execution456ms
Transfer0 KB
Monthly Cost€5/mo
www.myfitnesspal.com
Other
Costly
Execution324ms
Transfer0 KB
Monthly Cost€4/mo
web-assets.myfitnesspal.com
Other
Costly
Execution238ms
Transfer39 KB
Monthly Cost€3/mo
cdn.privacy-mgmt.com
Other
Costly
Execution215ms
Transfer42 KB
Monthly Cost€2/mo
cdn.privacy-mgmt.com
Other
Optional
Execution179ms
Transfer42 KB
Unused54%
Monthly Cost€2/mo
static.cloudflareinsights.com
Other
Optional
Execution87ms
Transfer11 KB
Monthly Cost€1/mo
cdn.privacy-mgmt.com
Other
Optional
Execution74ms
Transfer29 KB
Monthly Cost€1/mo
These scripts may cost more than they're worth
web-assets.myfitnesspal.com adds 1394ms and costs ~€15/month
web-assets.myfitnesspal.com adds 1144ms and costs ~€12/month
www.myfitnesspal.com adds 782ms and costs ~€8/month
Unattributable adds 456ms and costs ~€5/month
www.myfitnesspal.com adds 324ms and costs ~€4/month
web-assets.myfitnesspal.com adds 238ms and costs ~€3/month
cdn.privacy-mgmt.com adds 215ms 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
web-assets.myfitnesspal.com takes 1394ms 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
88% of web-assets.myfitnesspal.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
web-assets.myfitnesspal.com takes 1144ms 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.myfitnesspal.com takes 782ms 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 456ms 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.myfitnesspal.com takes 324ms 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
web-assets.myfitnesspal.com takes 238ms 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.privacy-mgmt.com takes 215ms 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
54% of cdn.privacy-mgmt.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.