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
Image Optimization
Action
36 images, 0 KB saveable
REVIEW
36 images, 0 KB saveable
Warning::
!
https://i05.appmifile.com/786_operator_es/01/04/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i05.appmifile.com/976_operator_es/16/04/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i05.appmifile.com/energy/a-g/Class_Arrows_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i05.appmifile.com/726_operator_es/15/04/20... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i05.appmifile.com/energy/a-g/Class_Arrows_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i05.appmifile.com/energy/a-g/Class_Arrows_... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://i01.appmifile.com/webfile/globalimg/i18n/o... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
36images936 KB
0oversized-0 KB
11legacy format
7missing 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
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
3 fonts (180 KB)
PASS
3 fonts (180 KB)
Info::
i
3 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
3
180 KB total
Render-blocking
0
of 3
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
x-font-woff2;charset=ut...woff2swap
Size39 KB
Load time117 ms
Start1.3 s
RiskFOUT — text flashes from fallback to web font
4.woff2woff2swap
Size35 KB
Load time17 ms
Start1.4 s
RiskFOUT — text flashes from fallback to web font
getttfswap
Size106 KB
Load time6 ms
Start4.7 s
RiskFOUT — text flashes from fallback to web font
Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~85 KB and ~170 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
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
149 requests over 7270ms
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-party24550ms · 1286KB · $326/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
www.mi.com
www.mi.com
Other
16251ms
30 KB
—
$216/mo
Costly
www.mi.com
www.mi.com
Other
3997ms
344 KB
27%
$53/mo
Costly
Unattributable
Unattributable
Other
1091ms
0 KB
—
$14/mo
Costly
browser.sentry-cdn.com
browser.sentry-cdn.com
Other
905ms
29 KB
—
$12/mo
Costly
www.mi.com
www.mi.com
Other
895ms
52 KB
—
$12/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
278ms
182 KB
36%
$4/mo
Costly
oc-cdn-public-eur.azureedge.net
oc-cdn-public-eur.azureedge.net
Other
266ms
113 KB
59%
$4/mo
Costly
consent.trustarc.com
consent.trustarc.com
Other
190ms
14 KB
—
$3/mo
Optional
www.mi.com
www.mi.com
Other
166ms
175 KB
57%
$2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
154ms
115 KB
58%
$2/mo
Optional
s.go-mpulse.net
s.go-mpulse.net
Other
103ms
46 KB
—
$1/mo
Optional
consent.trustarc.com
consent.trustarc.com
Other
68ms
36 KB
64%
$1/mo
Optional
www.mi.com
www.mi.com
Other
64ms
52 KB
56%
$1/mo
Optional
www.mi.com
www.mi.com
Other
63ms
23 KB
—
$1/mo
Optional
i02.appmifile.com
i02.appmifile.com
Other
59ms
75 KB
70%
$1/mo
Optional
www.mi.com
Other
Costly
Execution16251ms
Transfer30 KB
Monthly Cost$216/mo
www.mi.com
Other
Costly
Execution3997ms
Transfer344 KB
Unused27%
Monthly Cost$53/mo
Unattributable
Other
Costly
Execution1091ms
Transfer0 KB
Monthly Cost$14/mo
browser.sentry-cdn.com
Other
Costly
Execution905ms
Transfer29 KB
Monthly Cost$12/mo
www.mi.com
Other
Costly
Execution895ms
Transfer52 KB
Monthly Cost$12/mo
Google Tag Manager
Tag Manager
Costly
Execution278ms
Transfer182 KB
Unused36%
Monthly Cost$4/mo
oc-cdn-public-eur.azureedge.net
Other
Costly
Execution266ms
Transfer113 KB
Unused59%
Monthly Cost$4/mo
consent.trustarc.com
Other
Optional
Execution190ms
Transfer14 KB
Monthly Cost$3/mo
www.mi.com
Other
Optional
Execution166ms
Transfer175 KB
Unused57%
Monthly Cost$2/mo
Google Tag Manager
Tag Manager
Optional
Execution154ms
Transfer115 KB
Unused58%
Monthly Cost$2/mo
s.go-mpulse.net
Other
Optional
Execution103ms
Transfer46 KB
Monthly Cost$1/mo
consent.trustarc.com
Other
Optional
Execution68ms
Transfer36 KB
Unused64%
Monthly Cost$1/mo
www.mi.com
Other
Optional
Execution64ms
Transfer52 KB
Unused56%
Monthly Cost$1/mo
www.mi.com
Other
Optional
Execution63ms
Transfer23 KB
Monthly Cost$1/mo
i02.appmifile.com
Other
Optional
Execution59ms
Transfer75 KB
Unused70%
Monthly Cost$1/mo
These scripts may cost more than they're worth
www.mi.com adds 16251ms and costs ~$216/month
www.mi.com adds 3997ms and costs ~$53/month
Unattributable adds 1091ms and costs ~$14/month
browser.sentry-cdn.com adds 905ms and costs ~$12/month
www.mi.com adds 895ms and costs ~$12/month
Google Tag Manager adds 278ms and costs ~$4/month
oc-cdn-public-eur.azureedge.net adds 266ms 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.mi.com takes 16251ms 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.mi.com takes 3997ms 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 1091ms 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
browser.sentry-cdn.com takes 905ms 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.mi.com takes 895ms 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 278ms 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
oc-cdn-public-eur.azureedge.net takes 266ms 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
59% of oc-cdn-public-eur.azureedge.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
57% of www.mi.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
58% 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 consent.trustarc.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
56% of www.mi.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
70% of i02.appmifile.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.