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.
B
Third-Party Impact
59% third-party, 0 ms blocking
REVIEW
59% third-party, 0 ms blocking
Warning::
!
Third-party code accounts for 59% of page weight (1.6 MiB of 2.7 MiB)
Info::
✓
Third-party blocking time is low (0 ms)
41%
59%
First-party Third-party
C
Image Optimization
Action
55 images, 0 KB saveable
REVIEW
55 images, 0 KB saveable
Warning::
!
https://sizzling-hot-deluxe-slot.com/static/img_1/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/static/img_1/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/static/img_1/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://sizzling-hot-deluxe-slot.com/wp-content/up... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
55images942 KB
0oversized-0 KB
55legacy 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
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 (95 KB)
PASS
4 fonts (95 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
95 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time83 ms
Start208 ms
RiskFOUT — text flashes from fallback to web font
z7NFdQDnbTkabZAIOl9il_O...woff2swap
Size10 KB
Load time85 ms
Start209 ms
RiskFOUT — text flashes from fallback to web font
z7NFdQDnbTkabZAIOl9il_O...woff2swap
Size9 KB
Load time50 ms
Start248 ms
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time21 ms
Start677 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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
✓
Page uses 1 resource hint(s)
Current Resource Hints
preconnect—
preload—
dns-prefetch
1
prefetch—
1 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
117 requests over 4464ms
INFO
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
44%of JavaScript execution is third-party
First-party Third-party1900ms · 581KB · $25/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
Unattributable
Unattributable
Other
764ms
0 KB
—
$10/mo
Costly
mc.yandex.ru
mc.yandex.ru
Other
452ms
85 KB
52%
$6/mo
Costly
www.gstatic.com
www.gstatic.com
Other
301ms
362 KB
67%
$4/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
224ms
113 KB
61%
$3/mo
Costly
Google Analytics
www.google-analytics.com
Analytics
158ms
21 KB
—
$2/mo
Optional
Unattributable
Other
Costly
Execution764ms
Transfer0 KB
Monthly Cost$10/mo
mc.yandex.ru
Other
Costly
Execution452ms
Transfer85 KB
Unused52%
Monthly Cost$6/mo
www.gstatic.com
Other
Costly
Execution301ms
Transfer362 KB
Unused67%
Monthly Cost$4/mo
Google Tag Manager
Tag Manager
Costly
Execution224ms
Transfer113 KB
Unused61%
Monthly Cost$3/mo
Google Analytics
Analytics
Optional
Execution158ms
Transfer21 KB
Monthly Cost$2/mo
These scripts may cost more than they're worth
Unattributable adds 764ms and costs ~$10/month
mc.yandex.ru adds 452ms and costs ~$6/month
www.gstatic.com adds 301ms and costs ~$4/month
Google Tag Manager adds 224ms and costs ~$3/month
44% of JavaScript execution time comes from third-party scripts.
Why this matters
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
Unattributable takes 764ms 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
mc.yandex.ru takes 452ms 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 mc.yandex.ru'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 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
67% of www.gstatic.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
Google Tag Manager takes 224ms 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
61% 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.