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
45% third-party, 0 ms blocking
REVIEW
45% third-party, 0 ms blocking
Info::
i
Third-party code accounts for 45% of page weight (1.9 MiB of 4.1 MiB)
Info::
✓
Third-party blocking time is low (0 ms)
55%
45%
First-party Third-party
C
Image Optimization
Action
26 images, 0 KB saveable
REVIEW
26 images, 0 KB saveable
Warning::
!
https://explodingtopics.com/static/images/home-pag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/sales/Sn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/home-pag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.google.com/s2/favicons?domain=google.c... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.google.com/s2/favicons?domain=youtube.... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.google.com/s2/favicons?domain=facebook... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/sales/Ml... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/sales/pi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/sales/su... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/identify... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/sales/ai... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/sales/pe... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://explodingtopics.com/static/images/home-pag... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
26images1012 KB
0oversized-0 KB
10legacy format
13missing 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
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 (79 KB)
PASS
4 fonts (79 KB)
Info::
i
4 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
4
79 KB total
Render-blocking
0
of 4
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
xn7gYHE41ni1AdIRggexSvf...woff2swap
Size24 KB
Load time31 ms
Start796 ms
RiskFOUT — text flashes from fallback to web font
qWcuB6mzpYL7AJ2VfdQR1t-...woff2swap
Size21 KB
Load time27 ms
Start797 ms
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size34 KB
Load time24 ms
Start3.5 s
RiskFOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a...woff2swap
Size0 KB
Load time0 ms
Start4.7 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+
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
88 requests over 6454ms
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-party1690ms · 517KB · €18/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
cdn.cookiehub.eu
cdn.cookiehub.eu
Other
557ms
38 KB
—
€6/mo
Costly
www.gstatic.com
www.gstatic.com
Other
395ms
0 KB
49%
€4/mo
Costly
Unattributable
Unattributable
Other
288ms
0 KB
—
€3/mo
Costly
Microsoft Clarity
scripts.clarity.ms
Session Replay
139ms
26 KB
—
€2/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
130ms
174 KB
42%
€1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
102ms
133 KB
45%
€1/mo
Optional
Google Tag Manager
www.googletagmanager.com
Tag Manager
78ms
146 KB
49%
€1/mo
Optional
cdn.cookiehub.eu
Other
Costly
Execution557ms
Transfer38 KB
Monthly Cost€6/mo
www.gstatic.com
Other
Costly
Execution395ms
Transfer0 KB
Unused49%
Monthly Cost€4/mo
Unattributable
Other
Costly
Execution288ms
Transfer0 KB
Monthly Cost€3/mo
Microsoft Clarity
Session Replay
Optional
Execution139ms
Transfer26 KB
Monthly Cost€2/mo
Google Tag Manager
Tag Manager
Optional
Execution130ms
Transfer174 KB
Unused42%
Monthly Cost€1/mo
Google Tag Manager
Tag Manager
Optional
Execution102ms
Transfer133 KB
Unused45%
Monthly Cost€1/mo
Google Tag Manager
Tag Manager
Optional
Execution78ms
Transfer146 KB
Unused49%
Monthly Cost€1/mo
These scripts may cost more than they're worth
cdn.cookiehub.eu adds 557ms and costs ~€6/month
www.gstatic.com adds 395ms and costs ~€4/month
Unattributable adds 288ms 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
cdn.cookiehub.eu takes 557ms 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.gstatic.com takes 395ms 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 288ms 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.