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
1.8 MB transferred, 99 requests
REVIEW
1.8 MB transferred, 99 requests
Info::
i
Page weighs 5.2 MB (1.8 MB transferred)
Warning::
!
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
i
99 HTTP requests
Info::
i
Estimated 0.37 g CO2 per page load
1.8 MBtransferred
99 requests
0.37 g CO2 per page load
JavaScript1.3 MiB74%
Images210.5 KiB12%
Fonts114.8 KiB6%
HTML70.7 KiB4%
CSS37.1 KiB2%
Other27.4 KiB2%
Other7.6 KiB0%
Other1.2 KiB0%
Other771 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
C
Image Optimization
Action
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Warning::
!
https://www.pravda.com.ua/up/i/qixotte.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
https://www.pravda.com.ua/up/i/interfax.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
!
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
17images211 KB
0oversized-0 KB
11legacy format
3missing 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
Performance issues directly impact user engagement and conversion rates.
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
7 fonts (115 KB)
PASS
7 fonts (115 KB)
Info::
i
7 font(s) use font-display: swap (FOUT risk but functional)
Web fonts
7
115 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
TransferFOIT (block)FOUT (swap)
va9B4kDNxMZdWfMOD5VnLK3...woff2swap
Size7 KB
Load time30 ms
Start316 ms
RiskFOUT — text flashes from fallback to web font
va9B4kDNxMZdWfMOD5VnLK3...woff2swap
Size17 KB
Load time67 ms
Start317 ms
RiskFOUT — text flashes from fallback to web font
va9E4kDNxMZdWfMOD5Vvl4j...woff2swap
Size17 KB
Load time38 ms
Start317 ms
RiskFOUT — text flashes from fallback to web font
va9B4kDNxMZdWfMOD5VnSKz...woff2swap
Size17 KB
Load time67 ms
Start317 ms
RiskFOUT — text flashes from fallback to web font
va9E4kDNxMZdWfMOD5Vvk4j...woff2swap
Size7 KB
Load time45 ms
Start318 ms
RiskFOUT — text flashes from fallback to web font
va9B4kDNxMZdWfMOD5VnSKz...woff2swap
Size7 KB
Load time47 ms
Start318 ms
RiskFOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX...woff2swap
Size42 KB
Load time33 ms
Start1.2 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
13 hints, 0 missing preconnects
PASS
13 hints, 0 missing preconnects
Info::
✓
Page uses 13 resource hint(s)
Current Resource Hints
preconnect
6
preload—
dns-prefetch
7
prefetch—
13 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
99 requests over 4442ms
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-party4473ms · 1269KB · ₴2474/mo
Script
Category
Execution
Transfer
Unused
Monthly Cost
Verdict
cdn.membrana.media
cdn.membrana.media
Other
743ms
184 KB
50%
₴411/mo
Costly
Unattributable
Unattributable
Other
509ms
0 KB
—
₴282/mo
Costly
www.pravda.com.ua
www.pravda.com.ua
Other
492ms
50 KB
—
₴272/mo
Costly
www.pravda.com.ua
www.pravda.com.ua
Other
348ms
0 KB
—
₴192/mo
Costly
cdn.onthe.io
cdn.onthe.io
Other
345ms
32 KB
—
₴191/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
337ms
175 KB
40%
₴187/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
318ms
169 KB
39%
₴176/mo
Costly
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
291ms
70 KB
53%
₴161/mo
Costly
fundingchoicesmessages.google.com
fundingchoicesmessages.google.com
Other
274ms
68 KB
—
₴152/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
250ms
157 KB
42%
₴138/mo
Costly
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
246ms
188 KB
70%
₴136/mo
Costly
Google Tag Manager
www.googletagmanager.com
Tag Manager
165ms
122 KB
53%
₴91/mo
Costly
securepubads.g.doubleclick.net
securepubads.g.doubleclick.net
Other
92ms
34 KB
—
₴51/mo
Costly
gaua.hit.gemius.pl
gaua.hit.gemius.pl
Other
63ms
19 KB
—
₴35/mo
Optional
cdn.membrana.media
Other
Costly
Execution743ms
Transfer184 KB
Unused50%
Monthly Cost₴411/mo
Unattributable
Other
Costly
Execution509ms
Transfer0 KB
Monthly Cost₴282/mo
www.pravda.com.ua
Other
Costly
Execution492ms
Transfer50 KB
Monthly Cost₴272/mo
www.pravda.com.ua
Other
Costly
Execution348ms
Transfer0 KB
Monthly Cost₴192/mo
cdn.onthe.io
Other
Costly
Execution345ms
Transfer32 KB
Monthly Cost₴191/mo
Google Tag Manager
Tag Manager
Costly
Execution337ms
Transfer175 KB
Unused40%
Monthly Cost₴187/mo
Google Tag Manager
Tag Manager
Costly
Execution318ms
Transfer169 KB
Unused39%
Monthly Cost₴176/mo
fundingchoicesmessages.google.com
Other
Costly
Execution291ms
Transfer70 KB
Unused53%
Monthly Cost₴161/mo
fundingchoicesmessages.google.com
Other
Costly
Execution274ms
Transfer68 KB
Monthly Cost₴152/mo
Google Tag Manager
Tag Manager
Costly
Execution250ms
Transfer157 KB
Unused42%
Monthly Cost₴138/mo
securepubads.g.doubleclick.net
Other
Costly
Execution246ms
Transfer188 KB
Unused70%
Monthly Cost₴136/mo
Google Tag Manager
Tag Manager
Costly
Execution165ms
Transfer122 KB
Unused53%
Monthly Cost₴91/mo
securepubads.g.doubleclick.net
Other
Costly
Execution92ms
Transfer34 KB
Monthly Cost₴51/mo
gaua.hit.gemius.pl
Other
Optional
Execution63ms
Transfer19 KB
Monthly Cost₴35/mo
These scripts may cost more than they're worth
cdn.membrana.media adds 743ms and costs ~₴411/month
Unattributable adds 509ms and costs ~₴282/month
www.pravda.com.ua adds 492ms and costs ~₴272/month
www.pravda.com.ua adds 348ms and costs ~₴192/month
cdn.onthe.io adds 345ms and costs ~₴191/month
Google Tag Manager adds 337ms and costs ~₴187/month
Google Tag Manager adds 318ms and costs ~₴176/month
fundingchoicesmessages.google.com adds 291ms and costs ~₴161/month
fundingchoicesmessages.google.com adds 274ms and costs ~₴152/month
Google Tag Manager adds 250ms and costs ~₴138/month
securepubads.g.doubleclick.net adds 246ms and costs ~₴136/month
Google Tag Manager adds 165ms and costs ~₴91/month
securepubads.g.doubleclick.net adds 92ms and costs ~₴51/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
cdn.membrana.media takes 743ms 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 cdn.membrana.media'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
Unattributable takes 509ms 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.pravda.com.ua takes 492ms 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.pravda.com.ua takes 348ms 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.onthe.io takes 345ms 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 337ms 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 318ms 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
fundingchoicesmessages.google.com takes 291ms 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
53% of fundingchoicesmessages.google.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
fundingchoicesmessages.google.com takes 274ms 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 250ms 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
securepubads.g.doubleclick.net takes 246ms 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
70% of securepubads.g.doubleclick.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
Google Tag Manager takes 165ms 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
53% 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
securepubads.g.doubleclick.net takes 92ms 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.