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Ccs and java script

Dman12345
Tourist
11 0 1

Hi guys is it true ccs and java script grow automatically over time as a result slowing down your website? 

Replies 2 (2)
Dman12345
Tourist
11 0 1
Dman12345
Tourist
11 0 1

Screenshot_20201126_134826_com.android.chrome.jpg

 someone is claiming this is good?