Where to place the Initialize blocks

Hi.
I like to know where you place the initialize blocks. I found out that if I place a initialize block on the screen it gos very slow. But if I delete it again it is mutch faster in the browser.
Can I place all the initialize blocks in one screen? or do they have to be on the same screem.

No I don’t think so. I think it is okay to place them all on the same screen.