MODX Revolution 2.1.5-pl very slow

I did it. No effect.

I try to install on xampp and in two server but the problem is the same.
As long as nobody makes any changes to the site fontend is fast when you change any resource site back slow.

I fond in the modx documentation this sentence:
Clearing your entire cache frequently could slow down your system

But if you work on site and modify articles you clear cache.
So I am forced to abandon MODx seen that a slow site does not fit on google.

Try Modx 1.0. Its very good and SEO system without cache problems.

I use Modx 1.0 for all site but i try revo because i need the new function. But i see that modx revo non work well. The problem now is that my site was posted how do I rebuild them all?

How do you disable caching MODx ?