# Speed of computing using sage in different platforms: User experiences

I want to know from the users of sage, their feeling on handling computations using sage on different platforms. Actually I have a windows pc and sage works by virtual machine inside it. So the computations are very slow. I am trying to compute the ray class groups associated with number fields. But the problem is: Somehow using virtual machine Sage runs too slowly, it even takes time to enter the data by the keyboard.

So I am thinking to buy a computer on some other platform (Ubuntu or Apple macbooks) (within around 1000 euro ) so that I can make some computations in a reasonable speed. I like to have user experiences on this issue.

May be building Sage from source will give a better performance? Also, a performance of underlying libraries may be an issue; once I have encountered significant performance issue because of unoptimized linear algebra library, see this topic