Slow numerics in Sho?

Question

Hi,

I've been doing some numerical testing of Sho, and am puzzled by how slow the matrix manipulations are. Matrix multiplication, for example, is

many times slower than Numpy/Matlab that both allegedly use the MKL multi-processor libraries. You can see from the task manager that Sho is not using all available cores. 

 

Any comments?

 

Thanks!

Answer 1

As a specific example:

 

Sho: m=rand(2000,2000), tic(),m*m,toc()

result takes 10.36s on my icore7 dual core

Matlab: m=rand(2000),tic,m*m;,toc 

this takes 1.47 s

 

 

Answer 2

OK, I found that upon initialization of Sho, the initial statement indicated that for some reason "fast math" was not enabled. After completely 

re-installing Sho, the statement went away, and now the matrix multiply speed for large arrays are comparable (if not slightly better!) than Matlab7.6.

 

Thanks!

Answer 3

Could you compare it to a newer version of MATLAB? How about other functions?

 

Thanks.