Re: why is octave 4.2.0 x86_64-w64-mingw32 so slow?

[Carlo De Falco]

> On 24 Oct 2017, at 03:17, Nicholas Jankowski <address@hidden> wrote:
> 
>  but it really depends on how big a matrix you're calling them on.
from the large number of calls to log and exp it seems they are not being 
called on a matrix but rather called repeatedly in a loop.
as log and exp are taking around 50% of the total run time, I think absence of 
vectorization is most likely the cause of he slowdown 
in this case:

  
https://www.gnu.org/software/octave/doc/interpreter/Vectorization-and-Faster-Code-Execution.html#Vectorization-and-Faster-Code-Execution

of course this is just a guess as I haven't actually seen the code.
c.