pypy on windows much slower than linux/mac when using complex number type?

[Chris Angelico]

On Wed, Sep 21, 2016 at 6:38 AM, Irmen de Jong <irmen.NOSPAM at xs4all.nl> wrote:
>  Windows: 64 bits Windows 7, Intel Core 2 Quad 3.4 Ghz
>  Linux: 32 bits Mint 18, Virtualbox VM on above windows machine
>  Mac mini: OS X 10.11.6, Intel Core 2 Duo 2.53 Ghz
>
> The test code I've been using is here:
>  https://gist.github.com/irmen/c6b12b4cf88a6a4fcf5ff721c7089078
>
> Test results:
>                       function:  mandel   / iterations
>  Mac mini, Pypy 5.4.1 (64-bit):  0.81 sec / 0.65 sec
>  Linux, Pypy 5.1 (32-bit):       1.06 sec / 0.64 sec
>  Windows, Pypy 5.4.1 (32-bit):   5.59 sec / 2.87 sec
>
>
> What could cause such a huge difference?

Dunno if it's the cause or not, but you're running a 32-bit PyPy on a
64-bit Windows. I could well imagine that that has some odd
significance.

ChrisA