Re: what to look for in performance degrade under windows ?

[gary ng <garyng2000@...>]

VC8, build as DLL(which I believe is the only way to
have both lua and luasocket work together).

--- David Burgess <dburgess@gmail.com> wrote:

> Which version of MSVC and how is it linked?
> I am not sure which APIs that python uses for socket
> io but
> luasocket uses the BSD APIs on windows and these are
> relatively
> slow.
> 
> db
> 
> On 6/20/07, gary ng <garyng2000@yahoo.com> wrote:
> > Hi,
> >
> > I was writing a NBD server(which is essentially
> file
> > stream over tcp/ip). The protocol is very simple:
> A 28
> > byte header indicating either a read or write(I
> use
> > lpack to pack/unpack this header ) + actual data
> to
> > and from server. So a very simple socket based
> > program.
> >
> > I wrote both a lua version and a python version.
> Under
> > linux, lua is about 2-3x faster than python, and
> about
> > 50% of a C implementation.
> >
> > However, when I put the same code to run under
> > windows, the python version is 2x as fast as lua.
> The
> > python is about 50% of the C implementation.
> >
> > I have also tried to illiminate the file io(so
> > effectively echo back) and the result is still the
> > same.
> >
> > What would cause such a strange behaviour ?
> >
> > Both lua(luajit) and the python code are compiled
> > using MSVC on Windows and gcc under linux.
> >
> > thanks for any hint in advance.
> >
> > regards
> >
> >
> >
> >
> >
>
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