From: William James <w_a_x_man@...>
Date: 2006-08-05T03:05:07+09:00
Subject: Re: For performance, write it in C - Part 3, Source code now available


Peter Hickman wrote:
> Peter Hickman wrote:
> > I changed the use of the bool data type (which is really an int) to
> > char and shrunk the size of the program and sped it up.
> >
> > real    0m1.885s
> > user    0m1.649s
> > sys     0m0.168s
> >
> > I think this is because the top most loop, when processing the top
> > row, basically just zooms down a given row of the compared array. With
> > four chars being packed in where one bool would be more of the tests
> > will be using data that is available in the CPUs cache.
> >
> >
> >
> Sorry but I have to retract these timings. They were from the tests to
> find the best gcc compiler settings and do not include the Perl pre
> calculation for each run so they cannot be compared to any of the other
> timings. Sorry about that.

I wish that you would dump Perl and do everything in C.