Re: Mercurial 0.4b vs git patchbomb benchmark

On Sat, Apr 30, 2005 at 07:44:17AM -0700, Adam J. Richter wrote:

	I'd like to mention a couple of possible optimizations
for both the with and without compression approaches.

	If you remove the gzip compression, then I imagine you could
do much of the IO of checking out files via sendfile, without
ever copying data to program space or even changing the program's
memory map.  There apparently exists a python sendfile module.

	If this mercurial were written in C, much of the rest of
the IO could be optimized with mmap (to reduce copies) and writev
in the absense of a compression pass.  I don't know enough about
python to know if these optimizations are available.

Python can do mmap, not sure about writev. 

But I'm currently still in the "keep it as simple as possible" stage.
There's a bunch of room for optimization still, but if I do it all
now, it'll make things hard when I run into the next design change.

And there's still some important core work that needs doing - checkout
and commit need to be a subcase of the core merge code.

-- 
Mathematics is the supreme nostalgia of our time.