[darcs-devel] darcs patch: (Re)upgrade createPS and generatePS to D... (and 8 more)

[David Roundy]

On Wed, Feb 06, 2008 at 04:42:02PM +0000, Eric Kow wrote:
> So, I haven't had a chance to look into the freezing function yet, but
> I did do an informal performance comparison using the Data.ByteString
> version and the --disable-bytestring version.
> 
> In short, the bytestring upgrade helps... a little bit.
> 
> Doing a local get of the GHC repository, best of three trials, takes 2
> minutes and 15 seconds (--disable-bytestring) and 1 minute 57 seconds
> (Data.ByteString).  This is a 13% improvement in my calculations
> (18/135s), which is not bad considering how little it cost us to
> implement.

Sounds great!

Also worth testing is

time darcs pull -a && time darcs obliterate --last 100 -a

which you should repeat a few times (particularly as the first pull is
likely to have no effect).  Also you can try this with --last 1000 to get a
more vigorous test.

> Maybe we can egg on the bytestring people and get them to submit
> patches taking this further down (for example, they could improve our
> between newlines and nth newline stuff).

That'd be nice.
-- 
David Roundy
Department of Physics
Oregon State University