[pypy-dev] A simple file reading is 2x slow wrt CPython

[Ondřej Bílka]

On Mon, Jun 29, 2015 at 04:58:40PM +0200, Maciej Fijalkowski wrote:
> On Mon, Jun 29, 2015 at 4:56 PM, Ondřej Bílka <neleai at seznam.cz> wrote:
> > On Mon, Jun 29, 2015 at 04:44:44PM +0200, Maciej Fijalkowski wrote:
> >> On Mon, Jun 29, 2015 at 4:43 PM, Ondřej Bílka <neleai at seznam.cz> wrote:
> >> > On Mon, Jun 29, 2015 at 03:58:12PM +0200, Maciej Fijalkowski wrote:
> >> >> it's sort-of-known, we have a branch to try to address this, the main
> >> >> problem is that we try to do buffering ourselves as opposed to just
> >> >> use libc buffering, which turns out to be not as good. Sorry about
> >> >> that :/
> >> >>
> >> > Do you have testcase to report? I could fix that.
> >>
> >> testcase of what? PyPy buffering not being up to scratch compared to
> >> libc buffering?
> >
> > Why libc buffering is bad so it could be fixed.
> 
> no, libc buffering is good and we should use it as opposed to our
> home-grown solution which is bad and likely should be thrown away ;-)

Ok, I wrongly parsed your sentence to mean that we do buffering
ourself because libc one is bad.