RE: [HEADS-UP] BSD sort is the default sort in -CURRENT

> -----Original Message-----
> From: Doug Barton [mailto:dougb@FreeBSD.org]
> Sent: Tuesday, June 26, 2012 11:18 PM
> To: Gabor Kovesdan
> Cc: FreeBSD Current; Oleg Moskalenko
> Subject: Re: [HEADS-UP] BSD sort is the default sort in -CURRENT
>=20
> On 06/26/2012 11:04 PM, Gabor Kovesdan wrote:
> > Hi Folks,
> >
> > as I announced before, the default sort in -CURRENT has been changed
> > to BSD sort.
>=20
> Has this been performance tested vs. the old one? If so, where are the
> results?

Of course it was performance-tested. As this is a totally different program=
 with different=20
algorithms, it has totally different performance profile on different tests=
,
comparing to the old sort. In the default compilation mode (single thread s=
ort)=20
the performance is on the same level as the old sort (sometimes faster, som=
etimes slower).=20
The new sort is often significantly faster in numeric sort tests. In "exper=
imental" multi-threading=20
mode, the new sort is much faster than the old sort on multi-CPU systems.

The sort speed comparison is not actually fair because the old sort cuts so=
me corners and=20
has a number of bugs.

The concrete figures do not have much sense because you change the sort fil=
e and you get a totally=20
different performance ratio.=20

>=20
> > Since the import, the reported minor bugs have been
> > fixed and BSD sort has passed the portbuild test. If you encounter
> any
> > problems or incompatibility with the old GNU version, please report.
>=20
> Has this been thoroughly regression-tested against the old version,
> option by option?

Of course we have the regression tests. We have an overnight test that runs=
 through=20
probably 17 millions various sort option combinations.  But we actually had=
 to compare=20
the new sort against a fresh GNU sort implementation (version 8.15), becaus=
e the old BSD GNU sort=20
is very buggy and testing against the old GNU sort has no sense.

Oleg

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