[ksh93-integration-discuss] [osol-code] extremly badperformance of Solaris regex

[Glenn Fowler]

On Thu, 01 Nov 2007 02:56:42 +0100 Roland Mainz wrote:
> Jens Elkner wrote:
> [Please keep ksh93-integration-discuss at opensolaris.org in the CC: field
> for AST-related topics since not all people there are subscribed to all
> other opensolaris-org lists, too]
> > On Wed, Oct 31, 2007 at 01:04:55PM -0400, Glenn Fowler wrote:
> > > > Jens Elkner wrote:
> > > > >                  regex.c                          RegexTest.java    MHz
> > > > > Solaris sparc    13.12u  0.01s  0:13.17  99.6%    5569 ms           1503
> > > > > Solaris x86       6.28u  0.00s  0:06.29  99.8%    2571 ms           2813
> > > > > Linux i686        0.704u 0.004s 0:00.70 100.0%    5587 ms           2079.593
> > >
> > > I found RegexTest.java but it takes as input a file of patterns/string "regex.txt"
> > 
> > Ahh - good.
> > 
> > > and it looks like that file is user-specified
> > 
> > Yes - the RE is hardcoded and as file (first arg to each prog) one may
> > choose any file [which yields the worst case aka no match]. For the
> > numbers above I've choosen an email of my SUN contact, which contains
> > matching grant infos wrt. FUL aka EDU - so I guess not really public stuff.
> > 
> > elkner.q ~/tmp > wc xt
> >     6617    6883  427011 xt
> > 
> > Anyway, produced the numbers again for those, which wanna fetch
> > http://iws.cs.uni-magdeburg.de/~elkner/regex/mk.log

ok, I snarfed the subject file
what is the RE?
thanks

-- Glenn Fowler -- AT&T Research, Florham Park NJ --