Re: st: regexr string function very slow in Stata13

[Nicola Tommasi <nicola.tommasi@univr.it>]

Yes, I'm using the same flavor (Stata13.1  MP 64 bit 4 processor)

Nicola



Il 13/12/2013 12:15, William Buchanan ha scritto:
> Are you using the same flavor of Stata across the two versions?  I regularly need to use regular expressions to clean up strings and haven't noticed any differences between MP versions, but did notice speed differences between v 12MP2 and v 13SE.
>
> Sent from my iPhone
>
> > On Dec 13, 2013, at 4:28, Nick Cox <njcoxstata@gmail.com> wrote:
> >
> > Depends what the question is, really. But you're showing that Stata 13
> > is slower at the same job than Stata 12. That's, I guess, an undesired
> > side-effect of rewriting string functions to cope with long strings,
> > even if you don't have long strings.
> > Nick
> > njcoxstata@gmail.com
> >
> >
> > > On 13 December 2013 10:20, Nicola Tommasi <nicola.tommasi@univr.it> wrote:
> > > Hi all
> > > On my computer they are installed Stata12 and Stata13, but regexr function
> > > run very slowly in Stata13. Here a log file
> > > Any idea?
> > >
> > >
> > >
> > > . count;
> > > 730649
> > >
> > > . di "`c(stata_version)' - `c(os)' - `c(osdtl)' - `c(machine_type)' -
> > > `c(processors)'";
> > > 13.1 - Windows - 64-bit - PC (64-bit x86-64) - 4
> > >
> > > . timer on 1;
> > >
> > > . gen var2 = regexr(var1,"<[^<>]+>","");
> > >
> > > . timer off 1;
> > >
> > > . timer list 1;
> > >    1:     54.88 /        1 =      54.8830
> > >
> > > . timer on 2;
> > >
> > > . replace var2 = regexr(var2,"<[^<>]+>","");
> > > (730649 real changes made)
> > >
> > > . timer off 2;
> > >
> > > . timer list 2;
> > >    2:     54.14 /        1 =      54.1400
> > >
> > >
> > >
> > >
> > >
> > > . count;
> > > 730649
> > >
> > > . di "`c(stata_version)' - `c(os)' - `c(osdtl)' - `c(machine_type)' -
> > > `c(processors)'";
> > > 12.1 - Windows - 64-bit - PC (64-bit x86-64) - 4
> > >
> > > . timer on 1;
> > >
> > > . gen var2 = regexr(var1,"<[^<>]+>","");
> > >
> > > . timer off 1;
> > >
> > > . timer list 1;
> > >    1:      1.43 /        1 =       1.4300
> > >
> > > . timer on 2;
> > >
> > > . replace var2 = regexr(var2,"<[^<>]+>","");
> > > (730649 real changes made)
> > >
> > > . timer off 2;
> > >
> > > . timer list 2;
> > >    2:      0.49 /        1 =       0.4860
> > >
> > >
> > >
> > >
> > > --
> > > _______________________________________________________________________
> > > dott. Nicola Tommasi
> > > Centro Interdipartimentale di Documentazione Economica (C.I.D.E)
> > > University of Verona
> > > via dell'Artigliere, 19
> > > 37129 Verona (Italy)
> > > tel.: +39-045-8028048
> > > fax.: +39-045-8028047
> > > Skype: nicola.tommasi
> > > ________________________________________________________________________
> > >
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--
_______________________________________________________________________
dott. Nicola Tommasi
Centro Interdipartimentale di Documentazione Economica (C.I.D.E)
University of Verona
via dell'Artigliere, 19
37129 Verona (Italy)
tel.: +39-045-8028048
fax.: +39-045-8028047
Skype: nicola.tommasi
________________________________________________________________________

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