Re: strrep vs. regexprep

[Rik]

On 10/23/2011 02:21 PM, address@hidden wrote:
> Q2: 
> There's ample room for improvement in various parts I wrote. But I need to
> know:
> which one is faster,  strrep  or  regexprep ?
> Both of these are needed in several places, but AFAICS regexprep is more
> versatile.
Philip,

strrep is much faster, approximately 20X faster, than regexprep.  At some
point it would be nice to investigate why using the PCRE library is so much
slower.  For now, however, try to keep everything using Octave's own
internal string functions such as strrep, strtok, strfind, strsplit, etc. 
I have updated nearly every function except strtok in the scripts/strings
directory over the last month.  They have all been tweaked for better
performance.  Also, in general things are faster when operating on 2-D
character arrays rather than cell array of strings.  One doesn't always
have a choice though.

--Rik