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Date: Wed, 02 Mar 2016 09:32:59 +0000
From: Peter Stephenson <p.stephenson@samsung.com>
To: Zsh Users <zsh-users@zsh.org>
Subject: Re: Extended globbing seems to have become much slower in recent
 versions of Zsh
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On Tue, 01 Mar 2016 16:03:56 -0800
Bart Schaefer <schaefer@brasslantern.com> wrote:
> On Mar 1,  8:11pm, Jesper Nygards wrote:
> }
> } New runs with your suggestion:
> 
> Well, that's interesting.  Seems to indicate that building argv to pass
> to builtins is even more expensive than an array assignment.
> 
> Still, I can't find anything on my system that causes as dramatic a
> difference as yours from 5.0.5 -> 5.2+.  The (-.D) qualifiers seem to
> have the largest effect for me, for you its the exclusion pattern.
>...
> I did find a small but observable speedup when compiling without
> MULTIBYTE_SUPPORT, too; there were a lot of multibyte repairs to
> pattern.c after 5.0.5.

There was a fairly recent optimsiation to handle patterns by metafying
earlier in the case of parameter substitutions.  Globbing shouldn't have
been substantially affected although the order of operations is a bit
different.  I don't see how this could be relevant, though.

pws