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Date: Tue, 8 Nov 2011 16:35:07 +0100
From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: Bart Schaefer <schaefer@brasslantern.com>
Cc: zsh-users@zsh.org
Subject: Re: zsh spinning for ages when I hit tab on directory
Message-ID: <20111108153507.GD1621@x4.trippels.de>
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In-Reply-To: <111108071341.ZM3017__46451.674323953$1320765436$gmane$org@torch.brasslantern.com>

On 2011.11.08 at 07:13 -0800, Bart Schaefer wrote:
> On Nov 8,  3:21pm, Markus Trippelsdorf wrote:
> } Subject: Re: zsh spinning for ages when I hit tab on directory
> }
> } > > When position the cursor after the man1/ of 
> } > > ~ % /usr/share/gcc-data/x86_64-pc-linux-gnu/4.7.0/man/man1/
> } > > and hit tab, zsh starts spinning:
> } 
> } zstyle ':completion:::::' completer _complete _approximate
> } zstyle -e ':completion:*:approximate:*' max-errors 'reply=( $(( ($#PREFIX+$#SUFFIX)/3 )) )'
> } zstyle ':completion:*:corrections' format '%B%d (errors: %e)%b'
> } 
> } When I comment out the max-errors zstyle, zsh no longer hangs.
> } 
> } So the next question is, how can I get the same behavior as before, but
> } without the long hangs?
> 
> You're computing max-errors based on the length of the entire path, but
> the effect of correction is applied to each individual component, so
> you're allowing 18 corrections per filename in man1/ with the above.
> 
> Try changing to something like
> 
> zstyle -e ':completion:*:approximate:*' \
> 	max-errors 'reply=( $(( ($#PREFIX:t+$#SUFFIX:h)/3 )) )'
> 
> although that (and your original) allows no corrections unless there
> are at least 6 characters already in the current word, so you might
> want to use e.g. ($#PREFIX:t+2) or ($#PREFIX:t < 3 ? 3 : $#PREFIX:t).

Thanks Bart. This fixes the problem. 
BTW I copied the lines from the "From bash to Z Shell" book.

-- 
Markus