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Re: PATCH: more sorting: multibyte case-insensitivity
- X-seq: zsh-workers 23121
- From: Peter Stephenson <pws@xxxxxxx>
- To: zsh-workers@xxxxxxxxxx
- Subject: Re: PATCH: more sorting: multibyte case-insensitivity
- Date: Mon, 22 Jan 2007 16:06:31 +0000
- In-reply-to: <070122075835.ZM10252@xxxxxxxxxxxxxxxxxxxxxx>
- Mailing-list: contact zsh-workers-help@xxxxxxxxxx; run by ezmlm
- References: <200701221423.l0MENUlQ020518@xxxxxxxxxxxxxx> <070122075835.ZM10252@xxxxxxxxxxxxxxxxxxxxxx>
Bart Schaefer wrote:
> On Jan 22, 2:23pm, Peter Stephenson wrote:
> }
> } This extends the new sort code to handle lowering of case properly with
> } multibyte characters.
>
> I'm beginning to worry that we're piling up some pretty severe performance
> penalties with this stuff. Zsh was already about 1/3 the speed of bash on
> some benchmarks, as I recall. Has anyone lately compared a recent CVS
> build to something a bit older?
"unsetopt MULTIBYTE" is supposed to get you pretty much back to where we
were before if you don't care about multibyte characters. I'm not aware
of a general solution to the efficiency problem with proper multibyte
handling.
In this particular case, it should be more efficient than before, at
least with a long list to sort, since now the strings are transformed
once each instead of every time two strings are compared.
I haven't done any benchmarking. At the moment I'm happy if it works.
--
Peter Stephenson <pws@xxxxxxx> Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK Tel: +44 (0)1223 692070
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