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Re: byte-opt.el addition - optimize list of compile-time constants


From: Zack Weinberg
Subject: Re: byte-opt.el addition - optimize list of compile-time constants
Date: Wed, 08 Dec 2004 11:45:12 -0800
User-agent: Gnus/5.110003 (No Gnus v0.3) Emacs/21.3 (gnu/linux)

Stefan Monnier <address@hidden> writes:

>> I seriously wonder how much would break if this optimization were
>> implemented for 'list'.  My suspicion is that people don't commonly
>> apply 'eq' to lists in the first place.
>
> Well, try it:
>
>   (put 'list 'byte-optimizer 'byte-optimize-pure-func)
>   (put 'list* 'byte-optimizer 'byte-optimize-pure-func)
>   (put 'cons 'byte-optimizer 'byte-optimize-pure-func)
>   (put 'append 'byte-optimizer 'byte-optimize-pure-func)

  !! Symbol's function definition is void ((byte-optimize-pure-func))

I guess this is only in CVS Emacs?

zw




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