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Re: ptrdiff_t misuse [was :Re: (empty)]

From: Stefan Monnier
Subject: Re: ptrdiff_t misuse [was :Re: (empty)]
Date: Sat, 30 Jun 2012 08:07:55 -0400
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.1.50 (gnu/linux)

>> if someone ever bumps into a problem
>> because of such an overflow, I'll be*super*  happy, because it means
>> that all the performance problems we get with long lines have
>> been fixed.
> No, if the overflow happens to generate a small integer,
> Emacs will run quickly and incorrectly
> without the patch in question.

But "fixing" the code like you have will just make it run "correctly"
and so super-extra slow that the user will just think it's frozen.
So, better keep the code clean since in any case it won't work,


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