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From: Stefan Monnier <monnier@iro.umontreal.ca>
Newsgroups: gmane.emacs.devel
Subject: Re: string_char_to_byte and string_byte_to_char micro-optimisation
Date: Fri, 14 Jun 2019 16:11:47 -0400
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> I don't think that will do for this case.  Strings are used rather
> rarely in Emacs.  We need to find a command that uses strings
> extensively, and uses non-ASCII text in strings in particular.

... and uses `aref` on it extensively.
Most strings are used via regexp-search in which case the conversion
between charpos and bytepos is generally lost in the noise.


        Stefan