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From: Philipp Stephani
Newsgroups: gmane.emacs.devel
Subject: Re: Some dynamic module questions
Date: Fri, 27 Nov 2020 12:50:34 +0100
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Cc: Emacs developers
To: Helmut Eller
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Am Fr., 27. Nov. 2020 um 11:47 Uhr schrieb Helmut Eller
:
>
> 1. Is there some way to pass unibyte-strings to module functions?
Emacs 28 will have a make_unibyte_string function. Before that, you
have to resort to calling the unibyte-string function directly.
>
> 2. Why does initialize_environment copy all the function pointers all
> the time? Would it be more efficient to use the same function table
> for all environments.
The environment structure holds some per-call state (the signal data),
so we need to create a new one for each call. We could in theory
optimize this by preinitializing an environment structure with the
function pointers (saving a few IP-relative memory accesses); I'm not
sure whether that's significantly faster though.