Re: From wchar_t to char32_t

[Paul Eggert]

On 2023-07-10 07:58, Bruno Haible wrote:

>    - The rationale for defining and initializing the mbstate_t at the function
>      scope was that on BSD and macOS systems, an mbstate_t is 128 bytes large,

We can improve on that. I installed the attached two performance tweaks; 
the second tweak cuts that initialization from 128 down to at most 12 
bytes on those platforms. On x86-64 GNU/Linux these patches barely make 
a difference (one insn smaller). On the BSDs the patch is a bigger deal.

Even on the rare untweaked platform I expect (though I haven't measured) 
that mbcel's speed is competitive.

0001-diff-add-mbcel-checks-compiler-advice.patch
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0002-diff-tweak-mbstate_t-performance.patch
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