patch 8.2.2654: Vim9: getting a character from a string can be slow Commit: https://github.com/vim/vim/commit/ff871400461183010d3ab98f3f326e4bb75e221b Author: Bram Moolenaar <Bram@vim.org> Date: Fri Mar 26 13:34:05 2021 +0100 patch 8.2.2654: Vim9: getting a character from a string can be slow Problem: Vim9: getting a character from a string can be slow. Solution: Avoid a function call to get the character byte size. (https://github.com/vim/vim/issues/8000)

TYPEMAP
VIWIN	T_VIOBJNOMUNGE
VIBUF	T_VIOBJNOMUNGE

INPUT
T_VIOBJNOMUNGE
	if (sv_isa($arg, \"${ntype}\")) {
	    IV tmp = SvIV((SV*)SvRV($arg));
	    $var = INT2PTR($type, tmp);
	    if (!tmp)
		croak(\"$ntype no longer exists\");
	}
	else
	    croak(\"$var is not of type ${ntype}\")