Thumb isn't a factor. The Thumb encoding is only used for 32-bit ARM instruction...

		duskwuff on Nov 18, 2020 \| parent \| context \| favorite \| on: 16-inch MBP 2x slower than M1 MacBook Air in a rea... Thumb isn't a factor. The Thumb encoding is only used for 32-bit ARM instructions; 64-bit instructions use a fixed-width 32-bit encoding.