ARM had THUMB, which definitely improved performance back in the GameBoy days — ... | Hacker News

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NobodyNada on Oct 17, 2021 | parent | context | favorite | on: Ask HN: What does one look for in a laptop these d...

ARM had THUMB, which definitely improved performance back in the GameBoy days — but they dropped that with AArch64, so presumably they decided it wasn’t beneficial anymore.

klelatti on Oct 17, 2021 [–]

Indeed and IIRC the increased code density got them into Nokia phones too.

I find it hard to believe that they didn't drop Thumb from AArch64 without a lot of analysis of the impact on performance.

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