I'm glad an authoritative source has stated this. It's been ongoing BS for years. I first got into ARM machines with the Acorn Archimedes and even back then, people were spouting some kind of intrinsic efficiency benefit to ARM that just didn't make any sense.

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astrange 3 days ago | parent [-]

It is true for small cores, it's just not important for big cores compared to all the other things you have to solve.

	▲	MBCook 3 days ago \| parent [-]
		Makes sense. A 386 had 275,000 transistors. You can see how instruction decode stuff for a more complex x86 instruction could be a reasonable fraction of that. ArrowLake is 17.8 billion. Even if you divide by the core count instruction decode obviously isn’t much of that.