[amomchilov]

Recent macOS versions zero out memory on free, which improves the efficacy of memory compression. Apparently it’s a net performance gain in the average case

[LoganDark]

I wonder if Apple Silicon has hardware acceleration for memory zeroing... Knowing Apple, I wouldn't be surprised.

[chuckadams]

ARM in general does, or at least some modern variants. Various docs for Android and LLVM suggest it's part of the Memory Tagging Extension.