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@despair "@astrange_e That is a trolls sock puppet"
X Link @despair 2025-10-14T03:46Z 4449 followers, XX engagements

"I was curious whether compilers would convert a naive loop implementation of "set range of bits in u64 to 1" into O(1) bitwise ops. Answer: MSVC compiles the loop into a loop. Clang's output is bonkers: XXX bytes long branches everywhere 256-bit SIMD operations get involved"
X Link @despair 2025-10-23T05:00Z 4505 followers, 103.1K engagements

"@GrapheneWaffles It compiles sensible bitwise operations into the correct mov ; bzhi ; shlx sequence that's fine. What's bewildering me is why it decided to use 256-bit AVX2 opcodes for the looped version"
X Link @despair 2025-10-24T09:32Z 4505 followers, XXX engagements