Span.SequenceEquals is faster than memcmp

xnorswap · 2025-03-30T14:53:33 1743346413

A more meaningful adventure into microbenchmarking than my last. I look at why we no longer need to P/Invoke memcmp to efficiently compare arrays in C# / .NET.

Old stackoverflow answers are a dangerous form of bit-rot. They get picked up by well-meaning developers and LLMs alike and recreated years after they are out of date.

neonsunset · 2025-03-30T15:44:53 1743349493

For loop regression in .NET 9, please submit an issue at dotnet/runtime. It’s yet another loop tearing miscompilation caused by suboptimal loop lowering changes if my guess is correct.

(评论) (comments)

(评论)
(comments)