How is Array.Copy implemented in C#?

Question

I tried to look at the implementation of Array.Copy in C# with ILSpy but it didn\'t show me the implementation itself.

I wrote a simple benchmark, Array

Answer 1

Same techniques used to write a fast memcpy function:

• loop unrolling
• transfer of aligned data in large chunks (often using SIMD)
• CPU caching hints (SIMD helps here as well)

See also:

• Very fast memcpy for image processing?
• How to increase performance of memcpy
• does rewriting memcpy/memcmp/... with SIMD instructions make sense