Why is the ImmutableList <T> enumerator much slower compared to List <T>

Question

I have a piece of code that is often repeated in a small list. Given that the list never changes at runtime, I replaced the implementation ImmutableList<T>. If you look at the dotTrace performance trace, this is much worse than normal List<T>:

( List<T>left, ImmutableList<T>right)

Why is this happening and is there a workaround?

Answer 1

List<T>, , , ImmutableList<T> . Channel9, ).

, , ?

ImmutableArray<T>.

. NET Framework

:

• (< 16)
• , .

:

• .
• , .