How does optimizing the performance of a C # 3.0 hard drive against rectangular arrays work?

Question

In Apress's book, Illustrated C # 2008, p. 343 notes:

"One-dimensional arrays have special instructions in CIL that allow them to optimize performance. Rectangular arrays do not have these instructions ... Because of this, using jagged arrays can sometimes be more efficient ..."

Does anyone know how these performance optimizations are implemented?

Answer 1

Read this article .
Note that this is written about CLR version 1.0; I do not know how much has changed since then.