Buffer.BlockCopy vs unsafe byte* pointer copy

Question

which one has better performance when copy a block of byte?

What does a profiler output when you test it? – dtb Mar 01 '10 at 05:28 — dtb, Mar 01 '10 at 05:28

score 10 · Accepted Answer · answered Mar 01 '10 at 05:30

10

Buffer.BlockCopy is pretty optimised - it is basically a wrapper over a raw mem-copy; so it should be pretty fast (and avoids messing with pointers and unsafe code). It should be the default. You could of course measure it each way...

answered Mar 01 '10 at 05:30

Marc Gravell

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It's more of a mem-move, in terms of its contract, as it also handles overlapping arrays. – kornman00 Apr 20 '13 at 00:14

score 4 · Answer 2 · answered May 04 '10 at 20:31

4

Handling of Large Byte Arrays at http://www.codeproject.com/KB/dotnet/Large_Byte_Array_handling.aspx documents performance versus various methods, include the methods in your question.

answered May 04 '10 at 20:31

AMissico

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Buffer.BlockCopy vs unsafe byte* pointer copy

2 Answers2

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