What is the performance difference between blocks and callbacks?

Posted by Don on Stack Overflow See other posts from Stack Overflow or by Don
Published on 2010-04-21T04:19:38Z Indexed on 2010/04/21 4:23 UTC
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blocks

One of the things that block objects, introduced in Snow Leopard, are good for is situations that would previously have been handled with callbacks. The syntax is much cleaner for passing context around. However, I haven't seen any information on the performance implications of using blocks in this manner. What, if any, performance pitfalls should I look out for when using blocks, particularly as a replacement for a C-style callback?

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