March 29th, 2012, 10:01 AM
Passing std:: or boost::shared_ptr as a reference to a function
I was playing with PVS-Studio static analysis tool recently, and it suggested me to replace passing of const std::shared_ptr<type> arg to const std::shared_ptr<type>& arg.
I perfectly understand that it is a good way to optimize performance as when I pass shared_ptrs by value there are increments / decrements of reference counters which are interlocked operations.
So the question is - is there any reason I should not do such optimization? Is there any corner case I did not consider?
I'm now trying to see it is makes sense to optimize this way one heavily-used interface, so would appreciate comments.
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