In what ways do C++ exceptions slow down code when there are no exceptions thown?

Question

I have read that there is some overhead to using C++ exceptions for exception handling as opposed to, say, checking return values. I\'m only talking about overhead that is i

Answer 1

Only overhead is ~6 instructions which add 2 SEH at the start of the function and leave them at the end. No matter how many try/catches you have in a thread it is always the same.

Also what is this about local variables? I hear people always complaining about them when using try/catch. I don't get it, because the deconstructors would eventually be called anyways. Also you shouldn't be letting an exception go up more then 1-3 calls.