Re: efficiency of map::operator and map-insert
<email@example.com> skrev i meddelandet
item 24 of Scott Meyers (excellent) effective STL book is about the
performance difference of operator compared to map insert. In
he warns about the possible performance loss of operator due to an
Our code uses a lot of this constructs and therefore I profiled his
efficient update algorithm with a std::map<int, std::sting>.
I come to the following profile results (Visual Studio 2003 release
Thus my guess will be that indeed only a very heavy object with
dominating adds in a container will make a difference.
I belive the reason is that the C++ committee has decided to change
the specification of operator
and this change is already implemented in the VS 2003 library.
[ See http://www.gotw.ca/resources/clcm.htm for info about ]
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