Var/Class init performance question

What language?

In C++ the two generate identical code.

Assuming C++, they are the exact same, both will call the one constructor that accepts a C-style string or some other type which accepts a C-style string.

Yes I meant C++, sorry about the lack of info.

Nice that they generate identical code. What about this?

3.)
String myStr;
myStr = "Foo";

Obviously this is a poor choice anyway because it could be done on one line, and it leaves 'myStr' uninitialized when it is created, which is bad.

That will default construct myStr and then call the assignment operator. This will generally be slower than direct initialization.