"$$$" C++ Extension: Ruby Symbols and Lazy Enums

[jjp]

but it is a good indicator of the performances of the Library IMHO.

This boxing & unboxing stuff is just one of the things to look out for when programming something where performance is critical in Java or C#, it isn't always obvious where it can occur. It isn't really a shortcoming of the library or language implementation but a result of these language's design.

[_tommo_]

Uhm i don't think the boxing has much to do with that slowdown... the iterator was over an ArrayList of a class, so no boxing/unboxing should occur... in fact i was comparing those two:

Code: Select all

for( MyClass c : myArray ) 
     ....

//and
MyClass c;
for( int i = 0; i < myArray.size(); ++i) {
     c = myArray.get(i);
     ...
}

IMHO in this code the problem is the use of iterators in the first version... also i noticed that often putting MyClass c inside the loop causes a slowdown, and that is something that should not happen.

[betajaen]

Guys,

Please take it to the other C++ thread.

[jjp]

IMHO in this code the problem is the use of iterators in the first version... also i noticed that often putting MyClass c inside the loop causes a slowdown, and that is something that should not happen.

Ok, I thought you'd be referring to for-each over integral data types