Andrew Holden skrev:
Erik wrote:
Unfortunately it does not look so good for BOOST_FOREACH after this modification. It will increase to 24 instructions, while the handcoded is still only 21. I created a script (attached) to test the examples systematically with different compiler versions and optimization levels.
Forgive me if this was answered in an earlier post, The answer is available by executing the test script in my previous post and then running the diff command that I showed in that post: diff -dU2 iterate_vector-member-g++-4.2.0-O3.s BOOST_FOREACH-member-g++-4.2.0-O3.s|kompare -
but how complex is the loop body, including the complexity of any functions it calls? The size of the loop body increases from 6 to 7 instructions and the code before the loop increases with 2 instructions.