For some reason gprof nerver terminates on my system. So here is the same data recorded with oprofile's operf. It also includes kernel, libc and ld figures. http://codepad.org/zL3C6eQd whole phobos as shared library with unittests and BUILD=debug http://codepad.org/lITSMbhD BUILD=release didn't compile with some error about .offsetof