Remember, OS X is FreeBSD somehow layered on top of Mach 3. In particular, it calls though to Mach for virtual memory. And Mach is at its heart an academic design aiming for flexibility in its VM system rather tha performance. In particular, its provisions for user-space pagers. I can easily believe that its mmap is 10x slower that Linux. 60x is.. a bit extreme. A Darwin kernel hacker should probably get a nudge about it. - To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html