[Freeswitch-users] best freeswitch timer

Hello, Could someone knowing the different FS timers clarify the difference between those: - default core softtimer - core heavy timer (does this option still exists?) - posix timer - timerfd Can any of those provide a significant performance improvement, or is it just not worth switching from the default? In any case, which one would be the recommended/best one under Linux with a relatively recent kernel (>3.0)? Thanks, François.