mainline: improved performance tracking
mainline: improved performance tracking

kerryjiang/SuperSocket,fryderykhuang/SuperSocket,memleaks/SuperSocket,chucklu/SuperSocket,ZixiangBoy/SuperSocket,chucklu/SuperSocket,mdavid/SuperSocket,mdavid/SuperSocket,jmptrader/SuperSocket,ZixiangBoy/SuperSocket,jmptrader/SuperSocket,mdavid/SuperSocket,jmptrader/SuperSocket,fryderykhuang/SuperSocket,fryderykhuang/SuperSocket,kerryjiang/SuperSocket,ZixiangBoy/SuperSocket,chucklu/SuperSocket