http://blogs.msdn.com/b/fyuan/archive/2011/04/04/optimization-note-c-1-push-10h-pop-eax-call-chkstk.aspxI was looking at assembly code trying to improve an important performance scenario when I found a strange call to _chkstk 011E100E push 10h 011E1010 pop eax 011E1011 call _chkstk (011E1810h) 011E1016 mov ecx,esp My understanding is thaten-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)