Frederik Vandeputte Lieven Eeckhout Phase Complexity Surfaces: Characterizing Time-Varying Program Behavior. 320-334 2008 conf/hipeac/2008 HiPEAC http://dx.doi.org/10.1007/978-3-540-77560-7_22 db/conf/hipeac/hipeac2008.html#VandeputteE08