Kiyokuni Kawachiya Kazunori Ogata Tamiya Onodera Analysis and reduction of memory inefficiencies in Java strings. 385-402 2008 OOPSLA http://doi.acm.org/10.1145/1449764.1449795 conf/oopsla/2008 db/conf/oopsla/oopsla2008.html#KawachiyaOO08