http://www.peertopatent.org/patent/42/prior_art/list One embodiment of the present invention provides a system that selectively executes different versions of executable code for the same source code. During operation, the system first receives an executable code module which includes two or more versions of executable code for the same source code, wherein the two or more versions of the executable code are optimized in different ways. Next, the system executes the executable code module by first evaluating a test condition, and subsequently executing a specific version of the executable code based on the outcome of the evaluation, so that the execution is optimized for the test condition. en-us Method and apparatus for selectively executing different executable code versions which are optimized in different ways Title: Proceedings of the ACM SIGPLAN Conference on Programming Language Design and Implementation (PLDI'97<br/>ISBN: <br/>Description: Conference article discussing relevant prior art; cited by the paper in [[prior art 90]]. Here a program dynamically chooses among multiple statically compiled/optimized code variants based upon an execution time measure. Mon, 03 Dec 2007 23:46:36 -0800 http://www.peertopatent.org/prior_art/97/detail Method and apparatus for selectively executing different executable code versions which are optimized in different ways Patent/Application #: 5944819<br/>Description: A patent on optimized software execution based on hardware attributes queried at runtime. Mon, 22 Oct 2007 14:25:03 -0700 http://www.peertopatent.org/prior_art/91/detail Method and apparatus for selectively executing different executable code versions which are optimized in different ways Title: Proceedings of the ACM SIGPLAN workshop on Dynamic and adaptive compilation and optimization<br/>ISBN: 1-58113-241-7<br/>Description: A generic framework for remote dynamic program optimization. Sat, 20 Oct 2007 13:36:51 -0700 http://www.peertopatent.org/prior_art/90/detail