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Patent Title: Method and apparatus for partial just in time compiling in a data processing system

Assignee: IBM
Patent Number: US6295642
Issue Date: 09-25-2001
Application Number:
File Date:04-29-1999


Abstract: A method and apparatus for just in time compilation of Java bytecode methods and provides a means to compile only the paths that are actually executed. An iterative process is employed whereby bytecodes are compiled up to the next conditional flow bytecode or return, the compiled code is executed and any attempt to enter uncompiled paths of the method is monitored. When the executing thread attempts to execute an uncompiled path control is returned to the compiler and the process is repeated starting with the first bytecode of that path. The process continues until all paths have been compiled or until it is deemed likely that all the most commonly executed paths have been compiled. At that point final optimizations and housekeeping are performed.

Notes:

Link to USPTO

IBM Pledge dated 1/11/2005