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dynamic recompilation
In computer science, dynamic recompilation (sometimes abbreviated to dynarec or the pseudo-acronym DRC) is a feature of some emulators and virtual machines, where the system may recompile some part of a program ''during execution''. By compiling during execution, the system can tailor the generated code to reflect the program's run-time environment, and potentially produce more efficient code by exploiting information that is not available to a traditional static compiler.
==Uses==
Most dynamic recompilers are used to convert machine code between architectures at runtime. This is a task often needed in the emulation of legacy gaming platforms. In other cases, a system may employ dynamic recompilation as part of an adaptive optimization strategy to execute a portable program representation such as Java or .NET Common Language Runtime bytecodes. Full-speed debuggers also utilize dynamic recompilation to reduce the space overhead incurred in most deoptimization techniques, and other features such as dynamic thread migration.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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