The hard issues of parallelism and the optimizations needed to produce effective code just don't fit into the time available for a single course in compiler construction.

并行性的难题和生成有效代码所需的优化不适合在单个的编译器构造的课程中讲。

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Psyco — to keep it very short — is a just-in-time (JIT) compiler of Python code into (x86) machine code.

Psyco可以保持代码非常简短；它是(x86)机器代码中的一个JIT Python代码编译器。

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Native code is compiled (and can be recompiled) by a Just-in-time (JIT) compiler while the application runs, based on which classes and methods are invoked frequently.

本机代码在应用程序运行时由即时(JIT)编译器编译(而且可以重新编译)，基于经常调用的类和方法。

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Performance-wise, the winner is a pre-release version of Tower Technology's TowerJ compiler, which generates a native executable from pure Java code that runs almost 25 percent faster than the fastest Java interpreter, even when the interpreter has a just-in-time compiler.

CNN: New benchmark results show Java ready for prime time on servers