The program can be entirely converted into machine code and saved before it is run, using a compiler.通过计算机编译，程序在运行前可完全转化为机器码并保存起来。The result, in some cases, was that the compiled version was never used.结果就是，在某些情况下，可能永远不会用到编译的版本。But the performance benefit of compiled code is still important in this environment.但是这种环境中，编译的代码的性能优势仍然非常重要。