xint

1

Whether or not JIT compiling is always used ( - Xcomp ), never used ( - Xint ), or only done on hotspots ( - Xmixed ; this is the default , and highest performance option ) .

使用JIT编译的方式：总是使用（-Xcomp）、从不使用（-Xint）或只对热点使用（-Xmixed；这是默认选项，产生的性能最好）。
2

Xint , which runs the JVM in interpreted mode ( which can be useful for testing whether the JIT compiler is actually having an effect on your code or verifying if you have a bug in the JIT compiler ) .

在解释模式下运行JVM（对于测试JIT编译器实际上是否对您的代码起作用或者验证是否JIT编译器中有一个bug，这都很有用）。