Currently, just in time compilation in JRuby is restricted to 2048 methods, ahead of time compiling can help to mitigate that restriction.

现在JRuby中有2048个方法采用即时编译，而提前编译能减轻这一限制。

youdao

A feature called just-in-time (JIT) compiling enables all managed code to run in the native machine language of the system on which it is executing.

一种称为实时(JIT)编译的功能使所有托管代码能够以它在其上执行的系统的本机语言运行。

youdao

At IBM he mastered a software trick called "just-in-time compiling, " which analyzes the flow of instructions surging toward a microchip and identifies all the repetitive or redundant steps that can be eliminated.

FORBES: Hardwired