The Just-In-Time (JIT) compiler is a component of the runtime environment that improves the performance of Java™ applications by compiling bytecodes to native machine code at run time. ... The JIT compiler helps improve the performance of Java programs by compiling bytecodes into native machine code at run time.

What is the purpose of JIT compiler?

The JIT compiler aids in improving the performance of Java programs by compiling bytecode into native machine code at run time. The JIT compiler is enabled throughout, while it gets activated, when a method is invoked. For a compiled method, the JVM directly calls the compiled code, instead of interpreting it.

What is the advantage of JIT just in time compiler?

Advantages: JIT compilers require less memory. After a program has started, JIT compilers run. While the code is running, it is possible to optimize it.