JIT vs Interpreters

Question

I couldn\'t find the difference between JIT and Interpreters.

Jit is intermediary to Interpreters and Compilers. During runtime, it converts byte code to machine code (

Answer 1

The first time a class is referenced in JVM the JIT Execution Engine re-compiles the .class files (primary Binaries) generated by Java Compiler containing JVM Instruction Set to Binaries containing HOST system’s Instruction Set. JIT stores and reuses those recompiled binaries from Memory going forward, there by reducing interpretation time and benefits from Native code execution.

And there is another flavor which does Adaptive Optimization by identifying most reused part of the app and applying JIT only over it, there by optimizing over memory usage.

On the other hand a plain old java interpreter interprets one JVM instruction from class file at a time and calls a procedure against it.

Find a detail comparison here