---
title: "What is JIT compiler?"  
description: "What is JIT compiler?"  
author: "Takeshi Okada"  
published: 2015-03-16  
updated: 2020-09-21  
canonical: https://www.mindstick.com/interview/2350/what-is-jit-compiler  
category: "java"  
tags: ["java", "javac"]  
reading_time: 1 minute  

---

# What is JIT compiler?

**Just-In-Time(JIT) compiler:**It is used to improve the performance. JIT compiles parts of the byte code that have similar functionality at the same time, and hence reduces the amount of time needed for compilation.Here the term “compiler” refers to a translator from the instruction set of a Java virtual machine (JVM) to the instruction set of a specific CPU.

## Answers

### Answer by Anonymous User

**Just-In-Time(JIT) compiler:**It is used to improve the performance. JIT compiles parts of the byte code that have similar functionality at the same time, and hence reduces the amount of time needed for compilation.Here the term “compiler” refers to a translator from the instruction set of a Java virtual machine (JVM) to the instruction set of a specific CPU.


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