What is the full form of JIT
What is the full form of JIT
JIT: Just-in-time
JIT stands for Just-in-time. A just-in-time (JIT) compiler is a program that turns bytecode into instructions that can be sent directly to a computer’s processor (CPU).
Typically, compilers are key in deciding the speed of an application for developers and end users. Just-in-time compilers can be used for performance optimization to improve application runtime.
What do just-in-time compilers do in Java?
In the past, most programs written in any language have had to be recompiled, and sometimes rewritten, for each computer platform. One of the biggest advantages of Java is that programs only have to be written and compiled once.
The Java on any platform will interpret the compiled bytecode into instructions understandable by the particular processor. However, the virtual machine handles one bytecode instruction at a time. Using the Java just-in-time compiler — really a second compiler — at the particular system platform compiles the bytecode into the particular system code.
This is as though the program had been compiled initially on that platform. Once the code has been recompiled by the JIT compiler, it will usually run more quickly in a computer.