What is JIT compiler?

JIT stands for Just-In-Time compiler.
JIT compiler task is same as Java Interpreter but Java Interpreter process the byte code line by line whereas JIT
compiler process the byte code complete by once.

Note:  Before to Java2 version, Java Interpreter was used but because of processing the byte code line by line, speed program execution is very slow.
To improve the speed,Java has replaced the Java Interpreter with JIT Compiler from Java2 onward.


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