GC

One of Java's best achievements is GC. The GC process automatically manages memory and heap allocation that tracks down dead objects, removes them, and reallocates memory to a new object. Theoretically, as garbage collector automatically manages memory, it makes developers create new objects without thinking about the allocation and deallocation of memory to eliminate memory leaks and other problems related to memory.

How GC works

We usually think that GC collects and removes the unreferenced objects. Instead, GC in Java tracks live objects and marks all unreferenced objects as garbage.

The heap area of the memory is where objects are allocated dynamically. We should allocate heap memory to JVM before running the application. Allocating heap to JVM in advance has a couple of consequences:

• Improves object creation rate because JVM doesn't need to communicate with the OS to get memory for each new object. Once the JVM allocates memory to an object, JVM moves the pointer toward the next available...