Java 9 High Performance

Java heap versus stack memory

I hope the preceding example and explanation gave you a good idea about how JVM uses heap and stack. So, let’s just summarize these two points and note down a few key differences as follows:

• Stack is faster than heap memory.
• Stack provides a storage for local variables, including primitive and object variables referencing to objects in the heap memory.
• Stack is LIFO, whereas heap is not.
• Stack memory is smaller than heap memory.
• Stack is specific to one thread of execution, whereas Heap memory is available to all parts of the program.
• As mentioned earlier, stack is specific to one thread of execution so only the current executing thread can access stack memory whereas heap memory is accessible globally.
• Stack ...