The influence on memory when assigning a fresh value to a global variable

Is it safe to reassign global variables with new values without causing memory leaks?

Consider the following scenario:

gUI = {};

function myFunc1() {
   gUI.selectedItem = new BigArray(1000);
}
function myFunc2() {
   gUI.selectedItem = new BigArray(1000);
}
function release() {
   gUI.selectedItem = null;
}

Would calling myFunc1() and myFunc2() consecutively lead to memory leaks, or is it advisable to set the variable to null before reassigning it?

The concern here is primarily focused on memory usage and the possibility of old memory leaking when a new value is assigned using new.

Answer №1

In Javascript, a garbage collector is employed to recover memory from objects that are no longer accessible via variables. This allows the old memory to be automatically released.

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