"It takes care of itself
-------------------------------
When writing a throwaway script that I will only use a handful of
times, optimising that code isn’t necessarily high on my priority
list. The priority is to get it written, and get it running.
That’s where the V8 (C++) engine that NodeJS is compiled into
throws you a bone.
When you have no choice but to call arrays into memory and
manipulate them, sometimes very very large arrays, you can begin
to worry about the state of your machine and the amount of memory
that is being used. Luckily, V8 handles automatic garbage
collection.
What this means is that whenever I have disregarded a block of
information, say removed an index from an array, then that memory
is automatically cleared and freed back up on the next sweep.
While the process of collection and actually checking can be a
bit intensive, it means when I am quickly iterating through code
I don’t need to pay a tremendous amount of attention to my memory
management, and I can entrust V8 to handle all the little
nuances."
Don't be a computer. Do more with GC.
https://medium.com/@kieranmaher13/why-i-use-nodejs-for-basically-everything-i-do-e0a627787ecc
