#23: Garbage collection

Creating new objects, arrays or strings is so straightforward that we often forget what happens underneath. And I don’t mean trying to figure out what this refers to in JavaScript objects. I mean: memory management. On each request we create a ton of objects. A server can easily allocate hundreds of megabytes of memory. Per second. Memory is cheap and there’s a lot of it. But it’s not infinite. How come we can simply call new Object() over and over again, taking more and more memory from our computer? Many objects are no longer needed a few milliseconds after they’re created. What happens to the memory they occupy? We take for granted what was thought to be almost impossible: automatic memory management.

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