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The Node.js documentation on Buffer says:
Raw data is stored in instances of the
Bufferclass. ABufferis similar to an array of integers but corresponds to a raw memory allocation outside the V8 heap. ABuffercannot be resized.
Okay, so buffers are not stored in the V8 heap, but… where does Node.js actually store them? I can hardly imagine that it's on the stack, is it?
In other words: What exactly does
a raw memory allocation outside the V8 heap
actually mean?
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A buffer is a space in memory (typically RAM) that stores binary data. In Node. js, we can access these spaces of memory with the built-in Buffer class. Buffers store a sequence of integers, similar to an array in JavaScript.
MongoDB actually stores buffers in a special Binary class. A MongoDB binary is just a wrapper around a buffer with an additional sub_type property that is useful for UUIDs. For the purposes of this article though, you can ignore the sub_type property and just use the buffer property to get a Node. js buffer.
You put them in whatever folder you want. It is common practice to put each application in a different folder.
The buffers module provides a way of handling streams of binary data. The Buffer object is a global object in Node. js, and it is not necessary to import it using the require keyword.
out side of v8 heap area. read the below link will help you.
https://nodejs.org/api/smalloc.html#smalloc_smalloc
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