Buffer

Limitation

NodeJS buffermodule has a constant - that can change due to the environment, OS, etc - as to how much memory a Buffer.alloc can allocate. It's a good practice to check for this whenever using Buffer class.

Real Use Case

Fetching big objects from Redis - NodeJS redis Library uses the Buffer class when reading the socket responses. If we decide to retrieve a big object from Redis, lets say > 2GB (read below), we can easily kill the NodeJS process.

Buffer.alloc - Limitations

When working with NodeJS buffer allocation - there's a constant buffers.constants.MAX_LENGTH which tells you, in bytes, what is the maximum alloc you can have.