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Discussion on: Writing Rust the Elixir way

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Milan Raj

Each Lunatic process gets their own heap, stack and syscalls.

It looks like the the erlang baseline per process memory usage (stack + heap) is pretty low. Do you know what the Lunatic process size is / what is the future goal?

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Bernard Kolobara Author

Lunatic's process size is a bit higher than Erlang's when a process is spawned. It's around 4KiB for the stack, if you don't use any heap data. On modern 64bit CPUs Lunatic will relay mostly on cheap virtual memory. The actual memory consumption during runtime should be lower than Erlang's in most cases just from the fact that Rust's data structures are more compact and memory efficient. This is something that can be optimised further if it ever becomes a bottleneck. Right now the development is focused on stability and correctness before performance.

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Josh • Edited

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