How to check memory usage of canister from Rust

Is there an API in Rust to check the memory usage of a canister? This would be very useful for automatic scaling, to allow a canister to know when it needs to spin up another canister.

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I’m interested in this too.

Since you’re using rust, I believe, you can also estimate it by hand std::mem::size_of - Rust

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You can use this core::arch::wasm32::memory_size - Rust

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