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Re:Why Discord is switching from Go to Rust by senderista on Wednesday February 05, 2020 @12:58AM (#22244377)
I was a bit surprised that BTreeMap turned out to be more memory-efficient than HashMap; can anyone shed some light on this?

One of these days I’ll get around to turning my Rust set implementation[0] into a full-blown map (it’s already <50% the size of BTreeSet for ints)...

[0] https://github.com/senderista/rotated-array-set

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