Announcing `compact_str`! A super memory efficient immutable string that is transparently stored on the stack, when possible

• compact_str

  16 541 7.6 Rust

  A memory efficient string type that can store up to 24* bytes on the stack

Hey everyone! I just published a new crate called compact_str which provides a new immutable string type, CompactStr, that allocates up to 24 bytes on the stack (12 bytes for 32-bit architectures). This can be particularly useful when working with a lot of small strings, e.g. parsing data, and is more performant than a normal String.

• smol_str

  3 377 6.5 Rust
  

Comparatively: * SmolStr can inline up to 22 bytes but does not adjust down for 32-bit architectures, meaning it's potentially wasting memory on 32-bit archs. Similarly though it's immutable and Clone is O(1) * SmartString can inline up to 23 bytes, but it's mutable and Clone is O(n). Also this crate makes assumptions about the memory layout of a String, which in theory should be fine, but is a slight caveat.

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• smartstring

  7 482 0.0 Rust

  Compact inlined strings for Rust.

Comparatively: * SmolStr can inline up to 22 bytes but does not adjust down for 32-bit architectures, meaning it's potentially wasting memory on 32-bit archs. Similarly though it's immutable and Clone is O(1) * SmartString can inline up to 23 bytes, but it's mutable and Clone is O(n). Also this crate makes assumptions about the memory layout of a String, which in theory should be fine, but is a slight caveat.

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