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fuchsia / third_party / github.com / rust-lang / rust-analyzer / 02336c59bed57d292997c0b5a69e436785aa3be3
commit02336c59bed57d292997c0b5a69e436785aa3be3[log] [tgz]
authorLukas Wirth <me@lukaswirth.dev>Thu Oct 23 17:10:05 2025 +0200
committerLukas Wirth <me@lukaswirth.dev>Thu Oct 23 17:10:05 2025 +0200
tree9dc54e38a93c0e8624f76016b5853ccb914b9e82
parentbf2e3d7a7f8b094ce5bab9ef0a4cc5b8e6cde904 [diff]
Publish 0.3.4
2 files changed
tree: 9dc54e38a93c0e8624f76016b5853ccb914b9e82
  1. .github/
  2. benches/
  3. src/
  4. tests/
  5. .gitignore
  6. bors.toml
  7. Cargo.toml
  8. CHANGELOG.md
  9. LICENSE-APACHE
  10. LICENSE-MIT
  11. README.md
README.md

smol_str

CI Crates.io API reference

A SmolStr is a string type that has the following properties:

  • size_of::<SmolStr>() == 24 (therefore == size_of::<String>() on 64 bit platforms)
  • Clone is O(1)
  • Strings are stack-allocated if they are:
    • Up to 23 bytes long
    • Longer than 23 bytes, but substrings of WS (see src/lib.rs). Such strings consist solely of consecutive newlines, followed by consecutive spaces
  • If a string does not satisfy the aforementioned conditions, it is heap-allocated
  • Additionally, a SmolStr can be explicitly created from a &'static str without allocation

Unlike String, however, SmolStr is immutable. The primary use case for SmolStr is a good enough default storage for tokens of typical programming languages. Strings consisting of a series of newlines, followed by a series of whitespace are a typical pattern in computer programs because of indentation. Note that a specialized interner might be a better solution for some use cases.

Benchmarks

Run criterion benches with

cargo bench --bench \* -- --quick

MSRV Policy

Minimal Supported Rust Version: latest stable.

Bumping MSRV is not considered a semver-breaking change.