Crate features / hashbrown
Feature flags · hashbrown 0.17.1 · from crates.io 2026-10-24
hashbrown features: what each one does, and the line to copy
Short answerhashbrown 0.17.1 has 7 features. By default it turns on default-hasher, inline-more, allocator-api2, equivalent, raw-entry; add default-features = false to start from nothing. It needs Rust 1.85.0 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
default-hasher | yes | dep:foldhash |
inline-more | yes | nothing else (a switch the code checks) |
nightly | foldhash?/nightly, bumpalo/allocator_api | |
raw-entry | yes | nothing else (a switch the code checks) |
rustc-dep-of-std | nightly, core, alloc, rustc-internal-api | |
rustc-internal-api | nothing else (a switch the code checks) | |
serde | dep:serde_core, dep:serde |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version hashbrown declares (rust-version), and the release that changed it:
- 0.12.1 (2022-05-02): Rust 1.56.1
- 0.12.2 (2022-07-08): Rust 1.56.0
- 0.13.1 (2022-11-10): Rust 1.61.0
- 0.14.0 (2023-06-05): Rust 1.64.0
- 0.14.1 (2023-09-29): Rust 1.63.0
- 0.15.1 (2024-11-04): Rust 1.65.0
- 0.17.0 (2026-04-09): Rust 1.85.0
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p hashbrown --precise <version>, or use resolver 3, which picks compatible versions for you.
More on hashbrown
Real downloads, dependents and alternatives: hashbrown crate data (8.9M real downloads a day, 2,468 dependents).
Security record: hashbrown advisories.
docs.rs feature list · crates.io · license MIT OR Apache-2.0 · edition 2024
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