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Masaki Hara (qnighy@qnmd.info)'s status on Thursday, 04-Oct-2018 20:17:24 JST Masaki Hara

https://users.rust-lang.org/t/announcing-smallbox-crate-on-stable-faster-heap-allocation-than-box/20951
小さいときはスタック、大きいときはヒープに保存するためのsmallboxクレートが安定版コンパイラで使えるようになったらしい。
In conversation Thursday, 04-Oct-2018 20:17:24 JST from qnmd.info permalink
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  Announcing `smallbox` crate on stable! Faster heap allocation than `Box`!
  
  from The Rust Programming Language Forum
  
  Annoncing smallbox 0.7 https://crates.io/crates/smallbox smallbox crate implements small box optimization that stores small item on the stack and fallback to heap as normal box for large item. And since 0.7, smallbox is available on stable rust (1.28.0+). Example use smallbox::SmallBox; use smallbox::space::S4; let small: SmallBox<_, S4> = SmallBox::new([0; 2]); let large: SmallBox<_, S4> = SmallBox::new([0; 32]); assert_eq!(small.len(), 2); assert_eq!(large.len(), 32); assert_eq!(*small, [...
- Satoshi Kojima repeated this.

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