bbtree released with ordered-map performance claims
What happened
On October 25, 2026, the Hacker News front page covered bbtree, a Rust ordered map implementation released by Xiangpeng Hao. The report calls it "the fastest ordered map" and lists performance comparisons by thread count: on a single thread, bbtree is 5x faster than Rust's standard BTreeMap; at 96 threads, it is 12x faster than crossbeam-skiplist. The report also says it uses 30% less memory, but does not say what that figure is measured against. Coverage focuses on the release and these performance numbers, with no integration progress.
Written by AI from the coverage · updated 2 hours ago
Coverage
Follow the reports to see the story from different sides.
- Hacker News front pageBbtree: Fastest Ordered Map
Xiangpeng Hao 发布 Rust 有序 Map 实现 bbtree，单线程比 std 的 BTreeMap 快 5 倍，96 线程下比 crossbeam-skiplist 快 12 倍，内存占用低 30%。
Heat over time
Not enough continuous observations to draw a trend yet.