partial_sort

partial_sort是Rust版本的std::partial_sort

用法

use partial_sort::PartialSort;

fn main() {
    let mut vec = vec![4, 4, 3, 3, 1, 1, 2, 2];
    vec.partial_sort(4, |a, b| a.cmp(b));
    println!("{:?}", vec);
}

基准测试

首先我们比较在Macbook pro M1Max上对整个向量进行排序时会发生什么

partial sort 10000 limit 20                 time:   [5.2093 µs 5.2470 µs 5.2892 µs]
partial sort 10000 limit 200                time:   [15.742 µs 16.116 µs 16.645 µs]
partial sort 10000 limit 2000               time:   [117.99 µs 119.59 µs 121.32 µs]
partial sort 10000 limit 10000              time:   [281.40 µs 287.69 µs 295.43 µs]
stdsort 10000                               time:   [363.75 µs 366.93 µs 371.06 µs]
heapsort 10000                              time:   [253.89 µs 256.02 µs 258.35 µs]

partial reverse sort 10000 limit 20         time:   [5.7620 µs 6.0627 µs 6.5347 µs]
stdsort reverse 10000                       time:   [347.39 µs 355.88 µs 369.46 µs]

许可证

根据以下任何一个许可证授权

• Apache许可证2.0版 (LICENSE-APACHE 或 https://apache.ac.cn/licenses/LICENSE-2.0)
• MIT许可证 (LICENSE-MIT 或 http://opensource.org/licenses/MIT)