// Copyright 2019 TiKV Project Authors. Licensed under Apache-2.0.

use rand::{thread_rng, RngCore};
use test::Bencher;

#[inline]
fn gen_rand_str(len: usize) -> Vec<u8> {
    let mut rand_str = vec![0; len];
    thread_rng().fill_bytes(&mut rand_str);
    rand_str
}

fn bench_slice_compare_less(b: &mut Bencher, n: usize) {
    let (s1, s2) = (gen_rand_str(n), gen_rand_str(n));
    b.iter(|| s1 < s2);
}

fn bench_slice_compare_greater(b: &mut Bencher, n: usize) {
    let (s1, s2) = (gen_rand_str(n), gen_rand_str(n));
    b.iter(|| s1 > s2);
}

#[bench]
fn bench_slice_compare_less_32(b: &mut Bencher) {
    bench_slice_compare_less(b, 32)
}

#[bench]
fn bench_slice_compare_less_64(b: &mut Bencher) {
    bench_slice_compare_less(b, 64)
}

#[bench]
fn bench_slice_compare_less_128(b: &mut Bencher) {
    bench_slice_compare_less(b, 128)
}

#[bench]
fn bench_slice_compare_greater_32(b: &mut Bencher) {
    bench_slice_compare_greater(b, 32)
}

#[bench]
fn bench_slice_compare_greater_64(b: &mut Bencher) {
    bench_slice_compare_greater(b, 64)
}

#[bench]
fn bench_slice_compare_greater_128(b: &mut Bencher) {
    bench_slice_compare_greater(b, 128)
}