vendor/chrono-0.4.19/benches/serde.rs

extern crate chrono;
extern crate criterion;

use criterion::{black_box, criterion_group, criterion_main, Criterion};

use chrono::NaiveDateTime;

fn bench_ser_naivedatetime_string(c: &mut Criterion) {
    c.bench_function("bench_ser_naivedatetime_string", |b| {
        let dt: NaiveDateTime = "2000-01-01T00:00:00".parse().unwrap();
        b.iter(|| {
            black_box(serde_json::to_string(&dt)).unwrap();
        });
    });
}

fn bench_ser_naivedatetime_writer(c: &mut Criterion) {
    c.bench_function("bench_ser_naivedatetime_writer", |b| {
        let mut s: Vec<u8> = Vec::with_capacity(20);
        let dt: NaiveDateTime = "2000-01-01T00:00:00".parse().unwrap();
        b.iter(|| {
            let s = &mut s;
            s.clear();
            black_box(serde_json::to_writer(s, &dt)).unwrap();
        });
    });
}

criterion_group!(benches, bench_ser_naivedatetime_writer, bench_ser_naivedatetime_string);
criterion_main!(benches);