bench_read.rs

#![feature(test)]

extern crate test;

#[macro_use]
extern crate lazy_static;

#[cfg(test)]
mod tests {

    use test::Bencher;
    use std::io::Read;

    lazy_static! {
        static ref DATA: Vec<u8> = {
            vec![0u8; 100]
        };
    }

    #[bench]
    fn bench_read_manual(b: &mut Bencher) {
        let mut v: Vec<u8> = Vec::with_capacity(200);
        b.iter(|| {
            let mut data = DATA.as_slice();
            v.clear();
            let n = v.len();
            v.extend_from_slice(data);
            data = &data[n..];
        });
    }

    #[bench]
    fn bench_read_std(b: &mut Bencher) {
        let mut v = Vec::with_capacity(200);
        b.iter(|| {
            let mut data = DATA.as_slice();
            v.clear();
            data.read_to_end(&mut v).unwrap();
        });
    }
}