generated.rs

#![feature(test)]

extern crate test;

use std::fs::File;
use std::io::{BufReader, BufRead};

#[bench]
fn scan_for_generated(bencher: &mut test::Bencher) {
    let mut large_file = String::new();
    for _ in 0..1000 {
        large_file.push_str("0123456789");
    }

    bencher.iter(|| {
        assert!(!test::black_box(&large_file).contains("@generated"));
    })
}

#[bench]
fn read_first_line(bencher: &mut test::Bencher) {
    bencher.iter(|| {
        let mut line = String::new();
        BufReader::new(File::open(file!()).unwrap()).read_line(&mut line).unwrap();
        assert!(!line.contains("@generated"));
    });
}