re_bench.rs

#![feature(test)]

extern crate regex;
extern crate test;

use regex::Regex;
use test::{black_box, Bencher};

const SAMPLE: &str = "one two three four five six seven eight nine ten eleven twelve";

#[bench]
fn with_dots(b: &mut Bencher) {
	let re = Regex::new(".*eleven.*").unwrap();

	b.iter(|| {
		black_box(re.is_match(black_box(SAMPLE)))
	});
}

#[bench]
fn with_dots_and_s_mode(b: &mut Bencher) {
	let re = Regex::new("(?s).*eleven.*").unwrap();

	b.iter(|| {
		black_box(re.is_match(black_box(SAMPLE)))
	});
}

#[bench]
fn without_dots(b: &mut Bencher) {
	let re = Regex::new("eleven").unwrap();

	b.iter(|| {
		black_box(re.is_match(black_box(SAMPLE)))
	});
}

#[bench]
fn without_front_dots(b: &mut Bencher) {
	let re = Regex::new("eleven.*").unwrap();

	b.iter(|| {
		black_box(re.is_match(black_box(SAMPLE)))
	});
}

#[bench]
fn without_back_dots(b: &mut Bencher) {
	let re = Regex::new(".*eleven").unwrap();

	b.iter(|| {
		black_box(re.is_match(black_box(SAMPLE)))
	});
}