rust/src/test/bench/core-map.rs

// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

extern mod std;

use core::io;
use std::time;
use std::treemap::TreeMap;
use core::hashmap::{HashMap, HashSet};
use core::trie::TrieMap;

fn timed(label: &str, f: &fn()) {
    let start = time::precise_time_s();
    f();
    let end = time::precise_time_s();
    io::println(fmt!("  %s: %f", label, end - start));
}

fn ascending<M: Map<uint, uint>>(map: &mut M, n_keys: uint) {
    io::println(" Ascending integers:");

    do timed("insert") {
        for uint::range(0, n_keys) |i| {
            map.insert(i, i + 1);
        }
    }

    do timed("search") {
        for uint::range(0, n_keys) |i| {
            assert!(map.find(&i).unwrap() == &(i + 1));
        }
    }

    do timed("remove") {
        for uint::range(0, n_keys) |i| {
            assert!(map.remove(&i));
        }
    }
}

fn descending<M: Map<uint, uint>>(map: &mut M, n_keys: uint) {
    io::println(" Descending integers:");

    do timed("insert") {
        for uint::range_rev(n_keys, 0) |i| {
            map.insert(i, i + 1);
        }
    }

    do timed("search") {
        for uint::range_rev(n_keys, 0) |i| {
            assert!(map.find(&i).unwrap() == &(i + 1));
        }
    }

    do timed("remove") {
        for uint::range_rev(n_keys, 0) |i| {
            assert!(map.remove(&i));
        }
    }
}

fn vector<M: Map<uint, uint>>(map: &mut M, n_keys: uint, dist: &[uint]) {

    do timed("insert") {
        for uint::range(0, n_keys) |i| {
            map.insert(dist[i], i + 1);
        }
    }

    do timed("search") {
        for uint::range(0, n_keys) |i| {
            assert!(map.find(&dist[i]).unwrap() == &(i + 1));
        }
    }

    do timed("remove") {
        for uint::range(0, n_keys) |i| {
            assert!(map.remove(&dist[i]));
        }
    }
}

fn main() {
    let args = os::args();
    let n_keys = {
        if args.len() == 2 {
            uint::from_str(args[1]).get()
        } else {
            1000000
        }
    };

    let mut rand = vec::with_capacity(n_keys);

    {
        let rng = core::rand::seeded_rng([1, 1, 1, 1, 1, 1, 1]);
        let mut set = HashSet::new();
        while set.len() != n_keys {
            let next = rng.next() as uint;
            if set.insert(next) {
                rand.push(next);
            }
        }
    }

    io::println(fmt!("%? keys", n_keys));

    io::println("\nTreeMap:");

    {
        let mut map = TreeMap::new::<uint, uint>();
        ascending(&mut map, n_keys);
    }

    {
        let mut map = TreeMap::new::<uint, uint>();
        descending(&mut map, n_keys);
    }

    {
        io::println(" Random integers:");
        let mut map = TreeMap::new::<uint, uint>();
        vector(&mut map, n_keys, rand);
    }

    io::println("\nHashMap:");

    {
        let mut map = HashMap::new::<uint, uint>();
        ascending(&mut map, n_keys);
    }

    {
        let mut map = HashMap::new::<uint, uint>();
        descending(&mut map, n_keys);
    }

    {
        io::println(" Random integers:");
        let mut map = HashMap::new::<uint, uint>();
        vector(&mut map, n_keys, rand);
    }

    io::println("\nTrieMap:");

    {
        let mut map = TrieMap::new::<uint>();
        ascending(&mut map, n_keys);
    }

    {
        let mut map = TrieMap::new::<uint>();
        descending(&mut map, n_keys);
    }

    {
        io::println(" Random integers:");
        let mut map = TrieMap::new::<uint>();
        vector(&mut map, n_keys, rand);
    }
}