src/test/bench/std-smallintmap.rs

   1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 // Microbenchmark for the smallintmap library
  12
  13 #![feature(vecmap, duration, duration_span)]
  14
  15 use std::collections::VecMap;
  16 use std::env;
  17 use std::time::Duration;
  18
  19 fn append_sequential(min: usize, max: usize, map: &mut VecMap<usize>) {
  20     for i in min..max {
  21         map.insert(i, i + 22);
  22     }
  23 }
  24
  25 fn check_sequential(min: usize, max: usize, map: &VecMap<usize>) {
  26     for i in min..max {
  27         assert_eq!(map[i], i + 22);
  28     }
  29 }
  30
  31 fn main() {
  32     let args = env::args();
  33     let args = if env::var_os("RUST_BENCH").is_some() {
  34         vec!("".to_string(), "100000".to_string(), "100".to_string())
  35     } else if args.len() <= 1 {
  36         vec!("".to_string(), "10000".to_string(), "50".to_string())
  37     } else {
  38         args.collect()
  39     };
  40     let max = args[1].parse::<usize>().unwrap();
  41     let rep = args[2].parse::<usize>().unwrap();
  42
  43     let mut checkf = Duration::new(0, 0);
  44     let mut appendf = Duration::new(0, 0);
  45
  46     for _ in 0..rep {
  47         let mut map = VecMap::new();
  48         let d1 = Duration::span(|| append_sequential(0, max, &mut map));
  49         let d2 = Duration::span(|| check_sequential(0, max, &map));
  50
  51         checkf = checkf + d2;
  52         appendf = appendf + d1;
  53     }
  54
  55     let maxf = max as f64;
  56
  57     println!("insert(): {} seconds\n", checkf);
  58     println!("        : {} op/s\n", maxf / checkf.secs() as f64);
  59     println!("get()   : {} seconds\n", appendf);
  60     println!("        : {} op/s\n", maxf / appendf.secs() as f64);
  61 }