cgmath/benches/construction.rs

// Copyright 2013-2014 The CGMath Developers. For a full listing of the authors,
// refer to the AUTHORS file at the top-level directionectory of this distribution.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#![feature(test)]

extern crate rand;
extern crate test;
extern crate cgmath;

use rand::{IsaacRng, Rng};
use std::iter;
use test::Bencher;
use cgmath::{Quaternion, Basis2, Basis3, Vector3, Rotation2, Rotation3, Rad};

#[path="common/macros.rs"]
#[macro_use] mod macros;

fn bench_from_axis_angle<T: Rotation3<f32>>(bh: &mut Bencher) {
    const LEN: usize = 1 << 13;

    let mut rng = IsaacRng::new_unseeded();

    let axis: Vec<_> = iter::range(0, LEN).map(|_| rng.gen::<Vector3<f32>>()).collect();
    let angle: Vec<_> = iter::range(0, LEN).map(|_| rng.gen::<Rad<f32>>()).collect();
    let mut i = 0;

    bh.iter(|| {
        i = (i + 1) & (LEN - 1);

        unsafe {
            let res: T = Rotation3::from_axis_angle(axis.get_unchecked(i), *angle.get_unchecked(i));
            test::black_box(res)
        }
    })
}

#[bench]
fn _bench_quat_from_axisangle(bh: &mut Bencher) {
    bench_from_axis_angle::<Quaternion<f32>>(bh)
}

#[bench]
fn _bench_rot3_from_axisangle(bh: &mut Bencher) {
    bench_from_axis_angle::<Basis3<f32>>(bh)
}

bench_construction!(_bench_rot2_from_axisangle, Basis2<f32>, Rotation2::from_angle [ angle: Rad<f32> ]);

bench_construction!(_bench_quat_from_euler_angles, Quaternion<f32>, Rotation3::from_euler [roll: Rad<f32>, pitch: Rad<f32>, yaw: Rad<f32>]);
bench_construction!(_bench_rot3_from_euler_angles, Basis3<f32>, Rotation3::from_euler [roll: Rad<f32>, pitch: Rad<f32>, yaw: Rad<f32>]);