104 lines
2.3 KiB
Rust
104 lines
2.3 KiB
Rust
// Copyright 2015-2017 Parity Technologies
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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//! benchmarking for bigint
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//! should be started with:
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//! ```bash
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//! rustup run nightly cargo bench
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//! ```
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#![feature(test)]
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#![feature(asm)]
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extern crate test;
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extern crate bigint;
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use test::{Bencher, black_box};
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use bigint::{U256, U512, U128};
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#[bench]
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fn u256_add(b: &mut Bencher) {
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b.iter(|| {
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let n = black_box(10000);
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let zero = black_box(U256::zero());
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(0..n).fold(zero, |old, new| { old.overflowing_add(U256::from(black_box(new))).0 })
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});
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}
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#[bench]
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fn u256_sub(b: &mut Bencher) {
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b.iter(|| {
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let n = black_box(10000);
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let max = black_box(U256::max_value());
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(0..n).fold(max, |old, new| { old.overflowing_sub(U256::from(black_box(new))).0 })
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});
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}
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#[bench]
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fn u512_sub(b: &mut Bencher) {
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b.iter(|| {
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let n = black_box(10000);
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let max = black_box(U512::max_value());
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(0..n).fold(
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max,
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|old, new| {
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let new = black_box(new);
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let p = new % 2;
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old.overflowing_sub(U512([p, p, p, p, p, p, p, new])).0
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}
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)
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});
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}
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#[bench]
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fn u512_add(b: &mut Bencher) {
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b.iter(|| {
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let n = black_box(10000);
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let zero = black_box(U512::zero());
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(0..n).fold(zero,
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|old, new| {
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let new = black_box(new);
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old.overflowing_add(U512([new, new, new, new, new, new, new, new])).0
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})
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});
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}
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#[bench]
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fn u256_mul(b: &mut Bencher) {
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b.iter(|| {
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let n = black_box(10000);
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let one = black_box(U256::one());
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(0..n).fold(one, |old, new| { old.overflowing_mul(U256::from(black_box(new))).0 })
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});
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}
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#[bench]
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fn u256_full_mul(b: &mut Bencher) {
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b.iter(|| {
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let n = black_box(10000);
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let one = black_box(U256::one());
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(0..n).fold(one,
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|old, new| {
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let new = black_box(new);
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let U512(ref u512words) = old.full_mul(U256([new, new, new, new]));
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U256([u512words[0], u512words[2], u512words[2], u512words[3]])
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})
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});
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}
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#[bench]
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fn u128_mul(b: &mut Bencher) {
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b.iter(|| {
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let n = black_box(10000);
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(0..n).fold(U128([12345u64, 0u64]), |old, new| { old.overflowing_mul(U128::from(new)).0 })
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});
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}
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