openethereum/util/benches/rlp.rs

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// Copyright 2015, 2016 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
//! benchmarking for rlp
//! should be started with:
//! ```bash
//! multirust run nightly cargo bench
//! ```
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#![feature(test)]
extern crate test;
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extern crate rlp;
extern crate ethcore_bigint as bigint;
use test::Bencher;
use std::str::FromStr;
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use rlp::*;
use bigint::uint::U256;
#[bench]
fn bench_stream_u64_value(b: &mut Bencher) {
b.iter(|| {
// u64
let mut stream = RlpStream::new();
stream.append(&0x1023456789abcdefu64);
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let _ = stream.out();
});
}
#[bench]
fn bench_decode_u64_value(b: &mut Bencher) {
b.iter(|| {
// u64
let data = vec![0x88, 0x10, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef];
let rlp = Rlp::new(&data);
let _: u64 = rlp.as_val();
});
}
#[bench]
fn bench_stream_u256_value(b: &mut Bencher) {
b.iter(|| {
// u256
let mut stream = RlpStream::new();
stream.append(&U256::from_str("8090a0b0c0d0e0f009102030405060770000000000000001000000000\
00012f0")
.unwrap());
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let _ = stream.out();
});
}
#[bench]
fn bench_decode_u256_value(b: &mut Bencher) {
b.iter(|| {
// u256
let data = vec![0xa0, 0x80, 0x90, 0xa0, 0xb0, 0xc0, 0xd0, 0xe0, 0xf0, 0x09, 0x10, 0x20,
0x30, 0x40, 0x50, 0x60, 0x77, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x12, 0xf0];
let rlp = Rlp::new(&data);
let _ : U256 = rlp.as_val();
});
}
#[bench]
fn bench_stream_nested_empty_lists(b: &mut Bencher) {
b.iter(|| {
// [ [], [[]], [ [], [[]] ] ]
let mut stream = RlpStream::new_list(3);
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stream.begin_list(0);
stream.begin_list(1).begin_list(0);
stream.begin_list(2).begin_list(0).begin_list(1).begin_list(0);
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let _ = stream.out();
});
}
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#[bench]
fn bench_decode_nested_empty_lists(b: &mut Bencher) {
b.iter(|| {
// [ [], [[]], [ [], [[]] ] ]
let data = vec![0xc7, 0xc0, 0xc1, 0xc0, 0xc3, 0xc0, 0xc1, 0xc0];
let rlp = Rlp::new(&data);
let _v0: Vec<u16> = rlp.val_at(0);
let _v1: Vec<Vec<u16>> = rlp.val_at(1);
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let nested_rlp = rlp.at(2);
let _v2a: Vec<u16> = nested_rlp.val_at(0);
let _v2b: Vec<Vec<u16>> = nested_rlp.val_at(1);
});
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}
#[bench]
fn bench_stream_1000_empty_lists(b: &mut Bencher) {
b.iter(|| {
let mut stream = RlpStream::new_list(1000);
for _ in 0..1000 {
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stream.begin_list(0);
}
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let _ = stream.out();
});
}