mirror of
https://github.com/mimblewimble/grin.git
synced 2025-01-21 11:31:08 +03:00
75 lines
2.2 KiB
Rust
75 lines
2.2 KiB
Rust
// Copyright 2016 The Grin Developers
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#![feature(test)]
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extern crate test;
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extern crate rand;
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extern crate grin_core as core;
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use rand::Rng;
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use test::Bencher;
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use core::core::sumtree::{self, SumTree, Summable};
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use core::ser::{Writeable, Writer, Error};
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#[derive(Copy, Clone, Debug)]
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struct TestElem([u32; 4]);
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impl Summable for TestElem {
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type Sum = u64;
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fn sum(&self) -> u64 {
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// sums are not allowed to overflow, so we use this simple
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// non-injective "sum" function that will still be homomorphic
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self.0[0] as u64 * 0x1000 + self.0[1] as u64 * 0x100 + self.0[2] as u64 * 0x10 +
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self.0[3] as u64
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}
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}
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impl Writeable for TestElem {
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fn write<W: Writer>(&self, writer: &mut W) -> Result<(), Error> {
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try!(writer.write_u32(self.0[0]));
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try!(writer.write_u32(self.0[1]));
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try!(writer.write_u32(self.0[2]));
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writer.write_u32(self.0[3])
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}
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}
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#[bench]
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fn bench_small_tree(b: &mut Bencher) {
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let mut rng = rand::thread_rng();
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b.iter(|| {
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let mut big_tree = SumTree::new();
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for i in 0..1000 {
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// To avoid RNG overflow we generate random elements that are small.
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// Though to avoid repeat elements they have to be reasonably big.
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let new_elem;
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let word1 = rng.gen::<u16>() as u32;
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let word2 = rng.gen::<u16>() as u32;
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if rng.gen() {
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if rng.gen() {
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new_elem = TestElem([word1, word2, 0, 0]);
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} else {
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new_elem = TestElem([word1, 0, word2, 0]);
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}
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} else {
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if rng.gen() {
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new_elem = TestElem([0, word1, 0, word2]);
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} else {
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new_elem = TestElem([0, 0, word1, word2]);
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}
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}
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big_tree.push(new_elem);
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}
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});
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}
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