u256 to inline assembly opt

util/benches/bigint.rs

@@ -0,0 +1,37 @@
+// Copyright 2015, 2016 Ethcore (UK) Ltd.
+// 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
+//! ```
+
+#![feature(test)]
+
+extern crate test;
+extern crate ethcore_util;
+
+use test::{Bencher, black_box};
+use ethcore_util::uint::*;
+
+#[bench]
+fn u256_first_degree(b: &mut test::Bencher) {
+	b.iter(|| {
+		let n = black_box(10000);
+		(0..n).fold(U256::zero(), |old, new| { old.overflowing_add(U256::from(new)).0 })
+	});
+}