1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52
// Copyright 2015-2018 Parity Technologies (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/>. //! Performance timer with logging use log::trace; use std::time::Instant; #[macro_export] macro_rules! trace_time { ($name: expr) => { let _timer = $crate::PerfTimer::new($name); }; } /// Performance timer with logging. Starts measuring time in the constructor, prints /// elapsed time in the destructor or when `stop` is called. pub struct PerfTimer { name: &'static str, start: Instant, } impl PerfTimer { /// Create an instance with given name. pub fn new(name: &'static str) -> PerfTimer { PerfTimer { name, start: Instant::now(), } } } impl Drop for PerfTimer { fn drop(&mut self) { let elapsed = self.start.elapsed(); let ms = elapsed.as_millis(); trace!(target: "perf", "{}: {:.2}ms", self.name, ms); } }