56 lines
1.5 KiB
Rust
56 lines
1.5 KiB
Rust
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Performance timer with logging
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#[macro_use]
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extern crate log;
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use std::time::Instant;
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#[macro_export]
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macro_rules! trace_time {
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($name: expr) => {
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let _timer = $crate::PerfTimer::new($name);
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}
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}
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/// Performance timer with logging. Starts measuring time in the constructor, prints
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/// elapsed time in the destructor or when `stop` is called.
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pub struct PerfTimer {
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name: &'static str,
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start: Instant,
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}
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impl PerfTimer {
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/// Create an instance with given name.
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pub fn new(name: &'static str) -> PerfTimer {
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PerfTimer {
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name,
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start: Instant::now(),
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}
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}
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}
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impl Drop for PerfTimer {
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fn drop(&mut self) {
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let elapsed = self.start.elapsed();
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let ms = elapsed.subsec_nanos() as f32 / 1_000_000.0 +
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elapsed.as_secs() as f32 * 1_000.0;
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trace!(target: "perf", "{}: {:.2}ms", self.name, ms);
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}
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}
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