52 lines
1.5 KiB
Rust
52 lines
1.5 KiB
Rust
// Copyright 2015-2017 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 time::precise_time_ns;
|
|
|
|
/// 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: u64,
|
|
stopped: bool,
|
|
}
|
|
|
|
impl PerfTimer {
|
|
/// Create an instance with given name.
|
|
pub fn new(name: &'static str) -> PerfTimer {
|
|
PerfTimer {
|
|
name: name,
|
|
start: precise_time_ns(),
|
|
stopped: false,
|
|
}
|
|
}
|
|
|
|
/// Stop the timer and print elapsed time on trace level with `perf` target.
|
|
pub fn stop(&mut self) {
|
|
if !self.stopped {
|
|
trace!(target: "perf", "{}: {:.2}ms", self.name, (precise_time_ns() - self.start) as f32 / 1000_000.0);
|
|
self.stopped = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Drop for PerfTimer {
|
|
fn drop(&mut self) {
|
|
self.stop()
|
|
}
|
|
}
|