com.hazelcast.internal.util.Timer Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2021, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.internal.util;
import static java.util.concurrent.TimeUnit.NANOSECONDS;
/**
* Utility class to measure elapsed time in milliseconds. Backed by {@link System#nanoTime()}
* Example usage {@code
* long start = Timer.nanos();
* ... // do some work
* long elapsedNs = Timer.nanosElapsedSince(start);
* long elapsedMs = Timer.millisElapsedSince(start);
* }
*/
public final class Timer {
private Timer() {
}
public static long nanos() {
return System.nanoTime();
}
public static long nanosElapsed(long startNanos) {
return System.nanoTime() - startNanos;
}
public static long microsElapsed(long startNanos) {
return NANOSECONDS.toMicros(nanosElapsed(startNanos));
}
public static long millisElapsed(long startNano) {
return NANOSECONDS.toMillis(nanosElapsed(startNano));
}
public static long secondsElapsed(long startNano) {
return NANOSECONDS.toSeconds(nanosElapsed(startNano));
}
}