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guava-tests/benchmark/com/google/common/base/StopwatchBenchmark.java
53 строки
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Vincent Potucek
Apply `UnnecessaryParentheses`.
11 авг 2025, 22:31
11 авг 2025, 22:31
7b9366e
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/* * Copyright (C) 2008 The Guava Authors * * 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.google.common.base; import static java.util.concurrent.TimeUnit.NANOSECONDS; import com.google.caliper.Benchmark; import org.jspecify.annotations.NullUnmarked; /** * Simple benchmark: create, start, read. This does not currently report the most useful result * because it's ambiguous to what extent the stopwatch benchmark is being affected by GC. * * @author Kevin Bourrillion */ @NullUnmarked public class StopwatchBenchmark { @Benchmark long stopwatch(int reps) { long total = 0; for (int i = 0; i < reps; i++) { Stopwatch s = Stopwatch.createStarted(); // here is where you would do something total += s.elapsed(NANOSECONDS); } return total; } @Benchmark long manual(int reps) { long total = 0; for (int i = 0; i < reps; i++) { long start = System.nanoTime(); // here is where you would do something total += System.nanoTime() - start; } return total; } }