Mercurial > hg > truffle
view graal/com.oracle.max.graal.jtt/src/com/oracle/graal/jtt/jdk/System_nanoTime02.java @ 5060:4ed4295ce15f
Update import statements.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Thu, 08 Mar 2012 19:11:12 +0100 |
parents | ed559a528128 |
children |
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/* * Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.graal.jtt.jdk; import org.junit.*; /* */ public class System_nanoTime02 { public static boolean test() { long minDelta = Long.MAX_VALUE; // the first call to System.nanoTime might take a long time due to call resolution for (int c = 0; c < 10; c++) { long start = System.nanoTime(); long delta = 0; int i; for (i = 0; delta == 0 && i < 50000; i++) { delta = System.nanoTime() - start; // do nothing. } if (delta < minDelta) { minDelta = delta; } } // better get at least 30 microsecond resolution. return minDelta > 1 && minDelta < 30000; } @Test public void run0() throws Throwable { Assert.assertEquals(true, test()); } }