Mercurial > hg > graal-compiler
view test/testlibrary/ClassFileInstaller.java @ 8343:a3c30d467f96
unittest: just do a single JVM call
avoid multiple executions of the JVM in order to avoid high startup costs.
before:
> mx --vm server unittest 355.86s user 2.97s system 175% cpu 3:24.21 total
> mx --vm server longunittest 241.27s user 1.40s system 151% cpu 2:39.88 total
> mx --vm server shortunittest 203.36s user 2.23s system 269% cpu 1:16.42 total
after:
> mx --vm server unittest 202.39s user 1.02s system 130% cpu 2:36.04 total
> mx --vm server longunittest 187.39s user 0.97s system 126% cpu 2:28.38 total
> mx --vm server shortunittest 87.39s user 0.68s system 265% cpu 33.15 total
author | Bernhard Urban <bernhard.urban@jku.at> |
---|---|
date | Mon, 18 Mar 2013 15:11:52 +0100 |
parents | 1b0dc9f87e75 |
children | 43083e670adf |
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/* * Copyright (c) 2013, 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. */ import java.io.InputStream; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; import java.nio.file.StandardCopyOption; /** * Dump a class file for a class on the class path in the current directory */ public class ClassFileInstaller { /** * @param args The names of the classes to dump * @throws Exception */ public static void main(String... args) throws Exception { for (String arg : args) { ClassLoader cl = ClassFileInstaller.class.getClassLoader(); // Convert dotted class name to a path to a class file String pathName = arg.replace('.', '/').concat(".class"); InputStream is = cl.getResourceAsStream(pathName); // Create the class file's package directory Path p = Paths.get(pathName); Files.createDirectories(p.getParent()); // Create the class file Files.copy(is, p, StandardCopyOption.REPLACE_EXISTING); } } }