| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.pig.test; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| |
| import org.apache.pig.EvalFunc; |
| import org.apache.pig.builtin.InvokeForDouble; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.data.TupleFactory; |
| import org.junit.Test; |
| |
| /** |
| * Tests {@link Invoker} speed comparing to raw calculation. |
| */ |
| public class TestInvokerSpeed { |
| |
| private final TupleFactory tf_ = TupleFactory.getInstance(); |
| |
| @Test |
| public void testSpeed() throws IOException, SecurityException, ClassNotFoundException, NoSuchMethodException { |
| EvalFunc<Double> log = new Log(); |
| Tuple tup = tf_.newTuple(1); |
| long start = System.currentTimeMillis(); |
| for (int i=0; i < 1000000; i++) { |
| tup.set(0, (double) i); |
| log.exec(tup); |
| } |
| long staticSpeed = (System.currentTimeMillis()-start); |
| start = System.currentTimeMillis(); |
| log = new InvokeForDouble("java.lang.Math.log", "Double", "static"); |
| for (int i=0; i < 1000000; i++) { |
| tup.set(0, (double) i); |
| log.exec(tup); |
| } |
| long dynamicSpeed = System.currentTimeMillis()-start; |
| System.err.println("Dynamic to static ratio: "+((float) dynamicSpeed)/staticSpeed); |
| assertTrue( ((float) dynamicSpeed)/staticSpeed < 5); |
| } |
| |
| private class Log extends EvalFunc<Double> { |
| |
| @Override |
| public Double exec(Tuple input) throws IOException { |
| Double d = (Double) input.get(0); |
| return Math.log(d); |
| } |
| |
| } |
| } |