1 /* 2 * [The "BSD licence"] 3 * Copyright (c) 2005-2008 Terence Parr 4 * All rights reserved. 5 * 6 * Conversion to C#: 7 * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 namespace Antlr3.Runtime.Test 34 { 35 using System; 36 using Antlr.Runtime; 37 using Antlr.Runtime.Tree; 38 using Microsoft.VisualStudio.TestTools.UnitTesting; 39 using System.Text; 40 41 [TestClass] 42 public class TestFastLexer 43 { 44 [TestMethod] TestBasicFastLexer()45 public void TestBasicFastLexer() 46 { 47 string inputElement = "x-2356*Abte+32+eno/6623+y"; 48 StringBuilder builder = new StringBuilder( inputElement, 1000000 * inputElement.Length ); 49 for ( int i = 0; i < 999999; i++ ) 50 builder.Append( inputElement ); 51 52 string text = builder.ToString(); 53 int iterations = 5; 54 // warmup 55 IterateFast( text, iterations ); 56 Iterate( text, iterations ); 57 58 var time = Iterate( text, iterations ); 59 var timeFast = IterateFast( text, iterations ); 60 61 Console.WriteLine( "Elapsed time (norm): {0} seconds.", time.TotalSeconds ); 62 Console.WriteLine( "Elapsed time (fast): {0} seconds.", timeFast.TotalSeconds ); 63 } 64 Iterate( string text, int count )65 TimeSpan Iterate( string text, int count ) 66 { 67 DateTime start = DateTime.Now; 68 69 for ( int i = 0; i < count; i++ ) 70 { 71 SimpleExpressionLexer lexer = new SimpleExpressionLexer( new ANTLRStringStream( text ) ); 72 CommonTokenStream tokens = new CommonTokenStream( lexer ); 73 tokens.Fill(); 74 } 75 76 return DateTime.Now - start; 77 } 78 IterateFast( string text, int count )79 TimeSpan IterateFast( string text, int count ) 80 { 81 DateTime start = DateTime.Now; 82 83 for ( int i = 0; i < count; i++ ) 84 { 85 FastSimpleExpressionLexer lexer = new FastSimpleExpressionLexer( new SlimStringStream( text ) ); 86 FastTokenStream tokens = new FastTokenStream( lexer ); 87 //FastTokenStream<SlimToken> tokens = new FastTokenStream<SlimToken>( lexer ); 88 tokens.FillBuffer(); 89 } 90 91 return DateTime.Now - start; 92 } 93 } 94 } 95