| /* |
| * [The "BSD licence"] |
| * Copyright (c) 2005-2008 Terence Parr |
| * All rights reserved. |
| * |
| * Conversion to C#: |
| * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| namespace Antlr3.Runtime.Test |
| { |
| using System; |
| using Antlr.Runtime; |
| using Antlr.Runtime.Tree; |
| using Microsoft.VisualStudio.TestTools.UnitTesting; |
| using System.Text; |
| |
| [TestClass] |
| public class TestFastLexer |
| { |
| [TestMethod] |
| public void TestBasicFastLexer() |
| { |
| string inputElement = "x-2356*Abte+32+eno/6623+y"; |
| StringBuilder builder = new StringBuilder( inputElement, 1000000 * inputElement.Length ); |
| for ( int i = 0; i < 999999; i++ ) |
| builder.Append( inputElement ); |
| |
| string text = builder.ToString(); |
| int iterations = 5; |
| // warmup |
| IterateFast( text, iterations ); |
| Iterate( text, iterations ); |
| |
| var time = Iterate( text, iterations ); |
| var timeFast = IterateFast( text, iterations ); |
| |
| Console.WriteLine( "Elapsed time (norm): {0} seconds.", time.TotalSeconds ); |
| Console.WriteLine( "Elapsed time (fast): {0} seconds.", timeFast.TotalSeconds ); |
| } |
| |
| TimeSpan Iterate( string text, int count ) |
| { |
| DateTime start = DateTime.Now; |
| |
| for ( int i = 0; i < count; i++ ) |
| { |
| SimpleExpressionLexer lexer = new SimpleExpressionLexer( new ANTLRStringStream( text ) ); |
| CommonTokenStream tokens = new CommonTokenStream( lexer ); |
| tokens.Fill(); |
| } |
| |
| return DateTime.Now - start; |
| } |
| |
| TimeSpan IterateFast( string text, int count ) |
| { |
| DateTime start = DateTime.Now; |
| |
| for ( int i = 0; i < count; i++ ) |
| { |
| FastSimpleExpressionLexer lexer = new FastSimpleExpressionLexer( new SlimStringStream( text ) ); |
| FastTokenStream tokens = new FastTokenStream( lexer ); |
| //FastTokenStream<SlimToken> tokens = new FastTokenStream<SlimToken>( lexer ); |
| tokens.FillBuffer(); |
| } |
| |
| return DateTime.Now - start; |
| } |
| } |
| } |