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