97 lines
2.3 KiB
JavaScript
97 lines
2.3 KiB
JavaScript
/**
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* Common performance testing functionality
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*
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* Copyright (C) 2011, 2013 Mike Gerwitz
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*
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* This file is part of GNU ease.js.
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*
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* ease.js is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Stores start time
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* @type {number}
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*/
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var start = 0;
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/**
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* Includes a module from the lib directory
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*
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* @param {string} name module name
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*
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* @return {Object} module exports
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*/
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exports.require = function( name )
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{
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return require( '../../lib/' + name );
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};
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/**
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* A simple wrapper to perform testing and output the result
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*
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* The count is not used to call the function multiple times, because that would
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* greatly impact the test results. Instead, you should pass the number of times
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* the test was performed in a loop.
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*
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* @param {function()} test performance test to perform
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* @param {number} count number of times the test was performed
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* @param {string=} desc test description
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*
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* @return {undefined}
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*/
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exports.test = function( test, count, desc )
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{
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exports.start();
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test();
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exports.report( count, desc );
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};
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/**
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* Starts the timer
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*
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* @return {undefined}
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*/
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exports.start = function()
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{
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start = ( new Date() ).getTime();
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};
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/**
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* Outputs the time elapsed, followed by the description (if available)
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*
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* @param {number} count number of times the test was performed
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* @param {string=} desc test description
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*
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* @return {undefined}
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*/
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exports.report = function( count, desc )
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{
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count = +count;
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desc = desc || '';
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var end = ( new Date() ).getTime(),
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total = ( ( end - start ) / 1000 ).toFixed( 3 ),
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pers = ( total / count ).toFixed( 10 )
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;
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console.log( total + "s (x" + count + " = " + pers + "s each)" +
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( ( desc ) ? ( ': ' + desc ) : '' )
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);
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};
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