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easejs/test/perf/common.js

95 lines
2.3 KiB
JavaScript

/**
* Common performance testing functionality
*
* Copyright (C) 2011, 2013, 2014 Free Software Foundation, Inc.
*
* This file is part of GNU ease.js.
*
* ease.js is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Stores start time
* @type {number}
*/
var start = 0;
/**
* Includes a module from the lib directory
*
* @param {string} name module name
*
* @return {Object} module exports
*/
exports.require = function( name )
{
return require( '../../lib/' + name );
};
/**
* A simple wrapper to perform testing and output the result
*
* The count is not used to call the function multiple times, because that would
* greatly impact the test results. Instead, you should pass the number of times
* the test was performed in a loop.
*
* @param {function()} test performance test to perform
* @param {number} count number of times the test was performed
* @param {string=} desc test description
*
* @return {undefined}
*/
exports.test = function( test, count, desc )
{
exports.start();
test();
exports.report( count, desc );
};
/**
* Starts the timer
*
* @return {undefined}
*/
exports.start = function()
{
start = ( new Date() ).getTime();
};
/**
* Outputs the time elapsed, followed by the description (if available)
*
* @param {number} count number of times the test was performed
* @param {string=} desc test description
*
* @return {undefined}
*/
exports.report = function( count, desc )
{
count = +count;
desc = desc || '';
var end = ( new Date() ).getTime(),
total = ( ( end - start ) / 1000 ).toFixed( 3 ),
pers = ( total / count ).toFixed( 10 )
;
console.log( "%s|%s|%s|%s", desc, count, pers, total );
};