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easejs/test/perf/perf-class-invoke-method.js

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JavaScript

/**
* Tests amount of time taken to invoke Class methods
*
* The expected results are as follows:
* - Method invocations are expected to be slower than invoking a method on a
* conventional constructor instance. This is because of the method wrapper
* used by ease.js.
* - Public methods externally should be invoked very quickly. They are part
* of the class's prototype and therefore easily accessible.
* - Public methods /internally/ are likely to be invoked slightly more
* slowly. This is because it takes one extra step down the prototype chain
* to access them. The difference should be minute.
* - Protected and private methods internally should be accessed fairly
* quickly since, like public methods externally, they are first on the
* prototype chain.
* - Protected members will be accessed more slowly than private members,
* because they are one step lower on the prototype chain. Future versions
* will remove this performance hit if the Class contains no private
* members.
*
* Copyright (C) 2010,2011 Mike Gerwitz
*
* This file is part of ease.js.
*
* ease.js is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser 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 Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @author Mike Gerwitz
*/
var common = require( __dirname + '/common.js' ),
Class = common.require( 'class' ),
count = 500000,
// used to ensure v8 doesn't optimize functions away
i = 0,
// instance of anonymous class
foo = Class( {
'public pub': function() { i++; },
'protected prot': function() { i++; },
'private priv': function() { i++; },
'public testInternal': function()
{
var _self = this;
common.test( function()
{
var i = count;
while ( i-- )
{
_self.pub();
}
}, count, 'Invoke public methods internally' );
common.test( function()
{
var i = count;
while ( i-- )
{
_self.prot();
}
}, count, 'Invoke protected methods internally' );
common.test( function()
{
var i = count;
while ( i-- )
{
_self.priv();
}
}, count, 'Invoke private methods internally' );
},
} )()
;
common.test( function()
{
var i = count;
while ( i-- )
{
foo.pub();
}
}, count, 'Invoke public methods externally' );
// run the same test internally
foo.testInternal();