1
0
Fork 0
easejs/test/perf/perf-class-invoke-method.js

137 lines
3.8 KiB
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) 2011, 2013 Mike Gerwitz
*
* 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/>.
*/
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();
// allows us to compare private method invocation times with method
// invocations on a conventional prototype (the increment of `i` is to
// ensure that the function is not optimized away)
( function()
{
var p = function() {};
p.prototype.foo = function() { i++ };
var o = new p();
common.test( function()
{
var i = count;
while ( i-- ) o.foo();
}, count, '[baseline] Invoke method on prototype' );
} )();
// compare with plain old function invocation
( function()
{
var f = function() { i++ };
common.test( function()
{
var i = count;
while ( i-- ) f();
}, count, '[baseline] Invoke function' );
} )();