gecko-dev/js/perf/tests/array/shift-001.js

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JavaScript

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is JavaScript Engine performance test.
*
* The Initial Developer of the Original Code is Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s): Mazie Lobo mazielobo@netscape.com
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* ***** END LICENSE BLOCK *****
*
*
* Date: 04 October 2002
* SUMMARY: Testing |shift()| method of an Array.
* Removes the first element from an array and returns that element.
* This method changes the length of the array.
*/
//-----------------------------------------------------------------------------
var UBOUND=1000000;
test();
function test()
{
var u_bound=UBOUND;
var status;
var start;
var end;
var i;
var j;
var elt0, elt1, elt2, elt3, elt4, elt5, elt6, elt7, elt8, elt9;
var arr0, arr1;
// shift array containing 1 elements
arr0 = new Array(elt0)
arr1=arr0;
status = "shift() - 1 element";
start = new Date();
for(i=0; i<u_bound; i++)
{
arr1.shift();
arr1=arr0;
}
end = new Date();
reportTime(status, start, end);
// shift array containing 5 elements
arr0 = new Array(elt0, elt1, elt2, elt3, elt4);
arr1=arr0;
status = "shift() - 5 elements";
start = new Date();
for(i=0; i<u_bound; i++)
{
for(j=0; j<4; j++)
{
arr1.shift();
}
arr1=arr0;
}
end = new Date();
reportTime(status, start, end);
// shift array containing 10 elements
arr0 = new Array(elt0, elt1, elt2, elt3, elt4, elt5, elt6, elt7, elt8, elt9);
arr1 = arr0;
status = "shift() - 10 elements";
start = new Date();
for(i=0; i<u_bound; i++)
{
for(j=0; j<9; j++)
{
arr1.shift();
}
arr1=arr0;
}
end = new Date();
reportTime(status, start, end);
}