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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** 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 testing utilities.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2006
* the Initial Developer. All Rights Reserved.
*
* Contributor(s): Julien Lecomte
* Igor Bukanov
*
* 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
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
//-----------------------------------------------------------------------------
var BUGNUMBER = 313967;
var summary = 'Compile time of N functions should be O(N)';
var actual = '';
var expect = '';
printBugNumber(BUGNUMBER);
printStatus (summary);
function F(x, y) {
var a = x+y;
var b = x-y;
var c = a+b;
return ( 2*c-1 );
}
function test(N)
{
var src = F.toSource(-1)+"\n";
src = Array(N + 1).join(src);
var counter = 0;
src = src.replace(/F/g, function() { ++counter; return "F"+counter; })
var now = Date.now;
var t = now();
eval(src);
return now() - t;
}
var times = [];
for (var i = 0; i != 10; ++i) {
var time = test(1000 + i * 2000);
times.push(time);
gc();
}
var r = calculate_least_square_r(times);
print('test times: ' + times);
print("r coefficient for the estimation that eval is O(N) where N is number\n"+
"of functions in the script: "+r);
print( r < 0.97 ? "Eval time growth is not linear" : "The growth seems to be linear");
reportCompare(true, r >= 0.97, summary);
function calculate_least_square_r(array)
{
var sum_x = 0;
var sum_y = 0;
var sum_x_squared = 0;
var sum_y_squared = 0;
var sum_xy = 0;
var n = array.length;
for (var i = 0; i != n; ++i) {
var x = i;
var y = array[i];
sum_x += x;
sum_y += y;
sum_x_squared += x*x;
sum_y_squared += y*y;
sum_xy += x*y;
}
var x_average = sum_x / n;
var y_average = sum_y / n;
var sxx = sum_x_squared - n * x_average * x_average;
var syy = sum_y_squared - n * y_average * y_average;
var sxy = sum_xy - n * x_average * y_average;
var r = sxy*sxy/(sxx*syy);
return r;
}
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