зеркало из https://github.com/mozilla/pjs.git
113 строки
3.4 KiB
JavaScript
Executable File
113 строки
3.4 KiB
JavaScript
Executable File
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is JavaScript Engine testing utilities.
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*
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* The Initial Developer of the Original Code is
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* Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2006
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s): Julien Lecomte
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* Igor Bukanov
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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var gTestfile = 'regress-313967-01.js';
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//-----------------------------------------------------------------------------
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var BUGNUMBER = 313967;
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var summary = 'Compile time of N functions should be O(N)';
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var actual = '';
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var expect = '';
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printBugNumber(BUGNUMBER);
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printStatus (summary);
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function F(x, y) {
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var a = x+y;
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var b = x-y;
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var c = a+b;
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return ( 2*c-1 );
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}
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function test(N)
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{
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var src = F.toSource(-1)+"\n";
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src = Array(N + 1).join(src);
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var counter = 0;
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src = src.replace(/F/g, function() { ++counter; return "F"+counter; })
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var now = Date.now;
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var t = now();
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eval(src);
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return now() - t;
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}
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var times = [];
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for (var i = 0; i != 10; ++i) {
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var time = test(1000 + i * 2000);
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times.push(time);
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gc();
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}
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var r = calculate_least_square_r(times);
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print('test times: ' + times);
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print("r coefficient for the estimation that eval is O(N) where N is number\n"+
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"of functions in the script: "+r);
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print( r < 0.97 ? "Eval time growth is not linear" : "The growth seems to be linear");
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reportCompare(true, r >= 0.97, summary);
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function calculate_least_square_r(array)
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{
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var sum_x = 0;
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var sum_y = 0;
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var sum_x_squared = 0;
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var sum_y_squared = 0;
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var sum_xy = 0;
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var n = array.length;
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for (var i = 0; i != n; ++i) {
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var x = i;
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var y = array[i];
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sum_x += x;
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sum_y += y;
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sum_x_squared += x*x;
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sum_y_squared += y*y;
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sum_xy += x*y;
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}
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var x_average = sum_x / n;
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var y_average = sum_y / n;
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var sxx = sum_x_squared - n * x_average * x_average;
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var syy = sum_y_squared - n * y_average * y_average;
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var sxy = sum_xy - n * x_average * y_average;
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var r = sxy*sxy/(sxx*syy);
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return r;
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}
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