michael@0: // |reftest| skip -- bogus perf test (bug 540512)
michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER = 451673;
michael@0: var summary = 'TM: Tracing prime number generation';
michael@0: var actual = '';
michael@0: var expect = '';
michael@0: 
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: test();
michael@0: //-----------------------------------------------------------------------------
michael@0: 
michael@0: function test()
michael@0: {
michael@0:   enterFunc ('test');
michael@0:   printBugNumber(BUGNUMBER);
michael@0:   printStatus (summary);
michael@0: 
michael@0:   function doTest(enablejit)
michael@0:   {
michael@0:     if (enablejit)
michael@0:       jit(true);
michael@0:     else
michael@0:       jit(false);
michael@0: 
michael@0:     var n = 1000000;
michael@0:     var start = new Date();
michael@0:     var i=0;
michael@0:     var j=0;
michael@0:     var numprimes=0;
michael@0:     var limit=0;
michael@0:     numprimes = 1; // 2 is prime
michael@0:     var mceil = Math.floor;
michael@0:     var msqrt = Math.sqrt;
michael@0:     var isPrime = 1;
michael@0: 
michael@0:     for (i = 3; i<= n; i+=2)
michael@0:     {
michael@0: 	    isPrime=1;
michael@0: 	    limit = mceil(msqrt(i)+1) + 1;
michael@0: 
michael@0: 	    for (j = 3; j < limit; j+=2)
michael@0:       {
michael@0: 		    if (i % j == 0)
michael@0:         {
michael@0: 			    isPrime = 0;
michael@0: 			    break;
michael@0:         }
michael@0:       }
michael@0: 
michael@0: 	    if (isPrime)
michael@0:       {
michael@0: 		    numprimes ++;
michael@0:       }
michael@0:     }
michael@0: 
michael@0:     var end = new Date();
michael@0: 
michael@0:     var timetaken = end - start;
michael@0:     timetaken = timetaken / 1000;
michael@0: 
michael@0:     if (enablejit)
michael@0:       jit(false);
michael@0: 
michael@0:     print((enablejit ? '    JIT' : 'Non-JIT') + ": Number of primes up to: " + n + " is " + numprimes + ", counted in " + timetaken + " secs.");
michael@0: 
michael@0:     return timetaken;
michael@0:   }
michael@0: 
michael@0:   var timenonjit = doTest(false);
michael@0:   var timejit    = doTest(true);
michael@0: 
michael@0:   expect = true;
michael@0:   actual = timejit < timenonjit;
michael@0: 
michael@0:   reportCompare(expect, actual, summary);
michael@0: 
michael@0:   exitFunc ('test');
michael@0: }