The Tor Browser / file revision

 // |reftest| skip

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

 /*

  * Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/licenses/publicdomain/

  * Contributor: Jason Orendorff

  */

 //-----------------------------------------------------------------------------

 var summary = "Create a tree of threads";

 var N = 50;  // number of threads to create

 printStatus (summary);

 function range(start, stop) {

   var a = [];

   for (var i = start; i < stop; i++)

     a.push(i);

   return a;

 }

 function tree(start, stop) {

   sleep(0.001);

   if (start >= stop)

     return [];

   else if (start + 1 >= stop)

     return [start];

   sleep(0.001);

   let mid = start + Math.floor((stop - start) / 2);

   let halves = scatter([function () { return tree(start, mid); },

                         function () { return tree(mid, stop); }]);

   sleep(0.001);

   return Array.prototype.concat.apply([], halves);

 }

 var expect;

 var actual;

 if (typeof scatter == 'undefined' || typeof sleep == 'undefined') {

   print('Test skipped. scatter or sleep not defined.');

   expect = actual = 'Test skipped.';

 } else {

   expect = range(0, N).toSource();

   actual = tree(0, N).toSource();

 }

 reportCompare(expect, actual, summary);