Revision 613027 of ParallelArray

Revision slug: Web/JavaScript/Reference/Global_Objects/ParallelArray
Revision title: ParallelArray
Revision id: 613027
Created: Jun 4, 2014, 4:58:14 AM
Creator: fscholz
Is current revision? No
Comment

Tags:

Revision Content

Note: As of {{ Gecko(22) }}, this object is disabled in the Beta, Release and ESR channels ({{ bug(853067) }}). This object has been removed from {{ Gecko(29) }} in favor of ParallelJS (PJS) currently available in the Nightly channel ({{ bug(944074) }}).

Summary

The goal of ParallelArray is to enable data-parallelism in web applications. The higher-order functions available on ParallelArray attempt to execute in parallel, though they may fall back to sequential execution if necessary. To ensure that your code executes in parallel, it is suggested that the functions should be limited to the parallelizable subset of JS that Firefox supports.

Syntax

new ParallelArray()
new ParallelArray([element0, element1, ...])
new ParallelArray(arrayLength, elementalFunction)

`ParallelArray` instances

Properties

length: Reflects the number of elements in the ParallelArray.

Methods

map: Apply map callback to array elements.
reduce
scan
scatter: Scatter array elements.
filter
flatten
partition
get: Get ParallelArray element.

Examples

Example: Using map in parallel

var p = new ParallelArray([0, 1, 2, 3, 4]);
var m = p.map(function (v) {
  return v + 1;
});

Revision Source

<p>{{ fx_minversion_section(17) }}</p>
<p>{{ obsolete_header(29) }}</p>
<p>{{ Non-standard_header() }}</p>
<div class="note">
 <p><strong>Note:</strong> As of {{ Gecko(22) }}, this object is disabled in the Beta, Release and ESR channels ({{ bug(853067) }}). This object has been removed from {{ Gecko(29) }} in favor of ParallelJS (PJS) currently available in the Nightly channel ({{ bug(944074) }}).</p>
</div>
<h2 id="Summary">Summary</h2>
<p>The goal of ParallelArray is to enable data-parallelism in web applications. The higher-order functions available on ParallelArray attempt to execute in parallel, though they may fall back to sequential execution if necessary. To ensure that your code executes in parallel, it is suggested that the functions should be limited to the <a href="https://smallcultfollowing.com/babysteps/blog/2013/04/30/parallelizable-javascript-subset/" title="/en-US/docs/ParallelizableJavaScriptSubset">parallelizable subset of JS that Firefox supports</a>.</p>
<h2 id="Syntax">Syntax</h2>
<pre class="syntaxbox">
new ParallelArray()
new ParallelArray([element0, element1, ...])
new ParallelArray(arrayLength, elementalFunction)</pre>
<h2 id="ParallelArray_instances"><code>ParallelArray</code> instances</h2>
<h3 id="Properties">Properties</h3>
<dl>
 <dt>
  length</dt>
 <dd>
  Reflects the number of elements in the <code>ParallelArray</code>.</dd>
</dl>
<h3 id="Methods">Methods</h3>
<dl>
 <dt>
  map</dt>
 <dd>
  Apply map callback to array elements.</dd>
 <dt>
  reduce</dt>
 <dd>
  &nbsp;</dd>
 <dt>
  scan</dt>
 <dt>
  scatter</dt>
 <dd>
  Scatter array elements.</dd>
 <dt>
  filter</dt>
 <dt>
  flatten</dt>
 <dt>
  partition</dt>
 <dt>
  get</dt>
 <dd>
  Get ParallelArray element.</dd>
</dl>
<h2 id="Examples">Examples</h2>
<h3 id="Example.3A_Using_map_in_parallel">Example: Using map in parallel</h3>
<pre class="brush: js">
var p = new ParallelArray([0, 1, 2, 3, 4]);
var m = p.map(function (v) {
  return v + 1;
});</pre>
<h2 id="See_also">See also</h2>
<ul>
 <li><a href="https://wiki.ecmascript.org/doku.php?id=strawman:data_parallelism" title="https://wiki.ecmascript.org/doku.php?id=strawman:data_parallelism">Ecmascript ParallelArray strawman</a></li>
</ul>

Revert to this revision