Kore Nordmann - PHP / Projects / Politics
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:Author: 		Kore Nordmann
:Date:			Thu, 29 Nov 2007 11:56:05 +0100
:Revision: 		6
:Copyright:		CC by-sa


====================
Image_3D performance
====================

:Description: A friend had a license for the ZendGuard, so that we tried the
  optimizing features with Image_3D, to test the performance benefits.

The `ZendGuard`__ offers optimization and encoding for your PHP code. I
visited a friend who ownes a license of ZendGuard so that we had the idea to
test it with something CPU intesinve like `Image_3D`__ . The results were
quiet surprising.

__ http://www.zend.com/de/products/zend_guard
__ http://pear.php.net/package/Image_3D

===============  =========  ========  =============  =======  =================  =================
Rendering times  PHP 5.1.4  with APC  ZendOptimizer  encoded  min. optimization  max. optimization
===============  =========  ========  =============  =======  =================  =================
raytracing       10.48s     10.40s    11.10s         13.35s   13.30s             13.30s
projection       0.47s      0.47s     0.48s          0.56s    0.56s              0.56s
===============  =========  ========  =============  =======  =================  =================

I was surprised that simply adding the ZendOptimizer to the php.ini caused a
performance breakdown by 5%, and encoding the code, with or without
optimization increased the performance loss to nearly 30%. I didn't expect a
great performance improvement from a bytecode cache, because the parsing is
very minor to all the calculations done while raytracing.

The improvements by `APC`__ (enabled optimization) are so minimal, that it can
be caused by statistical noise. All the times are the mean value of 5 to 10
iterations - the difference was minimal, so that I didn't see the need to test
it more often.

__ http://pecl.php.net/package/APC

I can understand, that the optimizer does not offer any real improvements,
like APC does, but I wouldn't expect such performance impact.

David at 11. May 2006 - 23:32
-----------------------------

We found similar results when we did Zend/ionCube benchmarking in Feb this
year - http://www.olate.co.uk/development/benchmarks.php


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