Description:
------------
Tested this with latest ImageMagick install and both 2.2.2 and 2.3.0beta with same result.

When paired with 5.3DEV04-15-2009 snapshot, the following very simple image resizing script would require an usually high amount of CPU processing time. On a quad core xeon system, the script wold cause 300% cpu usage.

This is not the case with 5.2.X where cpu usage is normal, in the single digitis, and the script runs very fast, as expected.

I ran this no other extension active except for imagick to finally isolate the problem to this.

Reproduce code:
---------------
size = 25;


$pic_data = file_get_contents("../static/images/default.png");        

or

$pic_data = blob from db;



$im = thumbnail::resize_blob($pic_data, $size, $size);
$output = $im->getimageblob();
$outputtype = $im->getFormat();
--------------------------------

thumbnail class

----------------

<?
class thumbnail {
	
	static public function resize_blob($blob, $i_width, $i_height) {
		$image = new Imagick();
		
		$image->readimageblob($blob);
		
		$image->cropThumbnailImage($i_width, $i_height);
	
		return $image;	
	}
}
?>




Expected result:
----------------
Very fast scaling of a 150x150png image/blob to 25x25png.

Actual result:
--------------
Extremely slow result with extremely high CPU spike.