Hi,

for those who use the Quest cmdlets for AD, look this:

http://dmitrysotnikov.wordpress.com/2007/07/24/optimize-powershell-performance-and-memory-consumption/

http://daniellange.wordpress.com/2010/01/19/speeding-up-ad-object-retrieval/

http://www.pvgconsultants.com/news/workingwithdatasetsinarspolicyscripts%E2%80%93requestvsdirobjvsqadcmdlets

http://dmitrysotnikov.wordpress.com/2007/04/16/ad-cmdlets-and-wildcards/

http://powershellin.wordpress.com/2012/05/21/speed-up-searches/