caxelrud oqagaupupavcom tried following simple code clientserver comunication xmlrpc wiindows xp windows vista python 25r2551908 vista hardware classified 2x faster got following results vista 101 sec xp 012 sec xp 100 times faster anybody seepup vista execution serverpy file import simplexmlrpcserver import math def addxy add two numbers return xy ssimplexmlrpcserversimplexmlrpcserverlocalhost8080 sregister_functionadd sregister_instancemath sregister_introspection_functions sserve_forever clientpy file import xmlrpclib import time sxmlrpclibserverproxyhttplocalhost8080 tinittimetime ij zipxrange10xrange1020 print saddij tendtimetime dtimetendtinit print dtimedtime raw_inputenter view message context httpwwwnabblecomwindowsvistaslowdownpythonxmlrpctp15872996p15872996html sent python pythonwin32 mailing list archive nabblecom _______________________________________________ pythonwin32 mailing list kpitckaew45pythonorg httpmailpythonorgmailmanlistinfopythonwin32 tue 05 aug 2008 202330 0800 pythonwin32 windows vista slow python xmlrpc