On Thu, 20 Apr 2006, Zhukov Pavel wrote: I don't know, though I might cattily guess that execution on Windows is slowed down by a burden of viruses and general invisible crap running in the background. But there may be inefficiencies in GTK on win32. Could you post the script so I can test it here? On Windows, are you running the script using gretlcli.exe, or using the GUI program, gretlw32.exe? (Hint: I suspect gretlcli may be a lot faster.) Allin