This script
function run() {
set(MUTE);
set(PLOTNOW);
StartDate = 20140301;
EndDate = 20140901;
BarPeriod = 60;
var atrx = ATR(200);
printf("\nMemory %i kb", memory()/1024);
}
gives the wild numbers above when run by Zorro under wine.
The same script reports consistent numbers (43MB I think) when run by Zorro within a Windows 7 VirtualBox instance.
Oddly, removing the ATR() line makes memory() result consistent under wine.
There are some discussions/bugs at winehq.org related to GetProcessMemoryInfo, which I can see now that I know what to search for. Thanks.