On Jul 15, 2005, at 7:51 AM, revDAVE wrote: > Test 2: loop 1 to 20000 in filemaker 6... > > activity Monitor = 96.5% CPU As a software developer this is unbelievable. If I'm understanding you correctly, your essentially telling FileMaker to count and do nothing during each iteration. Right? I wrote a program similar to yours in C to speed test my system. On any modern system it should complete almost instantly. On my single processor 1 Ghz G4 counting to 20000 and doing nothing takes 0.000544 seconds. This is so fast that the program doesn't even show up in Activity Monitor. If I do something like output some text during the loop then the program uses about 1% of the CPU. So, either FileMaker is unbelievably slow (someone said that had already been established) or I've misunderstood you.