Hi George

May I ask why you did not put these lines at the start... (notice I dropped the procedure line). That way I could just copy the entire thing into a single new prg and run it.

oTest = CREATEOBJECT('MTest')
* Make sure that the code is in memory
oTest.TestMDot(1, 1)
* Run the test 10 times with a million iterations
oTest.TestMDot(10, 1000000)

By making _screen invisible, I watched Windows redraw my desktop. Isn't that still happening as the test begins? Not to mention it makes it look like VFP crashed without any c5 <g>

Do you also use APPEND BLANK ... GATHER MEMVAR instead of INSERT FROM MEMVAR as a regular practice? I'm not criticising, just surprised.