Learning DCOM

Performance Results for ThreadingModel=“Free”

This section captures the performance results when the ThreadingModel of CLSID_Details is ThreadingModel="Free". To make the discussion easier, concentrate on the VoidCall column in each table.

A key point to note for Table B-7: for in-process method invocations, the client and the server exist in different apartments. This implies that marshaling will take place.

Here is a key point to note for Table B-8 and Table B-9: for in-process method invocations, the client and the server share the same apartment, implying that method invocations will be direct method calls.

Table B-7. Client Apartment: STA (Secondary STA Thread)

	FirstCall	VoidCall	ArrayCall	LongCall
In-process	0.000119	0.000108	0.000113	0.000924
Local	0.000866	0.000463	0.000268	0.001908
Remote	0.039941	0.001799	0.001965	0.017295

Table B-8. Client Apartment: MTA (MTAThread1)

	FirstCall	VoidCall	ArrayCall	LongCall
In-process	0.000005	0.000005	0.000005	0.000006
Local	0.000609	0.000090	0.000097	0.000742
Remote	0.037247	0.001719	0.001882	0.016600

Table B-9. Client Apartment: MTA (MTAThread2)

	FirstCall	VoidCall	ArrayCall	LongCall
In-process	0.000005	0.000004	0.000005	0.000006
Local	0.000841	0.000094	0.000100	0.000748
Remote	0.037925	0.001698	0.001895	0.016808