Hi Chris,
Without using the Debug Agent, TestComplete can see only published native methods and properties. So, there is a workaround: create a helper object that will contain published wrapper methods and properties providing access to the needed information within your application. You can return an instance of this object via a published property of the form object.
Since you are testing the memory consumption and speed performance of your application, could you please tell me the difference between your application's release build and debug build containing the debug information? If you have not tested this yet, do this and share your results with us. I am guessing that you will not face a noticeable difference.