Exactly as described, this is a simple on/off switch enabling the throughput sub-test, finding the maximum zero-drop rate, as part of this profile's overall test run. Because MaxSearches, FrameLossStartBw, and several other fields elsewhere in this profile only take effect if their corresponding sub-test is actually enabled here, turning this off means those related settings are simply ignored for that run rather than causing an error, a subtle source of confusion when a configured setting appears to have no effect. For example, a profile with a carefully tuned MaxSearches value of 16 but ThroughputTest left false would run its other enabled sub-tests normally while that specific tuning silently never gets used.