[Profiler] NFC: Add some comments
[Profiler] NFC: Add some comments

roambotics/swift,glessard/swift,glessard/swift,glessard/swift,benlangmuir/swift,apple/swift,benlangmuir/swift,roambotics/swift,benlangmuir/swift,glessard/swift,glessard/swift,apple/swift,glessard/swift,apple/swift,apple/swift,roambotics/swift,benlangmuir/swift,apple/swift,benlangmuir/swift,apple/swift,benlangmuir/swift,roambotics/swift,roambotics/swift,roambotics/swift