Mouse Move slow and blocks main thread : Win11

[andrewfstratton]

I am using the Move method to move the mouse pointer and I am seeing long main thread delays, e.g. 260ms, even 400ms,.

I have checked the following :

• running with the same location as the current mouse coordinates - this gives no (extra) delay
• just adding one pixel x (move) to the current location - this has long delays, e.g. 260ms

Separating the code out from my application, there is an interval function which mainly contains :

var last_time time.Time = time.Now()

func interval(move movePair) { // note: ignoring update to movePair
	new_time := time.Now()
	time_diff := new_time.Sub(last_time)
	last_time = new_time
	fmt.Println(time_diff)
...
        current_x, current_y := robotgo.Location()
        robotgo.Move(current_x+1, current_y, robotgo.GetMainId()) 
}

This is called through a goroutine containing :

	for {
		select {
		case new_move := <-moves: // get an update from a channel
		// do some update to move_pair
		case <-time.After(INTERVAL): // INTERVAL is 33ms
			interval(move_pair)
		}
	}

Note: I tried putting the robotogo move in a go routine but this made no noticeable difference - the main thread still delays.

[andrewfstratton]

Note that I have now tried using (win 11) the user32.dll and setCursorPos and this gives hardly ever any significant delay (above the 33.33ms) with max 58ms delay (i.e. actual 25ms) over 300 calls.

[andrewfstratton]

This appears to have been a combination of my code :| and windows suspending C calls within go routines - using a time difference is essential in this case.