slower KeyTap on first call

[zhengpd]

The first call of KeyTap takes more time than subsequent call. Any way to reduce the execution time?

package main

import (
	"time"
	"fmt"

	"github.com/go-vgo/robotgo"
)

func main() {
	robotgo.KeySleep = 1

	start1 := time.Now()
	robotgo.KeyTap("left")
	fmt.Printf("1st elapsed %s \n", time.Since(start1))

	start2 := time.Now()
	robotgo.KeyTap("left")
	fmt.Printf("2nd elapsed %s", time.Since(start2))
}

1st elapsed 96.107292ms 
2nd elapsed 4.535375ms