Go中无缓冲的输入管理器？

I am creating a simple console-based game in Go. I want some way to accept unbuffered input (as in, you type in one key and it is immediately returned). I started out with this code:

func InitInput() {
  exec.Command("stty", "-f", "/dev/tty", "cbreak", "min", "1").Run()
  exec.Command("stty", "-f", "/dev/tty", "-echo").Run()
}
func StopInput() {
  exec.Command("stty", "-f", "/dev/tty", "echo").Run()
}
func GetInput() string {
  var b []byte = make([]byte, 1)
  for {
    os.Stdin.Read(b)
    return string(b)
  }
}

This was amazing, but it only works on a *nix-based os, and requires 3 functions. Next, someone recommended this code for me:

/*
// Works also for 64 bits
#ifdef _WIN32

// Lib for console management in windows
#include "conio.h"

#else

// Libs terminal management in Unix, Linux...
#include <stdio.h>
#include <unistd.h>
#include <termios.h>

// Implement reading a key pressed in terminal
char getch(){
    char ch = 0;
    struct termios old = {0};
    fflush(stdout);
    if( tcgetattr(0, &old) < 0 ) perror("tcsetattr()");
    old.c_lflag &= ~ICANON;
    old.c_lflag &= ~ECHO;
    old.c_cc[VMIN] = 1;
    old.c_cc[VTIME] = 0;
    if( tcsetattr(0, TCSANOW, &old) < 0 ) perror("tcsetattr ICANON");
    if( read(0, &ch,1) < 0 ) perror("read()");
    old.c_lflag |= ICANON;
    old.c_lflag |= ECHO;
    if(tcsetattr(0, TCSADRAIN, &old) < 0) perror("tcsetattr ~ICANON");
    return ch;
}
#endif
*/
import "C"

And then you only need 1 function:

func GetInput() string {
    return string(byte(C.getch()))
}

This works perfectly, except that because of the way that cgo works, it is very slow which is not ideal for a game. Also, the original code for testing for a newline, if extras.GetInput() == " " {} doesn't work anymore. Is there a way to get a single-character unbuffered input manager to work in Go without using a big, thick, external library?