I have a string of about 8000000 UTF-8 characters. Scanning it via fmt.Scanf() takes about 10 seconds, how can I do it faster? I have a Go wrapper for C scanf() function that was written by my teacher as a workaround for some bugs in Go's fmt.Scanf(), it works in 1-2 seconds, but I don't like using side packages for such simple tasks. Could you suggest some faster way of reading strings in pure Go?
Found the solution. bufio works much faster (as it's buffered, and fmt's functions are not, and it doesn't parse anything):
reader := bufio.NewReader(os.Stdin)
str, _ := reader.ReadString('
') // Like fmt.Scanf("%s", &str), but faster
var x, y rune
fmt.Fscanf(reader, "%c %c", &x, &y) // I need to read something else
// (see comments for the question)
// It's easy, as I can use fmt.Fscanf
...even faster that that C scanf() wrapper.