arrays - Best practices to take input -

i have written mergesort function, sorted 1 million integers in 750ms, takes 9 seconds take input.

this how have taken input slice, sorted.

code snippet:

array := make([]int,n) := 0; < n; i++ {     fmt.scanf("%d",&array[i]) } 

what need is, efficient way take integers input slice. input contains integers, seperated space or each integer in new-line.

sample input 1:

3 9 1 13 

sample input 2:

3 9 1 13

if efficient solution available 1 type of input, suffice

on assumption input space separated signed integers (in base 10), try following:

s := bufio.newscanner(os.stdin) s.split(bufio.scanwords) := 0 s.scan() && < n {     dest[i], _ = strconv.parseint(s.text(), 10, 64)     i++ } 

this shows quick benchmark 5 times faster using fmt.scanf. further optimised writing custom split function did not worry parsing utf-8 runes , split on ' '.