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?
大UTF-8字符串的快速fmt.Scanf()
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- dongruyan4948 2013-02-17 19:13关注
Found the solution.
bufio
works much faster (as it's buffered, andfmt
'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()
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