Re: [Neko] fastest way to read from stdin

[Kacper Gutowski]

There's another reason: reading by characters can not be fast.
Regardless the programming language, block I/O should be always preferred.

This should be faster but of course in some cases
it could not be used since it reads some data ahead.

var file_stdin = $loader.loadprim("s...@file_stdin", 0);
var file_read  = $loader.loadprim("s...@file_read",  4);

readline = {
  var in = file_stdin();
  var block = 1024;
  var eol = "\n";

  var ell = $ssize(eol);
  var s = "";

  function() {
    var e, r;
    try {
      while ($ssize(s)<1 || (e = $sfind(s, 0, eol)) == null) {
        var b = $smake(block);
        var l = file_read(in, b, 0, block);
        s ++= $ssub(b, 0, l);
      }
      r = $ssub(s, 0, e);
      s = $ssub(s, e+ell, $ssize(s)-e-ell);
    }
    catch _ if $ssize(s) > 0 { r = s; s = "" }
    return r;
  }
};

while ((line = readline()) != null) _


Works faster for me.

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