easy way.

$chr(tokenNumber) $replace($remove(string,$chr(tokennumber) ),$chr(32),$chr(32) $+ $chr(tokenNumber))

$chr(35) $+ $replace($remove(lol lal #lol #test,$chr(35)),$chr(32),$chr(32) $+ $chr(35))

;--

#lol #lal #lol #test

x.x i dont like regex here is.. bla. mirc 6.16 is the best ;D

alias ctest {
  var %t = $ticks, %x = 100, %test
  while ( %x ) {
    %test = $chr($2) $+ $replace($remove($1,$chr($2) ),$chr(32),$chr(32) $+ $chr($2))
    dec %x
  }
  return simple. Time: $calc($ticks - %t) %test
}

nice..

//echo -a * $ctest(tehis #is a #test asd asd a #as asd # asd # asd ## a as a a aa sd a asd a asd a asd as asd asd asd asd asd as asd as dasd asd asdasd # asd a # asd # asda a # asd #asd as #a #asd #asda #reasa #adsaa #asd #asdae as asd a sdas asd as asd asd asd ad,35)

* simple. Time: 41 #tehis #is #a #test #asd #asd #a #as #asd #asd #asd # #a #as #a #a #aa #sd #a #asd #a #asd #a #asd #as #asd #asd #asd #asd #asd #as #asd #as #dasd #asd #asdasd #asd #a #asd #asda #a #asd #asd #as #a #asd #asda #reasa #adsaa #asd #asdae #as #asd #a #sdas #asd #as #asd #asd #asd #ad

40-43ms. basic code.