wc2.cr

buf = Bytes.new 4096

words = 1
lines = 0
bytes_total = 0
nbytes = 0
while (bytes = ARGF.read buf) > 0
  bytes_total += bytes
  buf.each do |c|
    nbytes += 1
    # this next line is what takes all the time
    lines +=1 if c == 10 
  end
end
# why are nbytes and bytes_total different?
# it looks like buf.each keeps going after the end...
puts [lines, nbytes, bytes_total]