1nr = 1_000_000 2i = 0 3msg = '.' 4buf = '.' 5begin 6 r, w = IO.pipe 7 while i < nr 8 i += 1 9 w.write_nonblock(msg, exception: false) 10 r.read_nonblock(1, buf, exception: false) 11 end 12rescue ArgumentError # old Rubies 13 while i < nr 14 i += 1 15 w.write_nonblock(msg) 16 r.read_nonblock(1, buf) 17 end 18ensure 19 r.close 20 w.close 21end 22