time perl ch-flow.pl 922525 445 922524 445 906175 445 886953 445 615017 447 410011 449 820023 450 820022 450 818943 450 546681 452 970599 458 796095 468 767903 468 511935 470 927003 476 910107 476 704623 504 939497 507 626331 509 837799 525 real 0m4.661s user 0m47.057s sys 0m0.255s