# io3 mloop, cin: 0, cout: 1, cerr: 1
# io3 fast, cin: 0, cout: 1, cerr: 1
# stdout, bytes read: 15 at offset 0
#> 39 39 30 31 30 32 20 2c 20 32 30 34 36 32 0a                                                    | 990102 , 20462.
# io3 fast, cin: 0, cout: 1, cerr: 1
# stdout, bytes read: 0 at offset 15
# stderr, bytes read: 0
# leaving _io3()
# _waitpid(22922) => pid: 22922, rc: