http://graphics.stanford.edu/~seander/bithacks.html#BitReverseObvious

lower = faster

(RELEASE OPTIMIZATION)
1623007 three_operation
562320 four_operation
171495 seven_operation
149423 parallel_operation_char
41782 parallel_operation_char2
85028 parallel_operation_char3



(DEBUG)
1986420 three_operation
626790 four_operation
280403 seven_operation
339007 parallel_operation_char
84795 parallel_operation_char2
122648 parallel_operation_char3