#none? should be much faster than select#empty?

∴ rake benchmarks:select_empty_versus_none
Calculating -------------------------------------
       select.empty?     2.581k i/100ms
               none?    12.755k i/100ms
-------------------------------------------------
       select.empty?     28.826k (± 6.3%) i/s -    144.536k
               none?    268.873k (± 5.9%) i/s -      1.352M

Comparison:
               none?:   268873.0 i/s
       select.empty?:    28826.3 i/s - 9.33x slower