string_literal.rb

Warming up --------------------------------------
          String.new   895.000  i/100ms
                  ''     1.713k i/100ms
Calculating -------------------------------------
          String.new      8.488k (± 3.8%) i/s -     42.960k in   5.068907s
                  ''     15.859k (± 3.5%) i/s -     80.511k in   5.082812s

Comparison:
                  '':    15858.6 i/s
          String.new:     8488.0 i/s - 1.87x  slower