new hash call

require 'benchmark'

n = 1000000
Benchmark.bm do |x|
  x.report("Calling {}      ") do
    n.times{ hash = {} }
  end
  x.report("Calling Hash.new") do
    n.times{ hash = Hash.new }
  end
end

#         user     system      total        real
# Calling {}        0.230000   0.000000   0.230000 (  0.229510)
# Calling Hash.new  0.640000   0.000000   0.640000 (  0.653439)