Julia Dict() execution time

dict.jl

dict = Dict()
@time for i in [1:10000000]
  dict[i] = 1
end
# elapsed time: 22.824151615 seconds (2413509808 bytes allocated, 9.20% gc time)

dict = Dict()
@time for i in [1:10000]
  dict[i] = 1
end
# elapsed time: 0.006612668 seconds (1248832 bytes allocated)

dict_with_type.jl

dict = Dict{Int, Int}()
@time for i in [1:10000000]
  dict[i] = 1
end
# elapsed time: 3.033477899 seconds (807448656 bytes allocated, 2.43% gc time)

dict = Dict{Int, Int}()
@time for i in [1:10000]
  dict[i] = 1
end
# elapsed time: 0.000807427 seconds (604368 bytes allocated)

env.sh

$ ruby -v
ruby 2.1.0p0 (2013-12-25 revision 44422) [x86_64-darwin13.0]

$ julia --version
julia version 0.4.0-dev+1752

hash.rb

require 'benchmark'

hash = {}
Benchmark.bmbm do |x|
  x.report { 10000000.times{|i| hash[i] = 1 } }
end
#Rehearsal ------------------------------------
#   9.100000   0.430000   9.530000 ( 10.012342)
#--------------------------- total: 9.530000sec
#
#       user     system      total        real
#   5.290000   0.060000   5.350000 (  5.509731)

hash = {}
Benchmark.bmbm do |x|
  x.report { 10000.times{|i| hash[i] = 1 } }
end
#Rehearsal ------------------------------------
#   0.010000   0.000000   0.010000 (  0.003642)
#--------------------------- total: 0.010000sec
#
#       user     system      total        real
#   0.000000   0.000000   0.000000 (  0.002021)