benchmark each_with_object

gistfile1.rb

# each_with_index, each_with_object and inject({})  are all  %50 slower then #each

# simple each with an addition noop
[4] pry(main)> puts Benchmark.measure { (1..10_000_000).each { |i| i + 1 } }
  0.450000   0.000000   0.450000 (  0.448808)

# each_with_index 
[5] pry(main)> puts Benchmark.measure { (1..10_000_000).each_with_index  { |i, index| i + 1 } }
  0.650000   0.000000   0.650000 (  0.645812)

# each_with_object 
[6] pry(main)> puts Benchmark.measure { (1..10_000_000).each_with_object({})  { |i, hash| i + 1 } }
  0.640000   0.000000   0.640000 (  0.641546)

# using inject style
[8] pry(main)> puts Benchmark.measure { (1..10_000_000).inject({})  { |hash, i| i + 1 } }
  0.660000   0.000000   0.660000 (  0.660929)

# using inject style and returning the hash
[9] pry(main)> puts Benchmark.measure { (1..10_000_000).inject({})  { |hash, i| i + 1; hash } }
  0.670000   0.000000   0.670000 (  0.674742)