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require 'benchmark/ips'
small_hash = { :key => true, :more_key => true, :other_key => true }
large_hash = (1...100).inject({}) { |hash, key| hash["key_#{key}"] = true; hash }
Benchmark.ips do |x|
x.report('keys.each with small hash') do
small_hash.keys.each { |value| value == true }
end
x.report('each_key with small hash') do
small_hash.each_key { |value| value == true }
end
x.report('keys.each with large hash') do
large_hash.keys.each { |value| value == true }
end
x.report('each_key with large hash') do
large_hash.each_key { |value| value == true }
end
end
__END__
Calculating -------------------------------------
keys.each with small hash
105.581k i/100ms
each_key with small hash
112.045k i/100ms
keys.each with large hash
7.625k i/100ms
each_key with large hash
6.959k i/100ms
-------------------------------------------------
keys.each with small hash
2.953M (± 3.8%) i/s - 14.781M
each_key with small hash
2.917M (± 4.0%) i/s - 14.678M
keys.each with large hash
79.349k (± 2.5%) i/s - 396.500k
each_key with large hash
72.080k (± 2.1%) i/s - 361.868k
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