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tiagoamaro/hash_with_indifferent_access_benchmark.rb

Last active September 2, 2024 15:36
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ActiveSupport's HashWithIndifferentAccess access benchmark vs common Ruby Hash
Raw
hash_with_indifferent_access_benchmark.rb
require 'active_support/all'
require 'benchmark/ips'
Benchmark.ips do |x|
x.config(time: 5, warmup: 2)
@hash_with_indifferent_access = ActiveSupport::HashWithIndifferentAccess.new(a: 1)
@hash = Hash[a: 2]
x.report("Common Hash access") do
@hash.fetch :a
end
x.report("HashWithIndifferentAccess#fetch Symbol") do
@hash_with_indifferent_access.fetch :a
end
x.report("HashWithIndifferentAccess#fetch String") do
@hash_with_indifferent_access.fetch 'a'
end
x.report("HashWithIndifferentAccess #[] Symbol") do
@hash_with_indifferent_access[:a]
end
x.report("HashWithIndifferentAccess #[] String") do
@hash_with_indifferent_access['a']
end
# Compare the iterations per second of the various reports!
x.compare!
end
# Results
# ▶ ruby hash_with_indifferent_access_benchmark.rb
# Calculating -------------------------------------
# Common Hash access 48.481k i/100ms
# HashWithIndifferentAccess#fetch Symbol
# 39.126k i/100ms
# HashWithIndifferentAccess#fetch String
# 37.910k i/100ms
# HashWithIndifferentAccess #[] Symbol
# 33.985k i/100ms
# HashWithIndifferentAccess #[] String
# 42.670k i/100ms
# -------------------------------------------------
# Common Hash access 5.650M (±10.1%) i/s - 27.877M
# HashWithIndifferentAccess#fetch Symbol
# 1.953M (± 8.5%) i/s - 9.703M
# HashWithIndifferentAccess#fetch String
# 1.985M (± 7.8%) i/s - 9.857M
# HashWithIndifferentAccess #[] Symbol
# 1.410M (± 7.2%) i/s - 7.035M
# HashWithIndifferentAccess #[] String
# 3.704M (±10.0%) i/s - 18.305M
#
# Comparison:
# Common Hash access: 5649613.0 i/s
# HashWithIndifferentAccess #[] String: 3703535.0 i/s - 1.53x slower
# HashWithIndifferentAccess#fetch String: 1984536.9 i/s - 2.85x slower
# HashWithIndifferentAccess#fetch Symbol: 1953020.8 i/s - 2.89x slower
# HashWithIndifferentAccess #[] Symbol: 1410364.2 i/s - 4.01x slower
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