MiqHashStruct vs OpenStruct

miq_hash_struct_perf.rb

require 'benchmark/ips'

require 'manageiq-gems-pending'
require 'miq-hash_struct'
require 'ostruct'

large_hash = (0..1000).each_with_object({}) { |i, h| h["a#{i}"] = i }
small_hash = (0..4).each_with_object({}) { |i, h| h["a#{i}"] = i }

Benchmark.ips do |x|
  x.report("MiqHashStruct.new-large") { MiqHashStruct.new(large_hash) }
  x.report("OpenStruct.new-large") { OpenStruct.new(large_hash) }
  x.report("MiqHashStruct.new-small") { MiqHashStruct.new(small_hash) }
  x.report("OpenStruct.new-small") { OpenStruct.new(small_hash) }
end

puts  "======================================================================"
large_hash_struct = MiqHashStruct.new(large_hash)
large_open_struct = OpenStruct.new(large_hash)

Benchmark.ips do |x|
  x.report("MiqHashStruct high-read") { 1000.times { large_hash_struct.a0 } }
  x.report("OpenStruct high-read") { 1000.times { large_open_struct.a0 } }
  x.report("MiqHashStruct low-read") { large_hash_struct.a0 }
  x.report("OpenStruct low_read") { large_open_struct.a0 }
end

output.txt

Warming up --------------------------------------
MiqHashStruct.new-large
                        22.198k i/100ms
OpenStruct.new-large   437.000  i/100ms
MiqHashStruct.new-small
                        96.687k i/100ms
OpenStruct.new-small    40.280k i/100ms
Calculating -------------------------------------
MiqHashStruct.new-large
                        274.544k (±23.2%) i/s -      1.310M in   5.013370s
OpenStruct.new-large      4.372k (± 4.0%) i/s -     21.850k in   5.005783s
MiqHashStruct.new-small
                          1.279M (± 4.7%) i/s -      6.478M in   5.075022s
OpenStruct.new-small    423.267k (± 9.4%) i/s -      2.095M in   5.001133s
======================================================================
Warming up --------------------------------------
MiqHashStruct high-read
                       194.000  i/100ms
OpenStruct high-read   819.000  i/100ms
MiqHashStruct low-read
                       112.146k i/100ms
 OpenStruct low_read   220.056k i/100ms
Calculating -------------------------------------
MiqHashStruct high-read
                          1.907k (± 7.3%) i/s -      9.506k in   5.013554s
OpenStruct high-read      8.319k (± 3.4%) i/s -     41.769k in   5.026756s
MiqHashStruct low-read
                          1.807M (± 6.1%) i/s -      9.084M in   5.047288s
 OpenStruct low_read      6.422M (± 6.4%) i/s -     32.128M in   5.025546s