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#!/usr/bin/env ruby
#$: << File.expand_path('../../lib', __FILE__)
require 'benchmark'
require 'concurrent'
n = 500_000
StructPair = Struct.new(:left, :right)
SafePair = Concurrent::MutableStruct.new(:left, :right)
FinalPair = Concurrent::SettableStruct.new(:left, :right)
ImmutablePair = Concurrent::ImmutableStruct.new(:left, :right)
array_pair = [true, false].freeze
struct_pair = StructPair.new(true, false)
safe_pair = SafePair.new(true, false)
final_pair = FinalPair.new(true, false)
immutable = ImmutablePair.new(true, false)
puts "Object creation...\n"
Benchmark.bmbm do |x|
x.report('create frozen array') { n.times{ [true, false].freeze } }
x.report('create frozen struct') { n.times{ StructPair.new(true, false).freeze } }
x.report('create mutable struct') { n.times{ SafePair.new(true, false) } }
x.report('create settable struct') { n.times{ FinalPair.new(true, false) } }
x.report('create immutable struct') { n.times{ ImmutablePair.new(true, false) } }
end
puts "\n"
puts "Object access...\n"
Benchmark.bmbm do |x|
x.report('read from frozen array') { n.times{ array_pair.last } }
x.report('read from frozen struct') { n.times{ struct_pair.right } }
x.report('read from mutable struct') { n.times{ safe_pair.right } }
x.report('read from settable struct') { n.times{ final_pair.right } }
x.report('read from immutable struct') { n.times{ immutable.right } }
end
puts "\n"
puts "Enumeration...\n"
Benchmark.bmbm do |x|
x.report('iterate over frozen array') { n.times{ array_pair.each{ nil } } }
x.report('iterate over frozen struct') { n.times{ struct_pair.each{ nil } } }
x.report('iterate over mutable struct') { n.times{ safe_pair.each{ nil } } }
x.report('iterate over settable struct') { n.times{ final_pair.each{ nil } } }
x.report('iterate over immutable struct') { n.times{ immutable.each{ nil } } }
end
__END__
Object creation...
Rehearsal -----------------------------------------------------------
create frozen array 0.090000 0.000000 0.090000 ( 0.091262)
create frozen struct 0.180000 0.000000 0.180000 ( 0.179993)
create mutable struct 2.030000 0.000000 2.030000 ( 2.052071)
create settable struct 2.070000 0.000000 2.070000 ( 2.080022)
create immutable struct 0.710000 0.000000 0.710000 ( 0.716877)
-------------------------------------------------- total: 5.080000sec
user system total real
create frozen array 0.100000 0.000000 0.100000 ( 0.097776)
create frozen struct 0.190000 0.000000 0.190000 ( 0.186287)
create mutable struct 2.020000 0.010000 2.030000 ( 2.032391)
create settable struct 2.030000 0.000000 2.030000 ( 2.031631)
create immutable struct 0.690000 0.000000 0.690000 ( 0.695010)
Object access...
Rehearsal --------------------------------------------------------------
read from frozen array 0.060000 0.000000 0.060000 ( 0.060430)
read from frozen struct 0.060000 0.000000 0.060000 ( 0.058978)
read from mutable struct 0.440000 0.000000 0.440000 ( 0.454071)
read from settable struct 0.460000 0.000000 0.460000 ( 0.457699)
read from immutable struct 0.120000 0.000000 0.120000 ( 0.126701)
----------------------------------------------------- total: 1.140000sec
user system total real
read from frozen array 0.060000 0.000000 0.060000 ( 0.063006)
read from frozen struct 0.060000 0.000000 0.060000 ( 0.094203)
read from mutable struct 0.420000 0.000000 0.420000 ( 0.468304)
read from settable struct 0.410000 0.000000 0.410000 ( 0.452446)
read from immutable struct 0.110000 0.010000 0.120000 ( 0.127030)
Enumeration...
Rehearsal -----------------------------------------------------------------
iterate over frozen array 0.170000 0.000000 0.170000 ( 0.176898)
iterate over frozen struct 0.160000 0.000000 0.160000 ( 0.160786)
iterate over mutable struct 1.520000 0.000000 1.520000 ( 1.627013)
iterate over settable struct 1.500000 0.010000 1.510000 ( 1.525163)
iterate over immutable struct 0.990000 0.000000 0.990000 ( 1.006201)
-------------------------------------------------------- total: 4.350000sec
user system total real
iterate over frozen array 0.170000 0.000000 0.170000 ( 0.167927)
iterate over frozen struct 0.150000 0.000000 0.150000 ( 0.157328)
iterate over mutable struct 1.450000 0.000000 1.450000 ( 1.462654)
iterate over settable struct 1.460000 0.000000 1.460000 ( 1.480270)
iterate over immutable struct 0.940000 0.010000 0.950000 ( 0.955633)
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