Add profilers and benchmark

Simple scenario to profile application

benchmarks/benchmark.rb

@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby -s
+
+# frozen_string_literal: true
+
+require_relative 'benchmark_sample'
+require 'benchmark'
+
+Benchmark.bmbm(30) do |x|
+  x.report('benchmark_sample') do
+    run_benchmark_sample
+  end
+end

benchmarks/benchmark_sample.rb

@@ -0,0 +1,55 @@
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift "#{File.dirname(__FILE__)}/../lib"
+require 'chrono_model'
+require 'rails'
+
+ActiveRecord::Base.establish_connection(adapter: 'chronomodel', database: 'chronomodel_bench')
+ActiveRecord::Base.logger = nil
+ActiveRecord::Migration.verbose = false
+
+ActiveRecord::Schema.define do
+  enable_extension :btree_gist
+
+  drop_table :foos, if_exists: true
+
+  create_table :foos, temporal: true do |t|
+    t.string :name
+    t.timestamps
+  end
+end
+
+class Foo < ActiveRecord::Base
+  include ChronoModel::TimeMachine
+end
+
+def run_benchmark_sample(iterations: 100)
+  # Create
+  iterations.times { |i| Foo.create! name: "Foo #{i}" }
+
+  foo = Foo.create! name: 'Foo'
+
+  # Update
+  iterations.times { |i| foo.update! name: "New Foo #{i}" }
+
+  # Destroy
+  iterations.times { Foo.create!.destroy! }
+
+  # Delete
+  iterations.times { Foo.create!.delete }
+
+  # Find
+  iterations.times { |i| Foo.find(i + 1) }
+
+  # Where
+  iterations.times { |i| Foo.where(id: i + 1) }
+
+  # as_of
+  iterations.times { foo.as_of(1.day.ago) }
+
+  # History
+  iterations.times { foo.history.first }
+  iterations.times { foo.history.last }
+
+  iterations.times { Foo::History.sti_name }
+end

benchmarks/profile.rb

@@ -0,0 +1,13 @@
+#!/usr/bin/env ruby -s
+
+# frozen_string_literal: true
+
+require_relative 'benchmark_sample'
+require 'ruby-prof'
+
+result = RubyProf::Profile.profile do
+  run_benchmark_sample
+end
+
+printer = RubyProf::FlatPrinter.new(result)
+printer.print($stdout, {})

benchmarks/profile_memory.rb

@@ -0,0 +1,10 @@
+#!/usr/bin/env ruby -s
+
+# frozen_string_literal: true
+
+require_relative 'benchmark_sample'
+require 'memory_profiler'
+
+MemoryProfiler.report(allow_files: 'chronomodel/lib') do
+  run_benchmark_sample
+end.pretty_print

spec/spec_helper.rb

@@ -2,6 +2,7 @@
 
 require 'simplecov'
 SimpleCov.start do
+  add_filter '/benchmarks'
   add_filter '/spec'
 end