DEV: Remove ruby 1.9/2.0 benchmark (#24862)

script/measure.rb

@@ -1,168 +0,0 @@
-# frozen_string_literal: true
-
-# using this script to try figure out why Ruby 2 is slower than 1.9
-require "flamegraph"
-
-Flamegraph.generate("test.html", fidelity: 2) do
-  require File.expand_path("../../config/environment", __FILE__)
-end
-exit
-
-require "memory_profiler"
-
-result = MemoryProfiler.report { require File.expand_path("../../config/environment", __FILE__) }
-result.pretty_print
-
-exit
-
-require "benchmark"
-
-def profile_allocations(name)
-  GC.disable
-  initial_size = ObjectSpace.count_objects
-  yield
-  changes = ObjectSpace.count_objects
-  changes.each { |k, _| changes[k] -= initial_size[k] }
-  puts "#{name} changes"
-  changes
-    .sort { |a, b| b[1] <=> a[1] }
-    .each do |a, b|
-      next if b <= 0
-      # 1 extra hash for tracking
-      puts "#{a} #{a == :T_HASH ? b - 1 : b}"
-    end
-  GC.enable
-end
-
-def profile(name, &block)
-  puts "Profiling all object allocation for #{name}"
-  GC.start
-  GC.disable
-
-  items = []
-  objs = []
-
-  ObjectSpace.trace_object_allocations do
-    block.call
-
-    ObjectSpace.each_object { |o| objs << o }
-
-    objs.each do |o|
-      g = ObjectSpace.allocation_generation(o)
-      if g
-        l = ObjectSpace.allocation_sourceline(o)
-        f = ObjectSpace.allocation_sourcefile(o)
-        c = ObjectSpace.allocation_class_path(o)
-        m = ObjectSpace.allocation_method_id(o)
-        items << "Allocated #{c} in #{m} #{f}:#{l}"
-      end
-    end
-  end
-
-  items
-    .group_by { |x| x }
-    .sort { |a, b| b[1].length <=> a[1].length }
-    .each { |row, group| puts "#{row} x #{group.length}" }
-
-  GC.enable
-  profile_allocations(name, &block)
-end
-
-def stuff
-  u = User.first
-  r = TopicQuery.new(u, {}).list_latest
-  r.topics.to_a
-end
-
-stuff
-profile_allocations "stuff" do
-  stuff
-end
-
-# Benchmark.bmbm do |x|
-#
-#   x.report("find") do
-#     100.times{stuff}
-#   end
-#
-# end
-#
-#   x.report("grab 10 users id") do
-#     100.times{User.limit(10).select(:id).to_a}
-#   end
-#
-#   x.report("grab 10 users") do
-#     100.times{User.limit(10).to_a}
-#   end
-#
-# profile("topic query") do
-# r = TopicQuery.new(u, {}).list_latest
-# r.topics.to_a
-# end
-
-#
-# RubyProf.start
-#
-# r = TopicQuery.new(u, {}).list_latest
-# r.topics.to_a
-#
-# result = RubyProf.stop
-# printer = RubyProf::GraphPrinter.new(result)
-# # printer = RubyProf::FlatPrinter.new(result)
-# printer.print(STDOUT, :min_percent => 2)
-#
-# exit
-#
-# # User.limit(10).to_a
-# User.limit(10).select(:created_at).to_a
-#
-# profile("limit 10") do
-#   User.limit(10).select(:created_at).to_a
-# end
-#
-# exit
-# User.limit(10).to_a
-# exit
-#
-# User.select('id, 2 bob').first
-# Benchmark.bmbm do |x|
-#
-#   x.report("find") do
-#     100.times{User.find(1)}
-#   end
-#
-#   x.report("grab 10 users created_at") do
-#     100.times{User.limit(10).select(:created_at).to_a}
-#   end
-#
-#   x.report("grab 10 users id") do
-#     100.times{User.limit(10).select(:id).to_a}
-#   end
-#
-#   x.report("grab 10 users") do
-#     100.times{User.limit(10).to_a}
-#   end
-#
-#
-#   x.report("pg direct grab 10 users") do
-#     100.times do
-#       r = ActiveRecord::Base.connection.raw_connection.async_exec("select * from users limit 10")
-#       r.fields.each_with_index do |f,i|
-#         r.ftype(i)
-#       end
-#       r.each_row do |x|
-#         x
-#       end
-#     end
-#   end
-#
-# end
-#
-
-# profile("find") do
-#   User.find(1)
-# end
-# puts
-# profile("where") do
-#   User.where(id: 1).first
-# end