Add Optcarrot Ractor benchmark

This is a copy of the Optcarrot benchmark from benchmarks/optcarrot, but
modified to be compatible with multiple Ractors

Author: luke-gruber

benchmarks-ractor/optcarrot/benchmark.rb

@@ -0,0 +1,50 @@
+require_relative '../../harness/loader'
+require_relative "../../benchmarks/optcarrot/lib/optcarrot"
+
+ROM_PATH = File.expand_path("../../benchmarks/optcarrot/examples/Lan_Master.nes", __dir__).freeze
+# deep freeze all the constants
+
+# rubocop:disable Lint/ShadowingOuterLocalVariable, Style/Semicolon
+Optcarrot::Config::DEFAULT_OPTIONS.each {|k, v| k.freeze; v.freeze }.freeze
+Optcarrot::Config::OPTIONS.each do |k, v|
+  k.freeze
+  v.each do |k, v|
+    k.freeze
+    v.each do |k, v|
+      k.freeze
+      if v.is_a?(Array)
+        v.each {|v| v.freeze }
+      end
+      v.freeze
+    end.freeze
+  end.freeze
+end.freeze
+Optcarrot::Driver::DRIVER_DB.each do |k, v|
+  k.freeze
+  v.each {|k, v| k.freeze; v.freeze }.freeze
+end.freeze
+Optcarrot::Audio::PACK_FORMAT.each {|k, v| k.freeze; v.freeze }.freeze
+Optcarrot::APU::Pulse::WAVE_FORM.each {|a| a.freeze }.freeze
+Optcarrot::APU::Triangle::WAVE_FORM.freeze
+Optcarrot::APU::FRAME_CLOCKS.freeze
+Optcarrot::APU::OSCILLATOR_CLOCKS.each {|a| a.freeze }.freeze
+Optcarrot::APU::LengthCounter::LUT.freeze
+Optcarrot::APU::Noise::LUT.freeze
+Optcarrot::APU::Noise::NEXT_BITS_1.each {|a| a.freeze }.freeze
+Optcarrot::APU::Noise::NEXT_BITS_6.each {|a| a.freeze }.freeze
+Optcarrot::APU::DMC::LUT.freeze
+Optcarrot::PPU::DUMMY_FRAME.freeze
+Optcarrot::PPU::BOOT_FRAME.freeze
+Optcarrot::PPU::SP_PIXEL_POSITIONS.each {|k, v| k.freeze; v.freeze }.freeze
+Optcarrot::PPU::TILE_LUT.each {|a| a.each {|a| a.each {|a| a.freeze }.freeze }.freeze }.freeze
+Optcarrot::PPU::NMT_TABLE.each {|k, v| k.freeze; v.freeze }.freeze
+Optcarrot::CPU::DISPATCH.each {|a| a.freeze }.freeze
+Optcarrot::ROM::MAPPER_DB.freeze
+# rubocop:enable Style/Semicolon
+
+# rubocop:disable Style/MultilineBlockChain
+
+run_benchmark(10) do
+  nes = Optcarrot::NES.new(["-b", "--no-print-video-checksum", ROM_PATH])
+  200.times { nes.step }
+end