Almost all tests passing, except profiler

Rakefile

@@ -53,6 +53,21 @@ task :test do
     Rake::Task['integration_test'].reenable
     Rake::Task['integration_test'].invoke
   end
+
+  if RUBY_ENGINE == 'ruby'
+    Rake::Task['test_compile'].invoke
+  end
+end
+
+task :test_compile do
+  ENV['LIQUID_COMPILE'] = '1'
+  ENV['LIQUID_PARSER_MODE'] = 'lax'
+  Rake::Task['integration_test'].reenable
+  Rake::Task['integration_test'].invoke
+
+  ENV['LIQUID_PARSER_MODE'] = 'strict'
+  Rake::Task['integration_test'].reenable
+  Rake::Task['integration_test'].invoke
 end
 
 task(gem: :build)

lib/liquid/compile.rb

@@ -0,0 +1,67 @@
+# frozen_string_literal: true
+
+require 'pry'
+
+module Liquid
+  class BlockBody
+    def render_to_output_buffer(context, output)
+      ruby = +"->(__context, __output, __nodes) {\n"
+      compile(ruby)
+      ruby << "\n}"
+
+      nodes = nodelist.each_with_object({}) do |node, hash|
+        hash[node.object_id] = node
+      end
+
+      RubyVM::InstructionSequence
+          .compile(ruby)
+          .eval
+          .call(context, output, nodes)
+
+      output
+    end
+
+    def compile(ruby)
+      ruby << "__context.resource_limits.increment_render_score(#{nodelist.length})\n"
+      ruby << "catch(:__interrupt) do\n"
+      nodelist.each do |node|
+        if node.instance_of?(String)
+          ruby << "__output << #{node.inspect}\n"
+        else
+          ruby << "begin\n"
+          if node.line_number.is_a?(Integer)
+            ruby << "__line_number = #{node.line_number}\n"
+          else
+            ruby << "__line_number = nil\n"
+          end
+          ruby << "__is_blank = #{!node.instance_of?(Variable) && node.blank?}\n"
+          ruby << "__node = __nodes[#{node.object_id}]\n"
+          if node.respond_to?(:compile)
+            node.compile(ruby)
+          else
+            ruby << "__node.render_to_output_buffer(__context, __output)\n"
+          end
+          ruby << <<~RUBY
+            rescue => __exc
+              case __exc
+              when Liquid::MemoryError
+                raise
+              when Liquid::UndefinedVariable, Liquid::UndefinedDropMethod, Liquid::UndefinedFilter
+                __context.handle_error(__exc, __line_number)
+              else
+                __error_message = __context.handle_error(__exc, __line_number)
+                unless __is_blank
+                  __output << __error_message
+                end
+              end
+            end
+
+            throw :__interrupt if __context.interrupt?
+          RUBY
+        end
+        ruby << "__context.resource_limits.increment_write_score(__output)\n"
+      end
+      ruby << "end\n"
+    end
+  end
+end

performance/profile.rb

@@ -3,6 +3,16 @@
 require 'stackprof'
 require_relative 'theme_runner'
 
+if ENV['LIQUID_C'] == '1'
+  puts "-- LIQUID C"
+  require 'liquid/c'
+end
+
+if ENV['LIQUID_COMPILE'] == '1'
+  puts "-- COMPILED"
+  require 'liquid/compile'
+end
+
 Liquid::Template.error_mode = ARGV.first.to_sym if ARGV.first
 profiler = ThemeRunner.new
 profiler.run

test/test_helper.rb

@@ -20,6 +20,11 @@ if ENV['LIQUID_C'] == '1'
   require 'liquid/c'
 end
 
+if ENV['LIQUID_COMPILE'] == '1'
+  puts "-- COMPILED"
+  require 'liquid/compile'
+end
+
 if Minitest.const_defined?('Test')
   # We're on Minitest 5+. Nothing to do here.
 else