[+] add cache_attribute_values benchmark

Author: skcc321

perf/benchmark_field_cache.rb perf/benchmark_cache_attribute_values.rbperf/benchmark_field_cache.rb renamed to perf/benchmark_cache_attribute_values.rb

@@ -190,6 +190,9 @@ def compare_results(current_file, master_file)
   # Just run benchmark on master
   eval(BENCHMARK_SCRIPT)
 else
+  # Get repository root
+  repo_root = File.expand_path('..', __dir__)
+
   # Create temp script
   temp_script = Tempfile.new(['benchmark', '.rb'])
   temp_script.write(BENCHMARK_SCRIPT)
@@ -200,15 +203,15 @@ def compare_results(current_file, master_file)
   current_output = Tempfile.new(['benchmark_current', '.txt'])
   current_output.close
 
-  system("cd #{__dir__} && ruby #{temp_script.path} > #{current_output.path} 2>&1", exception: true)
+  system("cd #{repo_root} && ruby #{temp_script.path} > #{current_output.path} 2>&1", exception: true)
 
   # Switch to master and run
   puts "\nSwitching to master branch..."
   master_output = Tempfile.new(['benchmark_master', '.txt'])
   master_output.close
 
   system("git checkout master -q", exception: true)
-  system("cd #{__dir__} && ruby #{temp_script.path} > #{master_output.path} 2>&1", exception: true)
+  system("cd #{repo_root} && ruby #{temp_script.path} > #{master_output.path} 2>&1", exception: true)
 
   # Switch back to original branch
   system("git checkout #{ORIGINAL_BRANCH} -q", exception: true)