add benchmark script

Author: exterm

Gemfile

@@ -13,3 +13,4 @@ group :memcheck do
 end
 gem "rbs", platform: %i[mri mswin mingw x64_mingw]
 gem "parser"
+gem "benchmark-ips"

Gemfile.lock

@@ -8,6 +8,7 @@ GEM
   specs:
     abbrev (0.1.2)
     ast (2.4.2)
+    benchmark-ips (2.13.0)
     ffi (1.16.3)
     mini_portile2 (2.8.5)
     nokogiri (1.16.0)
@@ -35,6 +36,7 @@ PLATFORMS
   universal-java-20
 
 DEPENDENCIES
+  benchmark-ips
   ffi
   parser
   prism!

bin/bench

@@ -0,0 +1,17 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "bundler/setup"
+require "benchmark/ips"
+require "parser/current"
+require "prism"
+
+
+filepath = ARGV.fetch(0) { File.expand_path("../lib/prism/translation/parser/compiler.rb", __dir__) }
+
+Benchmark.ips do |x|
+  x.report("Parser::CurrentRuby") { Parser::CurrentRuby.parse_file(filepath) }
+  x.report("Parser::Prism") { Prism.parse_file(filepath) }
+  x.report("Prism::Translation::Parser") { Prism::Translation::Parser.parse_file(filepath) }
+  x.compare!
+end