Add parse.rb for profiling

Author: soutaro

parse.rb

@@ -0,0 +1,23 @@
+# require "bundler/setup"
+
+require 'rbs'
+# require 'benchmark/ips'
+
+if (opt = ARGV[0]) == "--wait"
+  ARGV.shift
+  puts "⏯️ Waiting for enter to continue at #{Process.pid}..."
+  STDIN.gets
+end
+
+file = ARGV.shift
+sig = File.read(file)
+
+puts "#{file} -- #{sig.bytesize} bytes"
+
+started_at = Time.now
+secs = 3
+
+loop do
+  RBS::Parser.parse_signature(sig)
+  break if (Time.now - started_at) > secs
+end