Gemfile in d_heap-0.4.0 vs Gemfile in d_heap-0.5.0

@@ -8,5 +8,9 @@
 gem "pry"
 gem "rake", "~> 13.0"
 gem "rake-compiler"
 gem "rspec", "~> 3.10"
 gem "rubocop", "~> 1.0"
+
+gem "perf"
+gem "priority_queue_cxx"
+gem "stackprof"