Add bmethod benchmark

Author: tekknolagi

benchmarks.yml

@@ -120,6 +120,10 @@ send_rubyfunc_block:
   desc: send_rubyfunc_block just calls a known Ruby function with a block many, many times.
   category: micro
   single_file: true
+send_bmethod:
+  desc: send_bmethod just calls a known Ruby bmethod many, many times.
+  category: micro
+  single_file: true
 fib:
   desc: Fib is a simple exponential-time recursive Fibonacci number generator.
   category: micro

benchmarks/send_bmethod.rb

@@ -0,0 +1,11 @@
+require_relative '../harness/loader'
+
+define_method(:zero) { :b }
+define_method(:one) { |arg| arg }
+
+run_benchmark(500) do
+  2_000_000.times do |i|
+    zero
+    one 123
+  end
+end