You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: simple.rb
    path of file: ./repos/elasticsearch-ruby/profile/benchmarking
    
    the code of the file until where you have to start completion: # Licensed to Elasticsearch B.V. under one or more contributor
# license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright
# ownership. Elasticsearch B.V. licenses this file to you under
# the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/lic
    
      def create_index(opts = {})
        results = []
        action_iterations = 10

        warmup_repetitions.times do
          client.indices.create(index: "benchmarking-#{Time.now.to_f}")
        end

        duration = with_cleanup do
          Benchmark.realtime do
            results = measured_repetitions.times.collect do |i|
              index_names = action_iterations.times.collect { |j| (measured_repetitions*i) + j }
              Benchmark.realtime do
                action_iterations.times do |j|
                  client.indices.create(index: "benchmarking-#{index_names[j]}")
                end
              end
            end
          end
        end

        options = { duration: duration,
                    operation: __method__,
                    action_iterations: action_iterations }
        index_results!(results, options)
      end