Benchmark different way to concat strings in Ruby

string_bench.rb

require 'benchmark/ips'

puts "Ruby #{RUBY_VERSION} at #{Time.now}"
puts

firstname = 'soundarapandian'
middlename = 'rathinasamy'
lastname = 22

Benchmark.ips do |x|
    
  x.report("String concatenation") do |times|
    String.new << 'Mr. ' << firstname << middlename << lastname.to_s << ' aka soundar'
  end

  x.report("String interpolate") do |times|
    String.new << "Mr. #{firstname} #{middlename} #{lastname} aka soundar"
  end

  x.report("Sprintf") do |times|
    String.new << sprintf("Mr. %s %s %d aka soundar", firstname, middlename, lastname)
  end

  x.compare!
end