Add benchmarking script for metric types
user
```ruby
require 'statsd-instrument'
require 'benchmark/ips'

def helperFunction()
    a = 10
    a += a
    a -= a
    a *= a
end

Benchmark.ips do |bench|
  bench.report("increment metric benchmark") do
    StatsD.increment('GoogleBase.insert', 10)
  end

  bench.report("measure metric benchmark") do
    StatsD.measure('helperFunction') do
        helperFunction()
    end
  end

  bench.report("gauge metric benchmark") do
    StatsD.gauge('GoogleBase.insert', 12)
  end

  bench.report("set metric benchmark") do
    StatsD.set('GoogleBase.customers', "12345", sample_rate: 1.0)
  end

  bench.report("event metric benchmark") do
    StatsD.event('Event Title', "12345")
  end

  bench.report("service check metric benchmark") do
    StatsD.service_check('shipit.redis_connection', 'ok')
  end

end
```
assistant