Benchmarking merging keyword arguments

benchmark-merge.rb

gem "benchmark-ips"
require 'benchmark/ips'

# This is all about merging {config} or not.

# Never merge. Fastest.
def container_fast(activity, bla: "default")
  {
    activity: activity,
    bla: bla,
  }
end

# Always merge {config}. Around 1/4 slower than not merging.
def container(activity, bla: "default", **config)
  {
    activity: activity,
    bla: bla,
    **config
  }
end

# Only merge if config contains tuples. Very slow.
def container_with_if(activity, bla: "default", **config)
  hsh = {
    activity: activity,
    bla: bla,

  }
  hsh.merge(config) if config.any?
end

Benchmark.ips do |x|

  x.report("new container") { container(nil) }
  x.report("new container with hsh") { container(nil, key: "something") }
  x.report("new container with if") { container_with_if(nil, key: "something") }
  x.report("old container") { container_fast(nil) }

end