prelude: |
  @a = [1].freeze
  @ea = [].freeze
  @kw = {y: 1}.freeze
  @b = lambda{}
  extend(Module.new{def arg_splat(x=0, y: 0) end})
  extend(Module.new{def arg_splat_block(x=0, y: 0) end})
  extend(Module.new{def splat_kw_splat(x=0, y: 0) end})
  extend(Module.new{def splat_kw_splat_block(x=0, y: 0) end})
  extend(Module.new{def splat_kw(x=0, y: 0) end})
  extend(Module.new{def splat_kw_block(x=0, y: 0) end})

  extend(Module.new{def arg_splat; super(1, *@ea) end})
  extend(Module.new{def arg_splat_block; super(1, *@ea, &@b) end})
  extend(Module.new{def splat_kw_splat; super(*@a, **@kw) end})
  extend(Module.new{def splat_kw_splat_block; super(*@a, **@kw, &@b) end})
  extend(Module.new{def splat_kw; super(*@a, y: 1) end})
  extend(Module.new{def splat_kw_block; super(*@a, y: 1, &@b) end})
benchmark:
  arg_splat: "arg_splat"
  arg_splat_block: "arg_splat_block"
  splat_kw_splat: "splat_kw_splat"
  splat_kw_splat_block: "splat_kw_splat_block"
  splat_kw: "splat_kw"
  splat_kw_block: "splat_kw_block"