prelude: |
  h = {a: 1}
  def kw(a: 1) a end
  def kws(**kw) kw end
benchmark:
  kw_to_kw: "kw(a: 1)"
  kw_splat_to_kw: "kw(**h)"
  kw_to_kw_splat: "kws(a: 1)"
  kw_splat_to_kw_splat: "kws(**h)"
  kw_and_splat_to_kw: "kw(a: 1, **h)"
  kw_splats_to_kw: "kw(**h, **h)"
  kw_and_splat_to_kw_splat: "kws(a: 1, **h)"
  kw_splats_to_kw_splat: "kws(**h, **h)"