class Liquid::Assign

def assign_score_of(val)
  if val.instance_of?(String)
    val.bytesize
  elsif val.instance_of?(Array)
    sum = 1
    # Uses #each to avoid extra allocations.
    val.each { |child| sum += assign_score_of(child) }
    sum
  elsif val.instance_of?(Hash)
    sum = 1
    val.each do |key, entry_value|
      sum += assign_score_of(key)
      sum += assign_score_of(entry_value)
    end
    sum
  else
    1
  end
end