class Vernier::Output::Top

def initialize(profile)
  @profile = profile
end

def output
  stack_weights = Hash.new(0)
  @profile.samples.zip(@profile.weights) do |stack_idx, weight|
    stack_weights[stack_idx] += weight
  end
  top_by_self = Hash.new(0)
  stack_weights.each do |stack_idx, weight|
    stack = @profile.stack(stack_idx)
    top_by_self[stack.leaf_frame.name] += weight
  end
  s = +""
  top_by_self.sort_by(&:last).reverse.each do |frame, samples|
    s << "#{samples}\t#{frame}\n"
  end
  s
end