class Airbrake::TDigest

def as_bytes
  # compression as defined by Java implementation
  size = @centroids.size
  output = [VERBOSE_ENCODING, compression, size]
  output += @centroids.each_value.map(&:mean)
  output += @centroids.each_value.map(&:n)
  output.pack("NGNG#{size}N#{size}")
end