class Vernier::Output::Firefox::Thread

def allocations_table
  return nil if !@allocations
  samples, weights, timestamps = @allocations.values_at(:samples, :weights, :timestamps)
  return nil if samples.size == 0
  size = samples.size
  timestamps = timestamps.map { _1 / 1_000_000.0 }
  ret = {
    "time": timestamps,
    "className": ["Object"]*size,
    "typeName": ["JSObject"]*size,
    "coarseType": ["Object"]*size,
    "weight": weights,
    "inNursery": [false] * size,
    "stack": samples,
    "length": size
  }
  ret
end