message: Add "us_per_example" metrics for eager micro benchmark
diff: @@ -176,7 +176,12 @@ class MicroBenchmarks(test.Benchmark):
  self.report_benchmark(
  iters=num_iters,
  wall_time=mean_us,
  - extras={"examples_per_sec": num_iters / total_time})
  + extras={
  + "examples_per_sec":
  + float("{0:.3f}".format(num_iters / total_time)),
  + "us_per_example":
  + float("{0:.3f}".format(total_time * 1e6 / num_iters))
  + })
  def benchmark_create_np_array(self):
  func = lambda: np.array([3.0])
  