code: def register_main(subparser) -> "None":
      parser = subparser.add_parser(
          "visualize",
          description="Visualize benchmark results",
          help="Graphically compare one or more benchmark results against a datum",
      )
      parser.add_argument("baseline", help="baseline benchmark results")
      parser.add_argument(
          "runs",
          nargs="+",
          help="benchmarks to compare against baseline",
      )
      parser.add_argument(
          "--metric",
          choices=["mean", "median", "stdev", "max_memory"],
          default="mean",
      )
      parser.add_argument(
          "--head",
          type=int,
          help="number of most significant results to take",
      )
      parser.add_argument(
          "--abs", action="store_true", help="plot absolute differences"
      )
      parser.set_defaults(main=main)
  
file_path: hail/benchmark/python/benchmark_hail/visualize.py
imports: import matplotlib.pyplot
  import pandas
  from collections import defaultdict
  from .compare import load_file
  from typing import List, Optional
label_desc: Use image node_id 4 for calling a global function with example usage: register_main(subparser) without return types