(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:test_description)
          op: assign_op.Equal
          rhs: {(DQ <'Tests diff generation performance'>)}
          spids: [4]
        )
      ]
    )
    (C {<.>} {<'./perf-lib.sh'>})
    (C {<test_perf_default_repo>})
    (C {<test_perf>} {(SQ <'log -3000 (baseline)'>)} {(SQ <'\n'> <'\tgit log -3000 >/dev/null\n'>)})
    (C {<test_perf>} {(SQ <'log --raw -3000 (tree-only)'>)} 
      {(SQ <'\n'> <'\tgit log --raw -3000 >/dev/null\n'>)}
    )
    (C {<test_perf>} {(SQ <'log -p -3000 (Myers)'>)} {(SQ <'\n'> <'\tgit log -p -3000 >/dev/null\n'>)})
    (C {<test_perf>} {(SQ <'log -p -3000 --histogram'>)} 
      {(SQ <'\n'> <'\tgit log -p -3000 --histogram >/dev/null\n'>)}
    )
    (C {<test_perf>} {(SQ <'log -p -3000 --patience'>)} 
      {(SQ <'\n'> <'\tgit log -p -3000 --patience >/dev/null\n'>)}
    )
    (C {<test_done>})
  ]
)