(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(DQ ('Tests history walking performance'))}
          spids: [4]
        )
      ]
      spids: [4]
    )
    (C {(.)} {(./perf-lib.sh)})
    (C {(test_perf_default_repo)})
    (C {(test_perf)} {(SQ <'rev-list --all'>)} {(SQ <'\n'> <'\tgit rev-list --all >/dev/null\n'>)})
    (C {(test_perf)} {(SQ <'rev-list --all --objects'>)} 
      {(SQ <'\n'> <'\tgit rev-list --all --objects >/dev/null\n'>)}
    )
    (C {(test_expect_success)} {(SQ <'create new unreferenced commit'>)} 
      {(SQ <'\n'> <'\tcommit=$(git commit-tree HEAD^{tree} -p HEAD)\n'>)}
    )
    (C {(test_perf)} {(SQ <'rev-list $commit --not --all'>)} 
      {(SQ <'\n'> <'\tgit rev-list $commit --not --all >/dev/null\n'>)}
    )
    (C {(test_perf)} {(SQ <'rev-list --objects $commit --not --all'>)} 
      {(SQ <'\n'> <'\tgit rev-list --objects $commit --not --all >/dev/null\n'>)}
    )
    (C {(test_done)})
  ]
)