(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)})
  ]
)