(CommandList
  children: [
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:test_description)
          op: Equal
          rhs: {(SQ <"Tests log -L performance">)}
          spids: [4]
        )
      ]
      spids: [4]
    )
    (C {(.)} {(./perf-lib.sh)})
    (C {(test_perf_default_repo)})
    (C {(test_expect_success)} {(SQ <"select a file">)} 
      {
        (SQ <"\n"> <"\tgit ls-tree HEAD | grep ^100644 |\n"> 
          <"\tsort -k 3 | head -1 | cut -f 2 >filelist\n">
        )
      }
    )
    (Assignment
      keyword: Assign_None
      pairs: [
        (assign_pair
          lhs: (LhsName name:file)
          op: Equal
          rhs: 
            {
              (CommandSubPart
                command_list: (CommandList children:[(C {(cat)} {(filelist)})])
                left_token: <Left_CommandSub "$(">
                spids: [37 41]
              )
            }
          spids: [36]
        )
      ]
      spids: [36]
    )
    (C {(export)} {(file)})
    (C {(test_perf)} {(SQ <"git rev-list --topo-order (baseline)">)} 
      {(SQ <"\n"> <"\tgit rev-list --topo-order HEAD >/dev/null\n">)}
    )
    (C {(test_perf)} {(SQ <"git log --follow (baseline for -M)">)} 
      {(SQ <"\n"> <"\tgit log --oneline --follow -- \"$file\" >/dev/null\n">)}
    )
    (C {(test_perf)} {(SQ <"git log -L (renames off)">)} 
      {(SQ <"\n"> <"\tgit log --no-renames -L 1:\"$file\" >/dev/null\n">)}
    )
    (C {(test_perf)} {(SQ <"git log -L (renames on)">)} 
      {(SQ <"\n"> <"\tgit log -M -L 1:\"$file\" >/dev/null\n">)}
    )
    (C {(test_done)})
  ]
)