(CommandList children: [ (Assignment keyword: Assign_None pairs: [ (assign_pair lhs: (LhsName name:test_description) op: Equal rhs: {(DQ ('Test diff --no-index performance'))} spids: [4] ) ] spids: [4] ) (C {(.)} {(./perf-lib.sh)}) (C {(test_perf_large_repo)}) (C {(test_checkout_worktree)}) (Assignment keyword: Assign_None pairs: [ (assign_pair lhs: (LhsName name:file1) op: Equal rhs: { (CommandSubPart command_list: (CommandList children: [ (Pipeline children: [(C {(git)} {(ls-files)}) (C {(tail)} {(-n)} {(2)}) (C {(head)} {(-1)})] negated: False ) ] ) left_token: <Left_CommandSub '$('> spids: [21 39] ) } spids: [20] ) ] spids: [20] ) (Assignment keyword: Assign_None pairs: [ (assign_pair lhs: (LhsName name:file2) op: Equal rhs: { (CommandSubPart command_list: (CommandList children: [ (Pipeline children: [(C {(git)} {(ls-files)}) (C {(tail)} {(-n)} {(1)}) (C {(head)} {(-1)})] negated: False ) ] ) left_token: <Left_CommandSub '$('> spids: [42 60] ) } spids: [41] ) ] spids: [41] ) (C {(test_expect_success)} {(DQ ('empty files, so they take no time to diff'))} { (DQ ('\n') ('\techo >') ($ VSub_Name '$file1') (' &&\n') ('\techo >') ($ VSub_Name '$file2') ('\n')) } ) (C {(test_perf)} {(DQ ('diff --no-index'))} { (DQ ('\n') ('\tgit diff --no-index ') ($ VSub_Name '$file1') (' ') ($ VSub_Name '$file2') (' >/dev/null\n') ) } ) (C {(test_done)}) ] )