You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test39.m
    path of file: ./repos/SuiteSparse/GraphBLAS/Test/unused
    
    the code of the file until where you have to start completion: function test39(use_ssget)
%TEST39 performance test for GrB_transpose


    
function test39(use_ssget)
%TEST39 performance test for GrB_transpose

% SuiteSparse:GraphBLAS, Timothy A. Davis, (c) 2017-2023, All Rights Reserved.
% SPDX-License-Identifier: Apache-2.0

fprintf ('\ntest39 performance tests : GrB_transpose \n') ;

if (nargin < 1)
    use_ssget = true ;
end

[save save_chunk] = nthreads_get ;
chunk = 4096 ;
nthreads = feature_numcores ;
nthreads_set (nthreads, chunk) ;

rng ('default') ;

if (use_ssget)
    try
        Prob = ssget (939)
        A = Prob.A ;
    catch
        use_ssget = false ;
    end