Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  ms/call  ms/call  name    
 54.17      0.39     0.39 10000000     0.00     0.00  find_rank_student
 27.78      0.59     0.20        1   200.00   680.00  sort_students
  6.94      0.64     0.05 15000000     0.00     0.00  sift
  5.56      0.68     0.04    10000     0.00     0.01  heapsort
  4.17      0.71     0.03        1    30.00    30.00  generate_ranks
  1.39      0.72     0.01     1000     0.01     0.01  generate_array
  0.00      0.72     0.00        2     0.00     0.00  free_array
  0.00      0.72     0.00        1     0.00    10.00  generate_grades

			Call graph


granularity: each sample hit covers 4 byte(s) for 1.39% of 0.72 seconds

index % time    self  children    called     name
                                                 <spontaneous>
[1]    100.0    0.00    0.72                 main [1]
                0.20    0.48       1/1           sort_students [2]
                0.03    0.00       1/1           generate_ranks [6]
                0.00    0.01       1/1           generate_grades [8]
                0.00    0.00       2/2           free_array [10]
-----------------------------------------------
                0.20    0.48       1/1           main [1]
[2]     94.4    0.20    0.48       1         sort_students [2]
                0.39    0.00 10000000/10000000     find_rank_student [3]
                0.04    0.05   10000/10000       heapsort [4]
-----------------------------------------------
                0.39    0.00 10000000/10000000     sort_students [2]
[3]     54.2    0.39    0.00 10000000         find_rank_student [3]
-----------------------------------------------
                0.04    0.05   10000/10000       sort_students [2]
[4]     12.5    0.04    0.05   10000         heapsort [4]
                0.05    0.00 15000000/15000000     sift [5]
-----------------------------------------------
                             3848199             sift [5]
                0.05    0.00 15000000/15000000     heapsort [4]
[5]      6.9    0.05    0.00 15000000+3848199 sift [5]
                             3848199             sift [5]
-----------------------------------------------
                0.03    0.00       1/1           main [1]
[6]      4.2    0.03    0.00       1         generate_ranks [6]
-----------------------------------------------
                0.01    0.00    1000/1000        generate_grades [8]
[7]      1.4    0.01    0.00    1000         generate_array [7]
-----------------------------------------------
                0.00    0.01       1/1           main [1]
[8]      1.4    0.00    0.01       1         generate_grades [8]
                0.01    0.00    1000/1000        generate_array [7]
-----------------------------------------------
                0.00    0.00       2/2           main [1]
[10]     0.0    0.00    0.00       2         free_array [10]
-----------------------------------------------

Index by function name

   [3] find_rank_student       [8] generate_grades         [5] sift
  [10] free_array              [6] generate_ranks          [2] sort_students
   [7] generate_array          [4] heapsort