Flat profile:

Each sample counts as 0.01 seconds.
  %   cumulative   self              self     total           
 time   seconds   seconds    calls  us/call  us/call  name    
 99.08      7.53     7.53    20000   376.50   376.50  FFT
  0.92      7.60     0.07    10000     7.00   760.00  example1

			Call graph


granularity: each sample hit covers 4 byte(s) for 0.13% of 7.60 seconds

index % time    self  children    called     name
                0.07    7.53   10000/10000       main [2]
[1]    100.0    0.07    7.53   10000         example1 [1]
                7.53    0.00   20000/20000       FFT [3]
-----------------------------------------------
                                                 <spontaneous>
[2]    100.0    0.00    7.60                 main [2]
                0.07    7.53   10000/10000       example1 [1]
-----------------------------------------------
                7.53    0.00   20000/20000       example1 [1]
[3]     99.1    7.53    0.00   20000         FFT [3]
-----------------------------------------------

Index by function name

   [3] FFT                     [1] example1