20 May 2009 09:44:20 AM

TIMER_CLOCK
  C++ version
  Demonstrate the use of the CLOCK timer.

  CLOCK is a  C++ library routine
  (defined in <ctime>)

  It returns the processor time used by the program
  since the beginning of program execution.
  Divide this by CLOCKS_PER_SEC to convert to seconds.

  CLOCK is a crude timer, and results less than
  a tenth of a second are probably not reliable.

  The number of clock ticks per second is 1000000

TEST01
  Time the RAND function by computing N values.
  For a given N, repeat the computation 5 times.

  Data vectors will be of minimum size 1
  Data vectors will be of maximum size 1048576

  CPU times are in seconds.

         N      Rep #1      Rep #2      Rep #2      Rep #4      Rep #5         Min         Ave         Max

         1     5.3e-05       5e-06       6e-06       6e-06       5e-06       5e-06     1.5e-05     5.3e-05
         2       5e-06       5e-06       5e-06       4e-06       4e-06       4e-06     4.6e-06       5e-06
         4       4e-06       6e-06       6e-06       6e-06       6e-06       4e-06     5.6e-06       6e-06
         8       6e-06       6e-06       5e-06       6e-06       6e-06       5e-06     5.8e-06       6e-06
        16       5e-06       5e-06       5e-06       5e-06       6e-06       5e-06     5.2e-06       6e-06
        32       7e-06       6e-06       7e-06       7e-06       7e-06       6e-06     6.8e-06       7e-06
        64       8e-06       7e-06       7e-06       7e-06       7e-06       7e-06     7.2e-06       8e-06
       128       1e-05     1.1e-05     1.1e-05       1e-05       1e-05       1e-05    1.04e-05     1.1e-05
       256     1.7e-05     1.5e-05     1.6e-05     1.5e-05     1.5e-05     1.5e-05    1.56e-05     1.7e-05
       512     3.6e-05     2.6e-05     2.7e-05     2.6e-05     2.9e-05     2.6e-05    2.88e-05     3.6e-05
      1024     5.8e-05     4.8e-05     4.6e-05     5.2e-05     4.9e-05     4.6e-05    5.06e-05     5.8e-05
      2048    0.000109     8.6e-05     8.5e-05     9.1e-05     8.6e-05     8.5e-05    9.14e-05    0.000109
      4096     0.00021    0.000175    0.000175    0.000164    0.000172    0.000164   0.0001792     0.00021
      8192    0.000406    0.000337    0.000323    0.000323    0.000353    0.000323   0.0003484    0.000406
     16384    0.000924     0.00065    0.000645    0.000667     0.00073    0.000645   0.0007232    0.000924
     32768    0.001624    0.001366    0.001364    0.001293    0.001677    0.001293   0.0014648    0.001677
     65536    0.003279    0.002581    0.002655    0.002798    0.002764    0.002581   0.0028154    0.003279
    131072    0.006591    0.005283    0.005156    0.006238    0.005284    0.005156   0.0057104    0.006591
    262144    0.013097    0.010425    0.010468    0.010293    0.010675    0.010293   0.0109916    0.013097
    524288     0.02655    0.021519    0.021012    0.017624    0.013577    0.013577   0.0200564     0.02655
   1048576    0.034843    0.028054    0.027193      0.0275     0.02772    0.027193    0.029062    0.034843


TIMER_CLOCK
  Normal end of execution.

20 May 2009 09:44:21 AM