Timing

• The simple way to check wall-clock time:

  date; my_program; date

• Checking CPU time consumed by the process:

  time my_program

• Timing inside the code, by using gettimeofday() before and after some interesting code chunk, and calculating the difference.
• Better perform the timing over many runs of the program/code-block, and print the average.
• of even better, generate a log file and print a graph using gnuplot or a spreadsheet.

Originally written by guy keren