Chapter 3.2 : How to profile a code with valgrind

• 3.2.1) Profiling the code
• 3.2.2) Visualisation of the results

The execution time with the valgrind profiler is slowed down by about 30 times.
So, be careful not to use a program which has already a long execution time or
take this into account if you don't have choice (by profiling during the night for example).