any parallelisation and without the "if", the time of execution corresponds
to one tenth of a second. This time is not really representative because
the system has not really the time to calculate it.
Without parallelisation but with the "if", the time of calculation amounts to 54 seconds. The enormous ratio (about 540) shows how important it is to avoid conditions of operating while programming.
With the "if" and the parallelisation, the time of calculation decreases with the number a processors :
The increase of the speed of calculation in function of the number of processors used is very impressive even with few processors. The improvements are no more significative with more than 3 processors. The speed which is won by the use of more processors is lost by the quantity of message passing from one processor to another.
conclude, it should be underlined that it is really important to consider
the possible parallelisation of the code while developping it. An optimised
code for super-scalar computation could have been more easily parallelised
than Jadim. Here the benefits were important (a 20% of time of calculation
benefit) but not as impressive as it could be. The benefit of time of calculation
is nowadays really important, that's why a well-optimised code can have
more success, allowing to use bigger models for a given computation time.