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If you have a big task to do that needs a lot of computation, but can be split up in several
independent smaller tasks, you can reduce the overall execution time by spreading the work
to several CPUs or cores.
On a Linux/Unix system this can be done using fork(). On Windows, fork() is emulated by perl
and it might not fully work the same way.
Using fork to spread load to multiple cores
While a lot of people recommend using advanced OOP systems for Perl
such as Moose or Moo, there are many applications that use the
classic OOP system of Perl. If you want or need to understand such
applications, you'd better make yourself familiar with the classic OOP
system of Perl.
Besides, both Moose and Moo are built on top
of the classic system, so understanding it is important to gain better
understanding of what the more high-level OOP systems do.
Getting started with Classic Perl OOP