Comment by uniqueuid

It's in the readme of the github project.

> In short, the main reasons why MPIRE is faster are:

    When fork is available we can make use of copy-on-write shared objects, which reduces the need to copy objects that need to be shared over child processes

    Workers can hold state over multiple tasks. Therefore you can choose to load a big file or send resources over only once per worker

    Automatic task chunking