I agree that there is no difference if you would create as many threads as forked processes.
The difference is that you need to call fork once for every planned task - whereas in a thread model you can share data and thus you would start threads only 5 times depending on the number of workers as the workers can get the data from a queue instead of a function parameter.

In reply to Re^3: forks for running multiple codes at same time by weismat
in thread forks for running multiple codes at same time by adamquestion

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