ParallelSum

Calculations with vastly differing runtimes should be parallelized as finely as possible:

A large number of simple calculations should be distributed into as few batches as possible:

By default, definitions in the current context are distributed automatically:

Do not distribute any definitions of functions:

Distribute definitions for all symbols in all contexts appearing in a parallel computation:

Distribute only definitions in the given contexts:

Restore the value of the DistributedContexts option to its default:

Sums with trivial terms may be slower in parallel than sequentially:

Splitting the computation into as few pieces as possible decreases the parallel overhead:

Sum may employ symbolic methods that are faster than an iterative addition of all terms: