./wip/R-future, Unified parallel and distributed processing in R

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Branch: CURRENT, Version: 1.33.0, Package name: R-future-1.33.0, Maintainer: pkgsrc-users

The purpose of this package is to provide a lightweight and unified
Future API for sequential and parallel processing of R expression via
futures. The simplest way to evaluate an expression in parallel is to
use `x %<-% { expression }` with `plan(multisession)`. This package
implements sequential, multicore, multisession, and cluster futures.
With these, R expressions can be evaluated on the local machine, in
parallel a set of local machines, or distributed on a mix of local and
remote machines. Extensions to this package implement additional
backends for processing futures via compute cluster schedulers, etc.
Because of its unified API, there is no need to modify any code in
order switch from sequential on the local machine to, say, distributed
processing on a remote compute cluster. Another strength of this
package is that global variables and functions are automatically
identified and exported as needed, making it straightforward to tweak
existing code to make use of futures.

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