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future: Unified Parallel and Distributed Processing in R for Everyone

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# future: Unified Parallel and Distributed Processing in R for Everyone

## TL;DR

The Futureverse makes it easy to parallelize existing R code - often
with only a minor change of code. It lowers the barriers so that anyone
can safely speed up their existing R code in a worry-free manner. It is
a cross-platform solution that requires no additional setups or
technical skills. Anyone can be up and running within a few minutes.

At the core of Futureverse is this package, the **future** package. Most
users interact with the future ecosystem using higher-level packages
such as **[futurize](https://futurize.futureverse.org/)** for its
convenience of running map-reduce calls concurrently. Here are some
examples of both:

\
[`library`](https://rdrr.io/r/base/library.html)`(`[`future`](https://future.futureverse.org)`)`\
[`plan`](https://future.futureverse.org/reference/plan.md)`(``multisession``)`\
\
`## Sequential evaluation of an R expression`\
`y`` ``<-`` ``slow_fcn``(``X``[``1``]``)`\
\
`## Parallel evaluation of an R expression`\
`f`` ``<-`` `[`future`](https://future.futureverse.org/reference/future.md)`(``slow_fcn``(``X``[``1``]``)``)`\
`y`` ``<-`` `[`value`](https://future.futureverse.org/reference/value.md)`(``f``)`\
\
\
[`library`](https://rdrr.io/r/base/library.html)`(`[`futurize`](https://futurize.futureverse.org)`)`\
\
`## Sequential and parallel base R apply`\
`y`` ``<-`` `[`lapply`](https://rdrr.io/r/base/lapply.html)`(``X``, ``slow_fcn``)`\
`y`` ``<-`` `[`lapply`](https://rdrr.io/r/base/lapply.html)`(``X``, ``slow_fcn``)`` ``|>`` `[`futurize`](https://futurize.futureverse.org/reference/futurize.html)`(``)`\
\
`## Sequential and parallel purrr map`\
[`library`](https://rdrr.io/r/base/library.html)`(`[`purrr`](https://purrr.tidyverse.org/)`)`\
`y`` ``<-`` ``X`` ``|>``  `[`map`](https://purrr.tidyverse.org/reference/map.html)`(``slow_fcn``)`\
`y`` ``<-`` ``X`` ``|>``  `[`map`](https://purrr.tidyverse.org/reference/map.html)`(``slow_fcn``)`` ``|>`` `[`futurize`](https://futurize.futureverse.org/reference/futurize.html)`(``)`\
\
`## Sequential and parallel foreach calls`\
[`library`](https://rdrr.io/r/base/library.html)`(`[`foreach`](https://github.com/RevolutionAnalytics/foreach)`)`\
`y`` ``<-`` `[`foreach`](https://rdrr.io/pkg/foreach/man/foreach.html)`(``x ``=`` ``X``)`` `[`%do%`](https://rdrr.io/pkg/foreach/man/foreach.html)` ``slow_fcn``(``x``)`\
`y`` ``<-`` `[`foreach`](https://rdrr.io/pkg/foreach/man/foreach.html)`(``x ``=`` ``X``)`` `[`%do%`](https://rdrr.io/pkg/foreach/man/foreach.html)` ``slow_fcn``(``x``)`` ``|>`` `[`futurize`](https://futurize.futureverse.org/reference/futurize.html)`(``)`

## Introduction

The purpose of the **[future](https://future.futureverse.org)** package
is to provide a very simple and uniform way of evaluating R expressions
asynchronously using various resources available to the user.

In programming, a *future* is an abstraction for a *value* that may be
available at some point in the future. The state of
…

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