future_options() has been deprecated in favor of furrr_options() as of furrr 0.2.0.

  globals = TRUE,
  packages = NULL,
  seed = FALSE,
  lazy = FALSE,
  scheduling = 1



A logical, a character vector, a named list, or NULL for controlling how globals are handled. For details, see the Global variables section below.


A character vector, or NULL. If supplied, this specifies packages that are guaranteed to be attached in the R environment where the future is evaluated.


A logical, an integer of length 1 or 7, a list of length(.x) with pre-generated random seeds, or NULL. For details, see the Reproducible random number generation (RNG) section below.


A logical. Specifies whether futures should be resolved lazily or eagerly.


A single integer, logical, or Inf. This argument controls the average number of futures ("chunks") per worker.

  • If 0, then a single future is used to process all elements of .x.

  • If 1 or TRUE, then one future per worker is used.

  • If 2, then each worker will process two futures (provided there are enough elements in .x).

  • If Inf or FALSE, then one future per element of .x is used.

This argument is only used if chunk_size is NULL.


#> Warning: `future_options()` was deprecated in furrr 0.2.0. #> Please use `furrr_options()` instead.
#> <furrr_options>