| # cluster helper function | |
| # behaves like purrr::map | |
| map_parallel <- function(cl, .x, .f, ..., chunk.size = NULL) { | |
| # before R 3.5, parLapplyLB doesn't actually load balance | |
| if (getRversion() < "3.5") { | |
| parallel::parLapplyLB( | |
| cl = cl, | |
| X = .x, | |
| fun = as_mapper(.f), | |
| ... | |
| ) | |
| } else { | |
| parallel::parLapplyLB( | |
| cl = cl, | |
| X = .x, | |
| fun = as_mapper(.f), | |
| ..., | |
| chunk.size = chunk.size | |
| ) | |
| } | |
| } | |