Comparison of two functions for creating list of arrays in R. Lambda-function implementation is about 4 times slower than using rep() function.
> larray1 <- function(nx, B) rep(list(array(data = 0.0, dim = c(nx, 1))), B)
> larray2 <- function(nx, B) lapply(1:B, function(x) x <- array(data = 0.0, dim = c(nx, 1)))
>
> microbenchmark(
+ larray1(1211, 5),
+ larray2(1211, 5)
+ )
Unit: microseconds
expr min lq mean median uq max neval
larray1(1211, 5) 4.560 5.2265 20.02225 5.441 5.787 1451.447 100
larray2(1211, 5) 24.211 25.2730 74.86904 26.050 26.729 4847.783 100