What is the most efficient way to cast a list as a data frame?

Question

Very often I want to convert a list wherein each index has identical element types to a data frame. For example, I may have a list:

> my.list
[[1]]
[[1]]         


        

Answer 1

The dplyr package's bind_rows is efficient.

one <- mtcars[1:4, ]
two <- mtcars[11:14, ]
system.time(dplyr::bind_rows(one, two))
   user  system elapsed 
  0.001   0.000   0.001