Report the Space Allocated for an Object

Description

Provides an estimate of the memory that is being used to store an R object.

Usage

object.size(x)

Arguments

Details

Exactly which parts of the memory allocation should be attributed to which object is not clear-cut. This function merely provides a rough indication. For example, it will not detect if character storage for character strings are shared between identical elements (which it will be if rep was used, for example).

The calculation is of the size of the object, and excludes the space needed to store its name in the symbol table.

Value

An estimate of the memory allocation attributable to the object, in bytes.

Examples

object.size(letters)
object.size(ls)
## find the 10 largest objects in base
z <- sapply(ls("package:base"), function(x) object.size(get(x, envir=NULL)))
as.matrix(rev(sort(z))[1:10])