Exactly which parts of the memory allocation should be attributed to
which object is not clear-cut. This function merely provides a rough
indication: it should be reasonably accurate for atomic vectors, but
does not detect if elements of a list are shared, for example.
(Sharing amongst elements of a character vector is taken into account,
but not that between character vectors in a single object.) The calculation is of the size of the object, and excludes the space
needed to store its name in the symbol table.
Associated space (e.g., the environment of a function and what the
pointer in a EXTPTRSXP
points to) is not included in the
calculation.
Object sizes are larger on 64-bit builds than 32-bit ones, but will
very likely be the same on different platforms with the same word
length and pointer size.
units = "auto"
in the format
and print
methods
chooses the largest units in which the result is one or more (before
rounding). Values in kilobytes, megabytes or gigabytes are rounded to
the nearest 0.1
.