profmem: Profile Memory Use
In matter: A framework for rapid prototyping with file-based data structures

Description Usage Arguments Details Value Author(s) See Also Examples

These are utility functions for profiling memory used by objects and by R during the execution of an expression.

1
2
3

profmem(expr)

mem(x, reset = FALSE)

`expr`	An expression to be evaluated.
`x`	An object, to identify how much memory it is using.
`reset`	Should the maximum memory used by R be reset?

These are wrappers around the built-in gc function. Note that they only count memory managed by R.

For profmem, a vector giving [1] the amount of memory used at the start of execution, [2] the amount of memory used at the end of execution, [3] the maximum amount of memory used during execution, [4] the memory overhead as defined by the maximum memory used minus the starting memory use, and [5] the execution time in seconds.

For mem, either a single numeric value giving the memory used by an object, or a vector providing a more readable version of the information returned by gc (see its help page for details).

Kylie A. Bemis

gc,

x <- 1:100

mem(x)

profmem(mean(x + 1))

Loading required package: BiocParallel
Loading required package: Matrix
Loading required package: biglm
Loading required package: DBI

Attaching package: ‘matter’

The following object is masked from ‘package:biglm’:

    biglm

The following objects are masked from ‘package:base’:

    apply, scale

bytes 
  448 
   start (MB)   finish (MB) max used (MB) overhead (MB)    time (sec) 
      154.500       154.500         0.000      -154.500         0.001