summaryRprof {utils} | R Documentation

## Summarise Output of R Profiler

### Description

Summarise the output of the `Rprof` function to show the amount of time used by different R functions.

### Usage

    summaryRprof(filename = "Rprof.out", chunksize = 5000)

### Arguments

`filename` | Name of a file produced by `Rprof()`
`chunksize` | Number of lines to read at a time

### Details

This function is an alternative to `R CMD Rprof`. It provides the convenience of an all-R implementation but will be slower for large files.

As the profiling output file could be larger than available memory, it is read in blocks of `chunksize` lines. Increasing `chunksize` will make the function run faster if sufficient memory is available.

### Value

A list with components

`by.self` | Timings sorted by ‘self’ time
`by.total` | Timings sorted by ‘total’ time
`sampling.time` | Total length of profiling run

### See Also

The chapter on “Tidying and profiling R code” in “Writing R Extensions” (see the ‘`doc/manual`’ subdirectory of the R source tree).

`Rprof`

### Examples

    ## Not run:
    ## Rprof() is not available on all platforms
    Rprof(tmp <- tempfile())
    example(glm)
    Rprof()
    summaryRprof(tmp)
    unlink(tmp)
    ## End(Not run)

[Package Contents]