High Precise Measurement of R Expressions Execution Time
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Package benchr
provides an infrastructure (framework) for precise
measurement of R expressions execution time.
To install the package from the CRAN run the following command:
install.packages("benchr", repos = "https://cloud.r-project.org/")
To install the development version the following command can be used:
install.packages("benchr", repos = "https://artemklevtsov.gitlab.io/benchr")
This package contains the compiled code, so to install it on Windows you will also need Rtools.
To measure execution time of arbitrary R code, benchr
provides
function benchmark()
, as well as a number of additional methods for
analysis and representation of results. Hereβs an example of time
measurement for several expressions.
library(benchr)
benchmark(rep(1:100, each = 10), rep.int(1:100, rep.int(10, 100)))
#> Benchmark summary:
#> Time units : microseconds
#> expr n.eval min lw.qu median mean up.qu max total relative
#> rep(1:100, each = 10) 100 20.7 21.10 21.20 22.60 21.40 48.3 2260 2.97
#> rep.int(1:100, rep.int(10, 100)) 100 6.4 6.89 7.16 7.52 7.43 27.4 752 1.00
identical(rep(1:100, each = 10), rep.int(1:100, rep.int(10, 100)))
#> [1] TRUE
The resulting object can be saved as a variable and reused later in further methods:
res <- benchmark(NULL, {NULL}, {{{NULL}}})
summary(res)
#> Time units : nanoseconds
#> expr n.eval min lw.qu median mean up.qu max total relative
#> NULL 100 4 7 13.0 11.4 14 50 1140 1.00
#> { NULL } 100 38 43 48.5 58.6 55 850 5860 3.73
#> { { { NULL } } } 100 118 122 129.0 428.0 138 29100 42800 9.92
To present the results of measurements implemented additional methods
for the class benchmark
object:
mean
β means and confidence intervals for each R expression;summary
β statistics (quantiles, means) for each R expression;print
β text representation of results based on method summary
;plot
β scatter plot the execution time of each expression measure;boxplot
β box plot the execution time of each expression.For further details refer to the manual pages and vignettes:
help(package = "benchr")
Use the following command to go to the page for bug report submissions:
bug.report(package = "benchr")
Before reporting a bug or submitting an issue, please do the following:
news(package = "benchr", Version == packageVersion("benchr"))
command;benchr
package, rather than in the code that you pass, that is other
functions or packages;When submitting a bug report please include the output produced by
functions traceback()
and sessionInfo()
. This may save a lot of
time.
The benchr
package is distributed under
GPLv2 license.