workout {bench}

Workout a group of expressions individually

Description

Given an block of expressions in {} workout() individually times each expression in the group. workout_expressions() is a lower level function most useful when reading lists of calls from a file.

Usage

workout(expr, description = NULL)

workout_expressions(exprs, env = parent.frame(), description = NULL)

Arguments

expr

one or more expressions to workout, use {} to pass multiple expressions.

description

A name to label each expression, if not supplied the deparsed expression will be used.

exprs

A list of calls to measure.

env

The environment in which the expressions should be evaluated.

Examples

workout({
  x <- 1:1000
  evens <- x %% 2 == 0
  y <- x[evens]
  length(y)
  length(which(evens))
  sum(evens)
})

# The equivalent to the above, reading the code from a file
workout_expressions(as.list(parse(system.file("examples/exprs.R", package = "bench"))))