Description Usage Arguments Examples

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.

1 2 3 | ```
workout(expr, description = NULL)
workout_expressions(exprs, env = parent.frame(), description = NULL)
``` |

`expr` |
one or more expressions to workout, use |

`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. |

1 2 3 4 5 6 7 8 9 10 11 | ```
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"))))
``` |

```
# A tibble: 6 x 3
exprs process real
<bch:expr> <bch:tm> <bch:tm>
1 x <- 1:1000 9.92µs 12.4µs
2 evens <- x%%2 == 0 39.2µs 40.53µs
3 y <- x[evens] 12.59µs 13.59µs
4 length(y) 2.52µs 3.34µs
5 length(which(evens)) 8.59µs 9.54µs
6 sum(evens) 4.58µs 5.48µs
# A tibble: 6 x 3
exprs process real
<bch:expr> <bch:tm> <bch:tm>
1 x <- 1:1000 5.16µs 7.63µs
2 evens <- x%%2 == 0 33.72µs 34.81µs
3 y <- x[evens] 9.83µs 10.73µs
4 length(y) 1.11µs 1.91µs
5 length(which(evens)) 8.01µs 8.82µs
6 sum(evens) 4.09µs 4.77µs
```

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