when bench::mark is stop??

General
1

I learned that the bench will stop without comparison for different outputs.

dat <- data.frame(x = runif(10000, 1, 1000), 
                  y=runif(10000, 1, 1000))

bench::mark(
  dat[dat$x > 500, ],
  dat[which(dat$x > 499), ],
  subset(dat, x > 500)
)

However, the code below did not stop it.

dat <- data.frame(x = rnorm(10000, 30, 10), 
                  y = rnorm(10000, 20, 4))

bench::mark(
  dat[dat$x > 500, ],
  dat[which(dat$x > 499), ],
  subset(dat, x > 500)
)

When will it stop? Why didn't it stop?

2

The tests are all equal in the final example as they are all empty data frames, so that is why there is no error stop, just a normal completion (after about 1second on my machine)