Exercise

Relative time

When benchmarking it's important to consider both absolute and relative times. Using the timings below, on average a single call to read.csv() is 720 - 80 = 640 milliseconds slower than that of readRDS().

```{r eval=FALSE}

microbenchmark(read.csv("movies.csv"), readRDS("movies.rds"), times = 10)

Unit: milliseconds expr min lq mean median uq neval cld read.csv("movies.csv") 540 660 680 720 720 740 10 b readRDS("movies.rds") 70 80 90 80 100 110 10 a ```

Approximately, how much slower is the mean time of read.csv() compared to readRDS()?

Instructions

50 XP

Possible Answers

3 times slower.
6 times slower.
9 times slower.