random_string <- function() {
paste(sample(letters, 50, replace = TRUE), collapse = "")
}
strings10 <- replicate(10, random_string())
strings100 <- replicate(100, random_string())
collapse <- function(xs) {
out <- ""
for (x in xs) {
out <- paste0(out, x)
}
out
}
bench::mark(
loop10 = collapse(strings10),
loop100 = collapse(strings100),
vec10 = paste(strings10, collapse = ""),
vec100 = paste(strings100, collapse = ""),
check = FALSE
)[c("expression", "min", "median", "itr/sec", "n_gc")]
#> # A tibble: 4 × 4
#> expression min median `itr/sec`
#> <bch:expr> <bch:tm> <bch:tm> <dbl>
#> 1 loop10 20.16µs 21.2µs 46149.
#> 2 loop100 526.72µs 541.13µs 1848.
#> 3 vec10 3.59µs 3.81µs 255356.
#> 4 vec100 22.26µs 22.55µs 43076.