rails/rails — comment on commit 36253916b0b788d6ded56669d37c96ed05c92c5c
File:  line 0
By josevalim:

Besides, the performance difference in the stack overflow post is totally
rofscale. Unlikely to make a difference in any real code. Choose the one
that will read better and suit you the best. For the same reason, we choose
map(&:to_s) for readability albeit slower.