I am finally a Ruby contributor, I guess. In the next version, Array#join—most of the time—would work up to 2.5x faster.
github.com/ruby/ruby/pu...
Duplicating from https://bugs.ruby-lang.org/issues/22094, please let me know if this is excessive.
Original idea
What if we treat Array#join(" "), Array#join("\n") and Array#joi...