patch 8.2.2065: using map() and filter() on a range() is inefficient Commit: https://github.com/vim/vim/commit/f8ca03bf9161ab9ee1a29db1d13c02b317c10029 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Nov 28 20:32:29 2020 +0100 patch 8.2.2065: using map() and filter() on a range() is inefficient Problem: Using map() and filter() on a range() is inefficient. Solution: Do not materialize the range. (closes https://github.com/vim/vim/issues/7388)

README_src.txt for version 8.2 of Vim: Vi IMproved.

The source archive contains the files needed to compile Vim on Unix systems.
It is packed for Unix systems (NL line separator).

For more information, see the README.txt file that comes with the runtime
archive (vim-8.2-rt.tar.gz).  To be able to run Vim you MUST get the runtime
archive too!