patch 8.1.1753: use of popup window mask is inefficient commit https://github.com/vim/vim/commit/e865dcbce1ea2fcdc172b7d47d320cd40f91b917 Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jul 26 22:15:50 2019 +0200 patch 8.1.1753: use of popup window mask is inefficient Problem: Use of popup window mask is inefficient. Solution: Precompute and cache the mask.

README_src.txt for version 8.1 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-8.1-rt.tar.gz).  To be able to run Vim you MUST get the runtime
archive too!