patch 8.1.0644: finding next sign ID is inefficient commit https://github.com/vim/vim/commit/6436cd83f90a0efc326798792e49e8ff96a43dce Author: Bram Moolenaar <Bram@vim.org> Date: Thu Dec 27 00:28:33 2018 +0100 patch 8.1.0644: finding next sign ID is inefficient Problem: Finding next sign ID is inefficient. Solution: Add next_sign_id. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/3717)