patch 8.0.1369: MS-Windows: drawing underline slow, mFallbackDC not updated commit https://github.com/vim/vim/commit/92467d3351853de769329f62121bf34d28647546 Author: Bram Moolenaar <Bram@vim.org> Date: Tue Dec 5 13:22:16 2017 +0100 patch 8.0.1369: MS-Windows: drawing underline slow, mFallbackDC not updated Problem: MS-Windows: drawing underline, curl and strike-throw is slow, mFallbackDC not properly updated. Solution: Several performance improvements. (Ken Takata, Taro Muraoka, Yasuhiro Matsumoto, closes #2401)