I'm a huge Vim fan and using it since 2002 (the year I've started to learn Linux and how to compile Gentoo kernel). It's a fundamental part of my life. But lately, I'm very sad about the performance on macOS terminals (iTerm2 and Terminal.app). On Linux, vim is literally flying, but on macOS, Vim rendering is very slow and lagging. This wasn't always the case though. Some of the older version of i