How to improve into vim of MacOS Mojave the speed of vertical scroll with bottom/up keys?

Solution 1:

How to improve into vim of MacOS Mojave the speed of vertical scroll with bottom/up keys?

You didn't tell which Vim's variant you use, whereas there's no such thing as "standard Vim" in MacOS. In fact lots of things aren't described either, including Terminal's window geometry (the more text is shown at once, the more CPU cycles it'd be needed to scroll it), Terminal's active profile (some of them are slimmer and others have somewhat complex graphics thanks to additional effects — "Silver Aerogel" is one example).

I use homebrew's version of Vim and can tell that its scrolling is quite fast (at least there's no slowness) both in Terminal and in iTerm2.

Hence, a few suggestions that logically follows:

• Try changing either Vim or terminal (or both).
• Try using GUI version (gvim) and compare its scrolling performance.

You can give a try to Activity Monitor's CPU monitoring (with shortest update interval possible) to see if it shows any major CPU consuming processes during scrolling in Vim.