Moving up and down the line using <number>j or <number>k is not instantaneous

[pangteypiyush]

Describe the bug
Moving up and down the line using <number>j or <number>k is not instantaneous.

To Reproduce
Steps to reproduce the behavior:

1. Open a file with 1000s of lines
2. move up or down using 100j / 500j / 900k

Expected behavior
Cursor moves extremely slowly.

Environment (please complete the following information):

• Extension (VsCodeVim) version: v1.21.4
• VSCode version: v1.57.1
• OS: Linux

Additional context

1. <number>h/l happens instantly.
2. <number>gg happens instantly.
3. Up and down movements are repeated <number> times. But:
   <number>j is effectively min(last line, current line + <number>) gg
<number>k is effectively max(0, current line - <number>) gg

[pangteypiyush]

This is related to vim.foldfix. Works perfectly if this is disabled.

[pangteypiyush]

Duplicate #3351, #2914, #2468