:w stuck in writing file

[AngleWing]

Describe the bug
In a pretty large workspace, after editing file for a while, use ":w" to save file will stuck for at least 5 seconds. Any command to vim will not be accepted. "hjkl" are not working but arrow keys are working. Can switch file tabs but cannot save them even with "ctrl+s"

To Reproduce
Steps to reproduce the behavior:

1. Go to a file
2. Enter insert mode to edit then exit
3. Type ":w" to save file
4. The vim is frozen for at least 5 seconds

Expected behavior
The file is saved immediately and vim is reponding to new commands.

Environment (please complete the following information):
Ubuntu 18.04

• Extension (VsCodeVim) version: 1.9.0
• VSCode version: 1.37.1
• OS: Ubuntu 18.04

Additional context
Don't know if it relates to the large workspace. If the file is bigger, it takes longer.

[J-Fields]

Does saving from the command palette result in a similar delay?

[stevenguh]

I think this could be similar to what we discussed in #3998
EDIT: On a second thought, I think this is probably different than the link above.