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Bash-completion is very slow on MSYS2

Bash-completion is very slow on MSYS2 when the current user is a domain user. This describes the cause and the solutions.

Cause

Expansion of ~* is very slow when you use a domain user. For example:

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#!/bin/bash
#####################################################
# Name: Bash CheatSheet for Mac OSX
# 
# A little overlook of the Bash basics
#
# Usage:
#
# Author: J. Le Coupanec
# Date: 2014/11/04

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#############################                   Bash CheatSheet Printable          ###############################
#
#    Based on https://gist.github.com/LeCoupa/122b12050f5fb267e75f
#    Removed the more common ones, and added some examples. Also reformatted for easier printing.

# 0  Shortcuts.
CTRL+A                        # move to beginning of line
CTRL+B                        # moves backward one character
ALT+B                         # moves backward one word
CTRL+C                        # halts the current command