1911s doing it better for over 100 years. In a critical situation you can carry it cocked and locked. A flick of the thumb makes it ready fire.
below link = “The Gospel According to John Moses Browning”
http://www.frfrogspad.com/jmb.htm
There is no substitute for a good 1911. There are many good reasons why it’s the most duplicated pistol in the world.
Back to Basics,
1911.
The Browning Hi-Power Pistols, by Donald McLean, Desert Publications, The Combat Bookshelf:
Page 20,
II. `Precautions in handling’,
(c) “It is poor safety practice to carry a loaded pistol with a round in its chamber, even with the safety catch on, as the safety can work clear. It is equally poor practice to carry a loaded pistol with a round in the chamber and the hammer uncocked, as it can inadvertently become cocked. If a pistol must be carried with a round in the chamber, put the hammer at half-cock position and apply the safety catch.”
This would apply particularly to a Glock with a 5.5 pound trigger—or even less after modification by the owner—and no safety.
The third option should of course be completely disregarded by Glock owners since it isn’t an option.
If not for your own safety, then for the safety of those around you—leave that chamber empty.