Macos: How do you disable or accelerate character / emoji keyboard animation?

Context: By default in macOS, you can press cmd + control + space to open the character keyboard (more commonly known as the emoji keyboard). Before the keyboard appears, there is a short delay and a fade in the animation. For documents in which you enter these characters frequently, the delay is considerable and interferes with the writing flow.

The question: How can you speed up the time it takes to display the emoji keyboard? Is there a terminal command to disable animation, or otherwise reduce the time it takes to finally enter the desired character?