Reduce delay in task manager, N5X

[mscir]

I have a Nexus 5x, I would like to reduce the 1 second delay to 0 in the task manager before the close X appears at the top right of each window. To be clear, when I click the square on the home screen, I see windows for all of the apps that are running, after about 1 second an X appears at the top right of each window that allows me to close the app. I would like to remove that delay, if possible. Does anyone know how to do this?

 

[B. Diddy]

Moved to the Nexus 5X forum.