Toggle grid values becomes increasingly slow

I have the following line in the env file for toggling grid values:

funckey g 'settoggle gridvalue 1.0 0.5 0.1 0.05 0.01 0.005 0.001; replay set-grid $gridvalue;echo grid = $gridvalue'

This works fine when Allegro is just started, but becomes increasingly slow the longer Allegro has been running. It eventually gets to a point where it takes several seconds to toggle one value, which is really frustrating. Is there a way to solve this?

/F