Checking what controllers uses pre/post infinity

[likage]

What is the best way that I can check if (a) controllers are using pre/post (cycle) infinity?

Currently I am using the following:

# Get the first frame used in all controllers
first_frame = cmds.findKeyframe(controller_selections, which="first")
# Get the last frame used in all controllers

last_frame = cmds.findKeyframe(controller_selections, which="last")

# Execute my method to set key towards all controllers (see below for the cmds.bakeResults)

anim_bakeout(controller_selections, (first_frame, last_frame))

as a way to enforce all controllers within a rig are keyed at all frames.

for ctrl in controller_selections:
    cmds.bakeResults(

        ctrl,

        hierarchy="both",

        preserveOutsideKeys=True,

        simulation=True,

        time=(first_frame, last_frame)

    )

This is done so that it does not messed up the `cmds.bakeResults` should I should be baking a certain frame range.

However, while doing the above pre-checking, if my rig in scene does have a lot of controllers (eg. a creature rig which has about 300+ controllers), the process can be slow?