observing track states – should I worry about resources?

I’m re-configuring the functionality of my (2) launchpads: the top 5 rows work as normal clip triggers, the bottom three are: arm – select track – stop all clips.

I’d like the ‘arm’ and ‘select track’ to light up the respective buttons but it means I’ll need 16x observe objects to observe which tracks are armed and also to observe the ‘selected track’ does that sound like a lot of overhead?

what would be a good way for me to measure the impact of implementing this? Live’s CPU meter?

Thanks!!