Should I be concerned about a short freeze?

[Sojik]

I'm working on an addon that swaps keybind loadouts when I swap dual specs. It works alright but it does all it's magic on one event (namely ACTIVE_TALENT_GROUP_CHANGED). It has to go through every key on a keyboard and all the modifiers for each key and build a table and read from another table. My concern is that it freezes my game momentarily when I switch specs. Is this something I should be concerned about? Will this crash others likely?