Performance of :key for non-reactive data

[WilliamVenner]

Is there a performance overhead associated with setting :key if I know the data I'm iterating is non-reactive/never going to change?

If there is, is it negligible enough to always set :key as a best practice (which I believe is currently generally recommended)?

[WilliamVenner]

Nevermind, found myself on the v2 repo instead of v3.