Performance question

If i have an action that runs every tick like for example if a var=1 set mirrored true. Does it run every tick and set the object to be mirrored even if it's already mirrored and nothing actually changes? Same question for pin set var and others.

Most events are checked every tick even if you don't add 'every tick'. It doesn't affect performance.

If i have an action that runs every tick like for example if a var=1 set mirrored true. Does it run every tick and set the object to be mirrored even if it's already mirrored and nothing actually changes? Same question for pin set var and others.

just to ensure you can add another condition like

if var=1

if "object"is not mirrored

set mirrored true