Optimize Object stored in Sessions

Does storing an array of objects or large data set in sessions lowers the performance and contribute in memory consumption while checking for data in sessions, if it is how can we optimize our sessions? Any help would be appreciated.

do you experience performance problems that can be tracked down to the use of Sessions?

Edit: if you plan to store a big array of objects locally, consider using a local collection:

// on client code, pass null to collection to create a client-only-collection

const localCollection = new Meteor.Collection(null);

thanks for the reply