you should think about adding a caching layer when your application starts to feel slow or when you notice a lot of

hey all, i've been thinking a lot about performance optimization lately. we all know caching can be a huge win, but it also adds complexity. i'm trying to figure out the right time to introduce a dedicated caching layer (like redis or memcached) versus just relying on in-memory caching or simpler strategies. what are your thoughts on the tipping points? are there specific metrics or scenarios where you'd say, 'okay, it's time for a proper cache'? looking forward to hearing your experiences