Disparate Data: Should You Fetch in Real-Time or Cache for Speed?

How do you build UIs or generate reports when you have disparate data from multiple services owning their own data? Should you fetch data at runtime by calling various services, or precompute and cache the data to improve performance? 🔗 Kurrent (formely EventStoreDB) https://kurrent.io 🔔 Subscribe:    / @codeopinion   💥 Join this channel to get access to a private Discord Server and any source code in my videos. 🔥 Join via Patreon   / codeopinion   ✔️ Join via YouTube    / @codeopinion   📝 Blog: https://codeopinion.com 👋 Twitter:   / codeopinion   ✨ LinkedIn:   / dcomartin   📧 Weekly Updates: https://mailchi.mp/63c7a0b3ff38/codeo... 0:00 Composition 2:36 Events 4:56 Fat Events 6:18 Trade-offs