Vue Computed vs Method vs Watch: When to Use Each for Performance

In Vue, computed, method, and watch do different jobs. Picking the right one keeps your logic clear and avoids unnecessary work. This post explains when to use each and how they affect performance.

Computed: cached derived state

Computed properties are derived from reactive data. Vue caches the result and only recomputes when a dependency changes. So if you use the same computed in the template ten times, it runs once per dependency change, not ten times per render.