How can you optimize performance in a Vue.js application?

Optimizing performance in a Vue.js application can be achieved through various strategies, including using computed properties, lazy loading components, and minimizing watchers.

One effective method is to utilize the computed properties instead of methods for reactive data. Computed properties are cached based on their dependencies and only re-evaluate when those dependencies change, reducing unnecessary computations.

export default {
  data() {
    return {
      price: 100,
      tax: 0.2
    };
  },
  computed: {
    totalPrice() {
      return this.price + (this.price * this.tax);
    }
  }
};

In this example, totalPrice is a computed property that efficiently calculates the total price without recalculating unless price or tax changes. Implementing such strategies can significantly improve your app's performance.