Learn how to use modules, avoid unnecessary mutations, use strict mode, optimize getters, and optimize watchers to improve your vuex store and reactivity system.

As per my technology experience , ☀️Use mapGetters, mapState & mapActions efficiently. ☀️Helps avoid unnecessary component re-renders, improving performance. ☀️Opt for strict mode in development . ☀️Reduce number of reactivity updates.

Breaking down your Vuex store into modules is like organizing a bustling kitchen into sections. Each module focuses on a specific area, keeping your code kitchen tidy and efficient. It's about splitting the big picture into smaller, more digestible pieces, each with its own responsibilities. You've got two flavors: static modules, set up when the store is created, and dynamic modules, which you can add or remove as needed—perfect for when you want to keep things light and only use resources when necessary

Think of Vuex mutations like seasoning in cooking—you want just enough to enhance the flavor, not overwhelm it. Overusing mutations, especially deep, nested ones, can slow down your app and make your code harder to follow. Instead, lean on Vuex's computed properties and getters to smartly update based on state changes. When you do need to change the state, consider batching changes with actions for efficiency and clarity. And for those non-essential tasks like logging or debugging, plugins or middleware are your go-to, keeping your state changes clean and focused.

Last updated on Feb 29, 2024

How do you optimize the performance of your vuex store and its reactivity system?

Vuex is a state management library for Vue.js applications. It helps you organize and share data across your components and plugins. However, if you are not careful, you might end up with a bloated and slow vuex store that affects your app's performance and user experience. In this article, you will learn some tips and tricks to optimize your vuex store and its reactivity system.

1 Use modules

One of the first steps to optimize your vuex store is to use modules. Modules allow you to split your store into smaller and more manageable pieces, each with its own state, getters, actions, and mutations. This way, you can avoid having a single giant store that contains everything. Modules also help you namespace your actions and mutations, avoiding name collisions and confusion. You can use modules in two ways: static or dynamic. Static modules are registered at the store creation, while dynamic modules are registered and unregistered on the fly. Dynamic modules are useful for loading data only when needed, saving memory and bandwidth.

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Swapnil Dixit 🇮🇳

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As per my technology experience , ☀️Use mapGetters, mapState & mapActions efficiently. ☀️Helps avoid unnecessary component re-renders, improving performance. ☀️Opt for strict mode in development . ☀️Reduce number of reactivity updates.
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MOUNIKA G.

Sr Performance Test Engineer at State of Maine
Breaking down your Vuex store into modules is like organizing a bustling kitchen into sections. Each module focuses on a specific area, keeping your code kitchen tidy and efficient. It's about splitting the big picture into smaller, more digestible pieces, each with its own responsibilities. You've got two flavors: static modules, set up when the store is created, and dynamic modules, which you can add or remove as needed—perfect for when you want to keep things light and only use resources when necessary
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REJI MODIYIL

Founder @ Hostao® | AutoChat® | Seo Tools® | Content Generator® | Way2Jesus | Start-up Leadership
Each module should contain a defined state, getters, actions, and mutations. Testing: Test modules independently for better debugging and maintainability. Third-party modules: Many libraries and tools leverage Vuex modules for efficient state management. By using modules effectively, you can create well-structured, maintainable, and performant Vuex stores that scale well with your application's complexity.
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2 Avoid unnecessary mutations

Optimizing your vuex store can be done by avoiding unnecessary mutations. Mutations are the only way to change the state in vuex, and they trigger the reactivity system that updates your components. To prevent performance issues and memory leaks, it’s best to use shallow mutations that only change one level of the state object, rather than nested mutations that change multiple levels. Additionally, you should use computed properties or getters to derive new data from the state instead of mutating the state to store derived data. Furthermore, it’s beneficial to use actions to commit multiple mutations in a batch, as opposed to committing them separately. Lastly, plugins or middleware should be used to handle side effects, such as logging, debugging, or persistence, instead of mutating the state directly.

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MOUNIKA G.

Sr Performance Test Engineer at State of Maine
Think of Vuex mutations like seasoning in cooking—you want just enough to enhance the flavor, not overwhelm it. Overusing mutations, especially deep, nested ones, can slow down your app and make your code harder to follow. Instead, lean on Vuex's computed properties and getters to smartly update based on state changes. When you do need to change the state, consider batching changes with actions for efficiency and clarity. And for those non-essential tasks like logging or debugging, plugins or middleware are your go-to, keeping your state changes clean and focused.
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3 Use strict mode in development

Another way to optimize your vuex store is to use strict mode in development. Strict mode is a feature that throws an error if you try to modify the state outside of a mutation. This helps you catch and prevent bugs that might break the reactivity system or cause data inconsistency. However, strict mode also adds some overhead to your app, as it checks every state change. Therefore, you should only use strict mode in development, and disable it in production.

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MOUNIKA G.

Sr Performance Test Engineer at State of Maine
Using strict mode in development for your Vuex store is like having a vigilant guard that ensures you only make state changes through mutations. This guard helps spot and stop any sneaky bugs that might slip into your code, ensuring everything stays consistent and reactive. Just remember, while this guard is fantastic for catching errors early in development, it does require extra resources to monitor every state change. So, it's wise to let the guard rest when your app moves into production, turning strict mode off to keep things running smoothly.
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4 Optimize your getters

Optimizing your vuex store can be done by optimizing your getters. Getters are functions that return a computed value based on the state, and they are cached to prevent unnecessary re-evaluation. To get the most out of your getters, use simple and pure getters that only depend on a few state properties, and take advantage of memoization techniques such as lodash's memoize function or creating your own memoized getter. You can also use the mapGetters helper to access multiple getters in your components, instead of writing them manually. Doing this will help you avoid expensive computations and complex objects while improving the performance of your app.

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5 Optimize your watchers

To optimize your vuex store, you should use watchers sparingly and only for essential tasks, such as fetching data from an API or saving data to local storage. Deep watchers should be used only when necessary, as they watch the entire nested object for changes, while shallow watchers only watch the top-level property. Immediate watchers should also be used judiciously, as they run the watcher function immediately on initialization, while lazy watchers only run the watcher function when the watched value changes. This will help prevent performance issues and memory leaks.

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6 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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How do you optimize the performance of your vuex store and its reactivity system?

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1 Use modules

2 Avoid unnecessary mutations

3 Use strict mode in development

4 Optimize your getters

5 Optimize your watchers

6 Here’s what else to consider

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