Dealing with Vue's performance problems when using input type color and v-model

I am encountering a problem with setting the v-model on an input of type color. Whenever I change the color, there is a noticeable drop in frame rate and the application's FPS spikes from 60 to 3. You can see it reflected in the Vue performance graph screenshots below:

https://i.stack.imgur.com/2t4h2.png

https://i.stack.imgur.com/6okPE.png

How can I address this performance issue? It's worth mentioning that I am not utilizing Vue single-file components. Instead, I only have a Vue instance on a standalone page and rely on v-model to manage input changes. Below is the code snippet for the color input:

<div v-if="conf.type === 'color'" class="col-1">
    <input type="color" v-model="conf.default">
</div>

What could be causing such a sudden drop in FPS? Is there a solution to mitigate this issue? This behavior is observed on Chrome version 83.0, although tests on other browsers are pending.

Please note that implementing @change alleviates the performance problems. Here is the revised code snippet:

<div v-if="conf.type === 'color'" class="col-1">
    <input type="color" @change="setStyle($event)">
</div>

It seems that the issues arise specifically when using v-model. While I would prefer to utilize it for real-time color updates, the @change listener ensures the value is updated once the color input loses focus.

Answer №1

It seems like you are utilizing color to make updates in various parts of your DOM. The color picker feature can be quite resource-intensive, especially if the user is continuously adjusting it. This could potentially impact the performance of your application based on how you handle the color data. One suggestion to improve performance is to control how frequently the color updates occur.

<input type="color" v-model="color">

In this scenario, I'm employing lodash's throttle function to limit the frequency of color changes to every 500 milliseconds.

import throttle from 'lodash/throttle'

{
    watch: {
         color: function () {
             this.throttledColor()
         }
    },
    methods: {
        // Update color every 500 milliseconds
        throttledColor: throttle(function () {
            this.conf.default = this.color
        }, 500)
    }

}

You can view a comparison between standard color updates and throttled updates in this StackBlitz demo.

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