How to Improve a Flutter Application’s Performance

How to optimize the Flutter Apps

There are numerous queries on how to improve the performance of our Flutter app. Flutter apps are often productive by default, so you only need to avoid making mistakes when developing the code to ensure that the application runs smoothly and quickly. We can prevent common errors that occur during the optimization of Flutter applications if we follow the advice in this article.

Large Build Function

One of these blunders is a considerable build function. Instead of having one large widget, you should divide it into multiple smaller ones. Let us also remember to utilize const as often as feasible for our devices; this allows us to capture and reuse widgets, avoiding wasteful rebuilds caused by their ancestors.

Costly work

Second, you should avoid doing repetitive and expensive work in the construct() method. Because the build method is called frequently when ancestral Widgets are rebuilt, a costly build method will use more CPU power than is required.


Third, only utilize the Opacity Widget when essential, particularly during animation. As we can see, the animation works; however, animating the Opacity widget directly forces it to rebuild each frame, which is inefficient. Instead, consider the following alternatives: Animated Opacity, Transparent Image, and Fade In Transition.

Expensive Widgets

The fourth blunder is using “Expensive Widgets.” Clipping Widgets, ShaderMask, ColorFilter, Chip, and Text could be costly. Use affects with caution, as they can be expensive as well. Some of them call saveLayer() in the background, which might be a time-consuming procedure.

Lazy Widgets

The following is “Lazy Widgets.” When possible, use Lazy Lists and Lazy Grids. This will only generate the elements now visible on the screen.

Everyone understands that Flutter is powerful enough to execute our apps without errors. Still, it is always a good idea to follow best practices and optimize our apps as much as possible. Because if the widget does not change during the rebuild, Flutter will optimize it for you inside. The device will be considered constant and will not be rebuilt.


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