How to optimize UIs in Unity

Sergey Begichev, Client Developer at Pixonic (MY.GAMES), wrote about UI optimization in Unity3D. While rendering a set of textures may seem simple, it can lead to significant performance issues. For instance, in our War Robots project, unoptimized UI versions accounted for up to 30% of the total CPU load — an astonishing figure!

Typically, this problem arises under two conditions: one, when there are numerous dynamic objects and two, when designers create layouts that prioritize reliable scaling across different resolutions. Even a small UI can generate a noticeable load under these circumstances. Read to know how this works, how to identify the causes of the load and find potential solutions.