CODEWITHSUNDEEP
c#unity-game-engine
user6401627
user6401627

Reputation:

First time setting a gameobject to active it lags

When I first set a particular gameobject in the Canvas element to active, (SetActive(true)), it lags for a good second or so. Sequential activations are instantaneous. Note that this only happens in the standalone player. In the editor, it doesn't lag at all. My guess is obviously that the first time it has to load the asset. However, can I preload this particular asset in any way? I attempted to do so in the build settings under optimization, but that didn't affect anything. And no, I don't have any code in the Start() function or the OnEnable() function of the said gameobject that's being enabled.

Upvotes: 0

Views: 3695

Answers (2)

Bip901
Bip901

Reputation: 808

The accepted answer is a workaround, not a solution. Keeping hundreds of UI elements loaded is an utter waste of memory.

You should instead divide up your canvases, as written in this wonderful article by Unity. The reason for the lag is Unity's updating all canvas contents, even disabled objects, when you enable an object for the first time. To prevent unused objects from updating, isolate them in a different canvases. You can even put those canvases as children of your original canvas if you wish.

Upvotes: 1

Programmer
Programmer

Reputation: 125275

That's expected.The lag depends on how many UI components and GameObjects that are under the hierarchy of the Canvas. There is so much memory allocation and draw calls when SetActive(true) is used on a Canvas or UI component. The fix is simple. Instead of using SetActive(true) for UI, disable the component by modifying the enabled property.

For example, to enable/disable the the Canvas:

Canvas canvas;
canvas.enabled = true; //Enable
canvas.enabled = false; //Disable

Let's say that you only want to disable a Text component under a Canvas, use the enabled property to disable that Text component instead of SetActive(true). The-same thing applies to other UI components.

Upvotes: 1

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