Priority of background loading thread.
Lets you control how long it takes to load data asynchronously vs performance impact on the game while loading in the background.
Asynchronous load functions that load objects (Resources.LoadAsync, AssetBundle.LoadAssetAsync, AssetBundle.LoadAllAssetAsync), scenes (SceneManager.LoadSceneAsync) do data read and deserealization on a separate background loading thread and object integration on a main thread.
Integration depends on an object type and for textures, meshes means uploading data to the GPU, audio clips prepare data for playing.
To avoid hiccups we limit integration time on a main thread depending on backgroundLoadingPriority value:
- ThreadPriority.Low - 2ms
- ThreadPriority.BelowNormal - 4ms
- ThreadPriority.Normal - 10ms
- ThreadPriority.High - 50ms
This is a maximum time all asynchronous operations can spend within a single frame on a main thread.
Background loading thread uses backgroundLoadingPriority directly.
using UnityEngine;
public class ExampleScript : MonoBehaviour { void Example1() { // Load as much data as possible, as a result frame rate will drop. // Good for fast loading when showing progress bars.
Application.backgroundLoadingPriority = ThreadPriority.High; }
void Example2() { // Load data very slowly and try not to affect performance of the game. // Good for loading in the background while the game is playing.
Application.backgroundLoadingPriority = ThreadPriority.Low; } }
See Also: ThreadPriority enum, AsyncOperation.priority.
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.