71 lines
2.3 KiB
Markdown
71 lines
2.3 KiB
Markdown
|
# Getting started
|
||
|
|
|
||
|
|
Burst is primarily designed to work with Unity's [job system](https://docs.unity3d.com/Manual/JobSystem.html). To start using the Burst compiler in your code, decorate a [Job struct](https://docs.unity3d.com/ScriptReference/Unity.Jobs.IJob.html) with the [`[BurstCompile]`](xref:Unity.Burst.BurstCompileAttribute) attribute. Add the `[BurstCompile]` attribute to the type and the static method you want Burst to compile.
|
||
|
|
|
||
|
|
|
||
|
|
```c#
|
||
|
|
using Unity.Burst;
|
||
|
|
using Unity.Collections;
|
||
|
|
using Unity.Jobs;
|
||
|
|
using UnityEngine;
|
||
|
|
|
||
|
|
public class MyBurst2Behavior : MonoBehaviour
|
||
|
|
{
|
||
|
|
void Start()
|
||
|
|
{
|
||
|
|
var input = new NativeArray<float>(10, Allocator.Persistent);
|
||
|
|
var output = new NativeArray<float>(1, Allocator.Persistent);
|
||
|
|
for (int i = 0; i < input.Length; i++)
|
||
|
|
input[i] = 1.0f * i;
|
||
|
|
|
||
|
|
var job = new MyJob
|
||
|
|
{
|
||
|
|
Input = input,
|
||
|
|
Output = output
|
||
|
|
};
|
||
|
|
job.Schedule().Complete();
|
||
|
|
|
||
|
|
Debug.Log("The result of the sum is: " + output[0]);
|
||
|
|
input.Dispose();
|
||
|
|
output.Dispose();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Using BurstCompile to compile a Job with Burst
|
||
|
|
|
||
|
|
[BurstCompile]
|
||
|
|
private struct MyJob : IJob
|
||
|
|
{
|
||
|
|
[ReadOnly]
|
||
|
|
public NativeArray<float> Input;
|
||
|
|
|
||
|
|
[WriteOnly]
|
||
|
|
public NativeArray<float> Output;
|
||
|
|
|
||
|
|
public void Execute()
|
||
|
|
{
|
||
|
|
float result = 0.0f;
|
||
|
|
for (int i = 0; i < Input.Length; i++)
|
||
|
|
{
|
||
|
|
result += Input[i];
|
||
|
|
}
|
||
|
|
Output[0] = result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
## Limitations
|
||
|
|
|
||
|
|
Burst supports most C# expressions and statements, with a few exceptions. For more information, see [C# language support](csharp-language-support.md).
|
||
|
|
|
||
|
|
## Compilation
|
||
|
|
|
||
|
|
Burst compiles your code [just-in-time (JIT)](https://en.wikipedia.org/wiki/Just-in-time_compilation) while in Play mode in the Editor, and [ahead-of-time (AOT)](https://en.wikipedia.org/wiki/Ahead-of-time_compilation) when your application runs in a Player. For more information on compilation, see [Burst compilation](compilation.md)
|
||
|
|
|
||
|
|
## Command line options
|
||
|
|
|
||
|
|
You can pass the following options to the Unity Editor on the command line to control Burst:
|
||
|
|
|
||
|
|
- `--burst-disable-compilation` disables Burst.
|
||
|
|
- `--burst-force-sync-compilation` force Burst to compile synchronously. For more information, see [Burst compilation](compilation.md).
|