Entity Queries

• Count matching entities with entityQuery.CalculateEntityCount() to get number of filtered entities

• Get entity collections with entityQuery.ToEntityArray(Allocator) to retrieve matching entities

• Filter by modified components with entityQuery.SetChangedVersionFilter(ComponentType) to find recently updated entities

System Lifecycle

• Control system activity with systemBase.Enabled to toggle execution state

• Initialize system with systemBase.OnCreate() which is called at system instantiation

• Run per-frame logic with systemBase.OnUpdate() containing the main execution logic

• Clean up resources with systemBase.OnDestroy() called when system is disposed

Job System

• Wait for job completion with jobHandle.Complete() to ensure job has finished executing

• Check job status with jobHandle.IsCompleted to determine if job processing is done

Burst Compilation

• Optimize functions with BurstCompiler.CompileFunctionPointer(delegate) to create high-performance native code

• Check optimization status with BurstCompiler.IsEnabled to determine if Burst is active

Native Containers

• Access array size with nativeArray.Length to get element count

• Release memory with nativeArray.Dispose() to free allocated resources

• Validate array with nativeArray.IsCreated to check if initialized

• Add queue items with nativeQueue.Enqueue(item) to insert at end of queue

• Remove queue items with nativeQueue.Dequeue() to get and remove front item

• Check queue status with nativeQueue.IsEmpty to determine if queue contains items