Merge pull request #250 from Unity-Technologies/fix_waits

Remove waits for 2x perf

com.unity.perception/Runtime/GroundTruth/Labelers/InstanceSegmentationLabeler.cs

                 m_InstancePath = $"{k_Directory}/{k_FilePrefix}{frameCount}.png";
                 var localPath = $"{Manager.Instance.GetDirectoryFor(k_Directory)}/{k_FilePrefix}{frameCount}.png";
 
-                var colors = new NativeArray<Color32>(data, Allocator.TempJob);
+                var colors = new NativeArray<Color32>(data, Allocator.Persistent);
 
                 var asyncRequest = Manager.Instance.CreateRequest<AsyncRequest<AsyncWrite>>();
 

com.unity.perception/Runtime/GroundTruth/Labelers/SemanticSegmentationLabeler.cs

             });
             asyncRequest.data = new AsyncSemanticSegmentationWrite
             {
-                data = new NativeArray<Color32>(data, Allocator.TempJob),
+                data = new NativeArray<Color32>(data, Allocator.Persistent),
                 width = targetTexture.width,
                 height = targetTexture.height,
                 path = localPath

com.unity.perception/Runtime/GroundTruth/PerceptionCamera.cs

         {
             // Jobs are not chained to one another in any way, maximizing parallelism
             AsyncRequest.maxJobSystemParallelism = 0;
-
-            // Ensure that read-backs happen before Allocator.TempJob allocations get stale
-            AsyncRequest.maxAsyncRequestFrameAge = 4;
+            AsyncRequest.maxAsyncRequestFrameAge = 0;
 
             Application.runInBackground = true;