diff --git a/cura/ConvexHullJob.py b/cura/ConvexHullJob.py
index 63eec87fb3..2388d1c9aa 100644
--- a/cura/ConvexHullJob.py
+++ b/cura/ConvexHullJob.py
@@ -31,6 +31,8 @@ class ConvexHullJob(Job):
                     self._node.callDecoration("setConvexHullJob", None)
                     return
 
+                Job.yieldThread()
+
         else: 
             if not self._node.getMeshData():
                 return
diff --git a/plugins/3MFReader/ThreeMFReader.py b/plugins/3MFReader/ThreeMFReader.py
index 9ca8875543..2b20954988 100644
--- a/plugins/3MFReader/ThreeMFReader.py
+++ b/plugins/3MFReader/ThreeMFReader.py
@@ -10,6 +10,7 @@ from UM.Scene.SceneNode import SceneNode
 from UM.Scene.GroupDecorator import GroupDecorator
 from UM.Math.Quaternion import Quaternion
 
+from UM.Job import Job
 
 import os
 import struct
@@ -53,6 +54,7 @@ class ThreeMFReader(MeshReader):
                     #for vertex in object.mesh.vertices.vertex:
                     for vertex in object.findall(".//3mf:vertex", self._namespaces):
                         vertex_list.append([vertex.get("x"), vertex.get("y"), vertex.get("z")])
+                        Job.yieldThread()
 
                     triangles = object.findall(".//3mf:triangle", self._namespaces)
 
@@ -64,6 +66,8 @@ class ThreeMFReader(MeshReader):
                         v2 = int(triangle.get("v2"))
                         v3 = int(triangle.get("v3"))
                         mesh.addFace(vertex_list[v1][0],vertex_list[v1][1],vertex_list[v1][2],vertex_list[v2][0],vertex_list[v2][1],vertex_list[v2][2],vertex_list[v3][0],vertex_list[v3][1],vertex_list[v3][2])
+                        Job.yieldThread()
+
                     #TODO: We currently do not check for normals and simply recalculate them.
                     mesh.calculateNormals()
                     node.setMeshData(mesh)
@@ -116,6 +120,8 @@ class ThreeMFReader(MeshReader):
                         node.rotate(rotation)
                     result.addChild(node)
 
+                    Job.yieldThread()
+
                 #If there is more then one object, group them.
                 try:
                     if len(objects) > 1:
diff --git a/plugins/CuraEngineBackend/ProcessSlicedObjectListJob.py b/plugins/CuraEngineBackend/ProcessSlicedObjectListJob.py
index 0a9322b7cb..67a24c368d 100644
--- a/plugins/CuraEngineBackend/ProcessSlicedObjectListJob.py
+++ b/plugins/CuraEngineBackend/ProcessSlicedObjectListJob.py
@@ -38,10 +38,10 @@ class ProcessSlicedObjectListJob(Job):
         for node in DepthFirstIterator(self._scene.getRoot()):
             if type(node) is SceneNode and node.getMeshData():
                 if node.callDecoration("getLayerData"):
-                #if hasattr(node.getMeshData(), "layerData"):
                     self._scene.getRoot().removeChild(node)
                 else:
                     objectIdMap[id(node)] = node
+            Job.yieldThread()
 
         settings = Application.getInstance().getMachineManager().getActiveProfile()
         layerHeight = settings.getSettingValue("layer_height")
@@ -91,6 +91,8 @@ class ProcessSlicedObjectListJob(Job):
 
                     layer_data.addPolygon(layer.id, polygon.type, points, polygon.line_width)
 
+                Job.yieldThread()
+
                 current_layer += 1
                 progress = (current_layer / layer_count) * 100
                 # TODO: Rebuild the layer data mesh once the layer has been processed.