diff --git a/src/python/python/ad/integrators/common.py b/src/python/python/ad/integrators/common.py
index a8fdbba24..313704415 100644
--- a/src/python/python/ad/integrators/common.py
+++ b/src/python/python/ad/integrators/common.py
@@ -103,7 +103,6 @@ def render(self: mi.SamplingIntegrator,
 
             # Explicitly delete any remaining unused variables
             del sampler, ray, weight, pos, L, valid
-            gc.collect()
 
             # Perform the weight division and return an image tensor
             film.put_block(block)
@@ -212,7 +211,6 @@ def render_backward(self: mi.SamplingIntegrator,
                 film.put_block(block)
 
                 del valid
-                gc.collect()
 
                 # This step launches a kernel
                 dr.schedule(block.tensor())
@@ -226,7 +224,6 @@ def render_backward(self: mi.SamplingIntegrator,
 
             # We don't need any of the outputs here
             del ray, weight, pos, block, sampler
-            gc.collect()
 
             # Run kernel representing side effects of the above
             dr.eval()
@@ -619,11 +616,6 @@ def render_forward(self: mi.SamplingIntegrator,
             del sampler, ray, weight, pos, L, valid, aovs, δL, δaovs, \
                 valid_2, params, state_out, state_out_2, block
 
-            # Probably a little overkill, but why not.. If there are any
-            # DrJit arrays to be collected by Python's cyclic GC, then
-            # freeing them may enable loop simplifications in dr.eval().
-            gc.collect()
-
             result_grad = film.develop()
 
         return result_grad
@@ -725,11 +717,6 @@ def splatting_and_backward_gradient_image(value: mi.Spectrum,
 
                 film.put_block(block)
 
-                # Probably a little overkill, but why not.. If there are any
-                # DrJit arrays to be collected by Python's cyclic GC, then
-                # freeing them may enable loop simplifications in dr.eval().
-                gc.collect()
-
                 image = film.develop()
 
                 dr.set_grad(image, grad_in)
@@ -790,7 +777,6 @@ def splatting_and_backward_gradient_image(value: mi.Spectrum,
             del L_2, valid_2, aovs_2, state_out, state_out_2, \
                 δL, δaovs, ray, weight, pos, sampler
 
-            gc.collect()
 
             # Run kernel representing side effects of the above
             dr.eval()
diff --git a/src/python/python/ad/projective.py b/src/python/python/ad/projective.py
index 1b8397291..a2bf8b96d 100644
--- a/src/python/python/ad/projective.py
+++ b/src/python/python/ad/projective.py
@@ -269,12 +269,6 @@ def init_indirect_silhouette(self,
         elif parent.guiding == 'octree':
             self.init_indirect_silhouette_octree(scene, sensor, seed)
 
-        # After cleaning up, only necessary guiding distribution storage should
-        # exist in the device memory. This usually occupies dozens of MBs for
-        # octree, and ~0.75GB for grid based guiding with default settings.
-        gc.collect()
-        gc.collect()
-        # TODO this should happen automatically
 
     @dr.syntax
     def init_indirect_silhouette_grid_unif(self, scene, sensor, seed):