diff --git a/benchmark/configure.py b/benchmark/configure.py
index 9924d63..3473da2 100644
--- a/benchmark/configure.py
+++ b/benchmark/configure.py
@@ -164,9 +164,10 @@ def main():
 
     # Cycles device.
     device = 'CPU' if args.benchmark_device_type == 'CPU' else 'GPU'
+    tile_size = 16 if device == 'CPU' else 512
     for scene in bpy.data.scenes:
         scene.cycles.device = device
-        # TODO(sergey): Tweak tile size.
+        scene.render.tile_x = scene.render.tile_y = tile_size
 
     # Report number of CPU threads used.
     for scene in bpy.data.scenes: