diff --git a/py/rvspecfit/nn/train_interpolator.py b/py/rvspecfit/nn/train_interpolator.py
index 898e7ef..e03ecc9 100644
--- a/py/rvspecfit/nn/train_interpolator.py
+++ b/py/rvspecfit/nn/train_interpolator.py
@@ -192,6 +192,7 @@ def main(args):
             print('loss0', loss0 / spread0)
 
     myint.to(train_dev)
+    # myint.compile() slows down
     tD_0 = tD_0.to(train_dev)
     tSD_0 = tSD_0.to(train_dev)