diff --git a/benchmarks/common/common_ops_test.py b/benchmarks/common/common_ops_test.py
index 15b04b4f4..b7c4d6e8e 100644
--- a/benchmarks/common/common_ops_test.py
+++ b/benchmarks/common/common_ops_test.py
@@ -1,3 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
 import argparse
 
 import pytest
diff --git a/benchmarks/common/memmap_benchmarks_test.py b/benchmarks/common/memmap_benchmarks_test.py
index 389febae6..5f5e2849c 100644
--- a/benchmarks/common/memmap_benchmarks_test.py
+++ b/benchmarks/common/memmap_benchmarks_test.py
@@ -1,3 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
 import argparse
 import pathlib
 import time
diff --git a/benchmarks/common/pytree_benchmarks_test.py b/benchmarks/common/pytree_benchmarks_test.py
index 88bd931e0..0b2900c0f 100644
--- a/benchmarks/common/pytree_benchmarks_test.py
+++ b/benchmarks/common/pytree_benchmarks_test.py
@@ -1,3 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
 import pytest
 import torch
 
diff --git a/benchmarks/nn/functional_benchmarks_test.py b/benchmarks/nn/functional_benchmarks_test.py
index d9784ed90..96263ff61 100644
--- a/benchmarks/nn/functional_benchmarks_test.py
+++ b/benchmarks/nn/functional_benchmarks_test.py
@@ -1,3 +1,9 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+
 # we use deepcopy as our implementation modifies the modules in-place
 import argparse
 from copy import deepcopy
diff --git a/benchmarks/tensorclass/test_tensorclass_speed.py b/benchmarks/tensorclass/test_tensorclass_speed.py
new file mode 100644
index 000000000..0c8bf8c7d
--- /dev/null
+++ b/benchmarks/tensorclass/test_tensorclass_speed.py
@@ -0,0 +1,59 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+
+import argparse
+
+import pytest
+import torch
+
+from tensordict.prototype import tensorclass
+
+
+@tensorclass
+class MyData:
+    a: torch.Tensor
+    b: torch.Tensor
+    c: str
+    d: "MyData" = None
+
+
+def test_tc_init(benchmark):
+    z = torch.zeros(())
+    o = torch.ones(())
+    benchmark(lambda: MyData(a=z, b=o, c="a string", d=None))
+
+
+def test_tc_init_nested(benchmark):
+    z = torch.zeros(())
+    o = torch.ones(())
+    benchmark(
+        lambda: MyData(a=z, b=o, c="a string", d=MyData(a=z, b=o, c="a string", d=None))
+    )
+
+
+def test_tc_first_layer_tensor(benchmark):
+    d = MyData(a=0, b=1, c="a string", d=MyData(None, None, None))
+    benchmark(lambda: d.a)
+
+
+def test_tc_first_layer_nontensor(benchmark):
+    d = MyData(a=0, b=1, c="a string", d=MyData(None, None, None))
+    benchmark(lambda: d.c)
+
+
+def test_tc_second_layer_tensor(benchmark):
+    d = MyData(a=0, b=1, c="a string", d=MyData(torch.zeros(()), None, None))
+    benchmark(lambda: d.d.a)
+
+
+def test_tc_second_layer_nontensor(benchmark):
+    d = MyData(a=0, b=1, c="a string", d=MyData(torch.zeros(()), None, "a string"))
+    benchmark(lambda: d.d.c)
+
+
+if __name__ == "__main__":
+    args, unknown = argparse.ArgumentParser().parse_known_args()
+    pytest.main([__file__, "--capture", "no", "--exitfirst"] + unknown)
diff --git a/benchmarks/tensorclass/torch_functions.py b/benchmarks/tensorclass/test_torch_functions.py
similarity index 88%
rename from benchmarks/tensorclass/torch_functions.py
rename to benchmarks/tensorclass/test_torch_functions.py
index 4e3977c10..0dc3c560c 100644
--- a/benchmarks/tensorclass/torch_functions.py
+++ b/benchmarks/tensorclass/test_torch_functions.py
@@ -1,3 +1,8 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
 import pytest
 import torch