# :warning: **Performance Alert** :warning: Possible performance regression was detected for benchmark **'CPU Benchmark Results'**. Benchmark result of this commit is worse than the previous benchmark result exceeding threshold `2`. | Benchmark suite | Current: d7529ab5fed8cfa3152c7d5385be81618c408086 | Previous: 4949efa80102a9af61130f316657a7b9e14f433f | Ratio | |-|-|-|-| | `benchmarks/common/common_ops_test.py::test_membership_stacked_nested_last` | `76228.74186915864` iter/sec (`stddev: 0.0000010751476528878366`) | `228124.4633398589` iter/sec (`stddev: 3.8364644730810283e-7`) | `2.99` | | `benchmarks/common/common_ops_test.py::test_membership_stacked_nested_leaf_last` | `77415.87604345194` iter/sec (`stddev: 7.591631172255536e-7`) | `233952.65195419357` iter/sec (`stddev: 3.7395055968007894e-7`) | `3.02` | This comment was automatically generated by [workflow](https://github.com/pytorch/tensordict/actions?query=workflow%3AContinuous%20Benchmark) using [github-action-benchmark](https://github.com/marketplace/actions/continuous-benchmark). CC: @vmoens Comment was generated at https://github.com/pytorch/tensordict/commit/d7529ab5fed8cfa3152c7d5385be81618c408086#commitcomment-149920615

WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv

WARNING: The directory '/github/home/.cache/pip' or its parent directory is not owned or is not writable by the current user. The cache has been disabled. Check the permissions and owner of that directory. If executing pip with sudo, you should use sudo's -H flag.

Performance alert! Previous value was 228124.4633398589 and current value is 76228.74186915864. It is 2.9926305714374606x worse than previous exceeding a ratio threshold 2