# :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: 3689afaab850b3dd175449c5bac5f2ea8f880d24 | Previous: a5bed018f3e589ea4e0c4e5321a165362a440a75 | Ratio | |-|-|-|-| | `benchmarks/common/common_ops_test.py::test_lock_stack_nested` | `121.30358415869281` iter/sec (`stddev: 0.015246090448835372`) | `267.467234829666` iter/sec (`stddev: 0.0008085172348222808`) | `2.20` | 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/3689afaab850b3dd175449c5bac5f2ea8f880d24#commitcomment-133148360

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