# :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

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