# :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: 674f356d634077f1402ac17d32d6d5e1af68aec8 | Previous: c38e256f4c5c6748eab66566d0634a35a4052b99 | Ratio | |-|-|-|-| | `benchmarks/common/common_ops_test.py::test_membership_stacked_nested_last` | `75536.3165492097` iter/sec (`stddev: 0.000001327586142914972`) | `204590.246708863` iter/sec (`stddev: 4.237074171694531e-7`) | `2.71` | | `benchmarks/common/common_ops_test.py::test_membership_stacked_nested_leaf_last` | `77033.11476135107` iter/sec (`stddev: 8.84540212563052e-7`) | `201421.83080267964` iter/sec (`stddev: 3.765795438167392e-7`) | `2.61` | 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/674f356d634077f1402ac17d32d6d5e1af68aec8#commitcomment-149814085

Performance alert! Previous value was 204590.246708863 and current value is 75536.3165492097. It is 2.7085017651817647x worse than previous exceeding a ratio threshold 2