---
features:
  - |
    Improve the performance of average snapshot data in simulator results.
    This effects probability, Pauli expectation value, and density matrix snapshots
    using the following extensions:

    * :class:`qiskit.providers.aer.extensions.SnapshotExpectationValue`
    * :class:`qiskit.providers.aer.extensions.SnapshotProbabilities`
    * :class:`qiskit.providers.aer.extensions.SnapshotDensityMatrix`
