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9004289325.1

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Add new method for single bitstring target when measuring stabilizerstate probabilities_dict (#12147)

* added new method, deterministic helper unction

added new method probabilities_dict_from_bitstrings, moved logic from probabilities_dict to probabilities_dict_from_bitstrings with ability to pass target, probabilities_dict will pass a target of None.

* Adding test timing, fixed algorithm for determining if should get probability for qubit

Added some timing of the tests to determine if the version with a specfic target runs faster then the non-targetted version (which must calculate all 2^n possibilities for stabilizer state test_probablities_dict_single_qubit. When given a target it can skip branches that were not wanting to be calculated

* Adding more tests, fixing deterministic issues with bad target

* Prob of targets with 0.0 probability

* target calc changes

* Simpler way to get all targets

* Need to improve performance with multiple targets

* Simplified the probabilities_dict_from_bitstrings method

simplified the method probabilities_dict_from_bitstrings, less checking was needed, simpler handling of no target value passed in

* Adding tests for targets

* Added tests to test_probablities_dict_qubits

* Add performance boost check when using targets for test_probablities_dict_qubits

* Added Caching to prevent duplicate branch calculations

In stabilizerstate, added the ability to cache previously calculated branches so they do not get recalculated when attempting to get target values, gives a better starting point to calculate from instead of starting from an unknown probability value of 1.0

* improve performance by performing expensive operations only when needed

when creating an array for the outcome in probability, it is only built if the cache key is not found

* Optimization for caching, deterministic calcs for branches, enabling/disabling cache

added more optimization for performance when performing calculations for branches... (continued)

62194 of 69392 relevant lines covered (89.63%)

227000.19 hits per line

Source Files on job 9004289325.1