US Patent 12067386 Systems and methods for determining software parity

Systems and methods for determining that a new software program is in parity with a legacy software program. In some aspects, the system receives information for multiple threads processed by a legacy software program. The system processes the information using the new software program, which is executed in parallel with the legacy software program. If an output of a particular thread from the new software program varies outside a threshold distance from a corresponding output for the thread from the legacy software program, the system ceases further processing of the particular thread by the new software program. Otherwise, the system allows processing of the particular thread by the new software program to continue.