This repo provides qiskit.opflow based primitives until the simulation-based primitives are up-to-speed and as performant as the previous simulators.
With these primitives, researchers & co. can already update their code to the primitive workflow and easily switch to a session execution model for backend,
without sacrificing performance.
Yes, check out the examples/benchmark.py which compares 500 expectation value calculations on a shallow 10-qubit circuit. The results are:
Opflow primitive:
1.928851842880249 # <-- in this repo
Reference primitive:
3.620875120162964
Aer primitive:
91.24100494384766