qiskit-ibm-runtime
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Explore possible regression in local simulation performance
Describe the bug
A user has noticed a dramatic slowdown in SamplerV2 with FakeSherbrooke:
A demo of ~150 4-qubit circuits has gone from taking a few seconds to over 3 minutes on their machine. Switching to 5-qubit FakeManila speeds this back up.
Multi-threading things taking a long time in a quick timing profile. Transpiler or aer related?
Steps to reproduce
@caleb-johnson may be able to produce one. Otherwise, try something as above.
Expected behavior
Small circuits on a large device are just as fast as those same circuits on a small device.