# Why is local qasm simulation taking so long for VQE?

I've successfully run the $$LiH$$ VQE simulation detailed in Simulating Molecules using VQE using the statevector_simulator, however when attempting to run the same simulation on the quantum_instance(detailed in the same section) using the NoiseModel for ibmq_manhattan the simulation seems to run indefinitely without yielding results.

Is it expected that the quantum_instance simulation would be significantly longer ($$>100\times$$) than the statevector_simulator simulation?

Note: I'm using the following optimizer and variational form:

optimizer = SPSA(maxiter=100)
var_form = EfficientSU2(qubitOp.num_qubits, entanglement="linear")