linear_quantize_activations taking 90 minutes + on MacBook Air M1 2020

In my quantization code, the line:

compressed_model_a8 = cto.coreml.experimental.linear_quantize_activations(
    model, activation_config, [{'img':np.random.randn(1,13,1024,1024)}]
)

has taken 90 minutes to run so far and is still not completed. From debugging, I can see that the line it's stuck on is line 261 in _model_debugger.py:

        model = ct.models.MLModel(
            cloned_spec,
            weights_dir=self.weights_dir,
            compute_units=compute_units,
            skip_model_load=False,  # Don't skip model load as we need model prediction to get activations range.
        )

Is this expected behaviour? Would it be quicker to run on another computer with more RAM?