tf.keras.ops.vectorized_map

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Parallel map of function on axis 0 of tensor(s) elements.

tf.keras.ops.vectorized_map(
    function, elements
)

Schematically, vectorized_map implements the following, in the case of a single tensor input elements:

def vectorized_map(function, elements)
    outputs = []
    for e in elements:
        outputs.append(function(e))
    return stack(outputs)

In the case of an iterable of tensors elements, it implements the following:

def vectorized_map(function, elements)
    batch_size = elements[0].shape[0]
    outputs = []
    for index in range(batch_size):
        outputs.append(function([e[index] for e in elements]))
    return np.stack(outputs)

In this case, function is expected to take as input a single list of tensor arguments.