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When performing gradient descent on a large data set, which of the
following batch sizes will likely be more efficient?
The full batch.
Computing the gradient from a full batch is inefficient. That is,
the gradient can usually be computed far more efficiently (and just
as accurately) from a smaller batch than from a vastly bigger full
A small batch or even a batch of one example (SGD).
Amazingly enough, performing gradient descent on a small batch
or even a batch of one example is usually more efficient than
the full batch. After all, finding the gradient of one example
is far cheaper than finding the gradient of millions of examples.
To ensure a good representative sample, the algorithm scoops up
another random small batch (or batch of one) on every