Commit 2c130a0d authored by Derek Murray's avatar Derek Murray Committed by TensorFlower Gardener
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Improve the latency of small `tf.concat()` operations. 

Avoid copying each input `Tensor` object from the `OpInputList`, and
instead take a const reference. This avoids the need to run the
`Tensor` destructor at the end of each iteration.

PiperOrigin-RevId: 203326683
parent 9103612c
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