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  <div class="admonition note">
<p class="admonition-title">Note</p>
<p>If the following conditions are satisfied:
1) cudnn is enabled,
2) input data is on the GPU
3) input data has dtype <code class="docutils literal notranslate"><span class="pre">torch.float16</span></code>
4) V100 GPU is used,
5) input data is not in <code class="docutils literal notranslate"><span class="pre">PackedSequence</span></code> format
persistent algorithm can be selected to improve performance.</p>
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