flink/flink-docs-release-1.0/apis/batch/dataset_transformations.html#join-algorithm-hints">[5]</a>.</p>
<h3 id="how-is-flinks-join-performance">
  How is Flink’s join performance?
  <a class="anchor" href="#how-is-flinks-join-performance">#</a>
</h3>
<p>Alright, that sounds good, but how fast are joins in Flink? Let’s have a look. We start with a benchmark of the single-core performance of Flink’s Hybrid-Hash-Join implementation and run a Flink program that executes a Hybrid-Hash-Join with parallelism