"#processfunction-as-a-window">#</a>
</h2>
<h3 id="low-latency">
  Low Latency
  <a class="anchor" href="#low-latency">#</a>
</h3>
<p>Let&rsquo;s start with a reminder of the type of fraud detection rule that we
would like to support:</p>
<p><em>&ldquo;Whenever the <strong>sum</strong> of  <strong>payments</strong> from the same <strong>payer</strong> to the
same <strong>beneficiary</strong> within <strong>a 24 hour
period</strong> is <strong>greater</strong> than <strong>200 000 $</strong> - 