title: How do I compare my Query performance in BigQuery?
body: <p>I have complex queries in BigQuery that I can modify to optimize further. (I am using the GCP console to run these queries)
  However, I unable to test if my changes are actually improving the performance.</p>
  <p>I am checking the execution details to understand the performance and I expected &quot;Slot Time Consumed&quot; to be a comparable metric. But the execution details seem to be inconsistent.</p>
  <p>Running the same query twice:</p>
  <p><img src="https://i.stack.imgur.com/FPCnV.png" alt="Run1" /></p>
  <p><img src="https://i.stack.imgur.com/aXMUQ.png" alt="Run2" /></p>
  <p>Is there any other way or a tool I can use to compare query performances consistently over time?</p>