d userspace code.</p>
<p>Tracing can be enabled with the <code>--trace-event-categories</code> command-line flag
or by using the <code>trace_events</code> module. The <code>--trace-event-categories</code> flag
accepts a list of comma-separated category names.</p>
<p>The available categories are:</p>
<ul>
<li><code>node</code> - An empty placeholder.</li>
<li><code>node.async_hooks</code> - Enables capture of detailed <a href="https://nodejs.org/api/async_hooks.html"><code>async_hooks</code></a> trace data.
