t2 = trace_events.createTracing({ categories: ['node.perf'] });
const t3 = trace_events.createTracing({ categories: ['v8'] });

t1.enable();
t2.enable();

console.log(trace_events.getEnabledCategories());
</code></pre>
      </div>
    </div>
  </div>
  <script src="data:application/javascript;base64,LyoKU0hKUyAtIFN5bnRheCBIaWdobGlnaHRpbmcgaW4gSmF2YVNjcmlwdApDb3B5cmlnaHQgKEMpIDIwMDcsIDIwMDggZ25vbWJhdEB1c2Vycy5zb3VyY2Vmb3JnZS5uZXQKTGljZW5zZTogaHR0cDovL3NoanMuc291cmNlZm9yZ2UubmV0L2RvYy9ncGx2My5odG1sCiovCgppZi