import { performance, PerformanceObserver } from "node:perf_hooks";

const obs = new PerformanceObserver((items) => {
  console.log(items.getEntries()[0].name, items.getEntries()[0].duration);
  performance.clearMarks();
});

// obs.observe({ type: "measure" });
obs.observe({ entryTypes: ["measure"] });

performance.mark("A");
{
  await new Promise((res, _) => {
    setTimeout(() => {
      res(0);
    }, 10);
  });
}
performance.mark("B");
performance.measure("A to B", "A", "B");