kotlin-node/node.perfHooks/PerformanceObserver/observe

observe

fun observe(options: PerformanceObserverObserveTypesOptions)(source)

fun observe(options: PerformanceObserverObserveTypeOptions)(source)

Subscribes the PerformanceObserver instance to notifications of new PerformanceEntry instances identified either by options.entryTypes or options.type:

const {
  performance,
  PerformanceObserver,
} = require('node:perf_hooks');

const obs = new PerformanceObserver((list, observer) => {
  // Called once asynchronously. `list` contains three items.
});
obs.observe({ type: 'mark' });

for (let n = 0; n < 3; n++)
  performance.mark(`test${n}`);

Since

v8.5.0