in lib/main.ts [103:112]
private _emitUsage(interval: number) {
if (this._resourceProfiler) {
this.emit("usage", this._resourceProfiler.read());
}
if (this.enabled) {
// Stop timer when disabled
this._handle = setTimeout(this._emitUsage.bind(this, interval), interval);
this._handle.unref();
}
}