Long tasksThe longtask performance event type and the PerformanceLongTaskTiming API provides information about tasks that occupy the UI thread for 50 milliseconds or more, a metric for input latency, delayed animations, and other sources of "jank."performancePerformancelimitedhttps://w3c.github.io/longtasks/https://developer.mozilla.org/docs/Web/API/TaskAttributionTimingapi.PerformanceLongTaskTimingapi.PerformanceLongTaskTiming.attributionapi.PerformanceLongTaskTiming.toJSONapi.TaskAttributionTimingapi.TaskAttributionTiming.containerIdapi.TaskAttributionTiming.containerNameapi.TaskAttributionTiming.containerSrcapi.TaskAttributionTiming.containerTypeapi.TaskAttributionTiming.toJSONhttps://nowyoucanuse.com/features--longtasks.html