PerformanceObserverEntryList

The PerformanceObserverEntryList interface is a list of peformance events that were explicitly observed via the observe() method.

Note: this interface is exposed to Window and Worker.

Methods

PerformanceObserverEntryList.getEntries(): Returns a list of explicitly observed PerformanceEntry objects based on the given filter.
PerformanceObserverEntryList.getEntriesByType(): Returns a list of explicitly observed PerformanceEntry objects of the given entry type.
PerformanceObserverEntryList.getEntriesByName(): Returns a list of explicitly observed PerformanceEntry objects based on the given name and entry type.

Example

// Create observer for all performance event types
// list is of type PerformanceObserveEntryList
var observe_all = new PerformanceObserver(function(list, obs) {
   var perfEntries = list.getEntries();
   for (var i = 0; i < perfEntries.length; i++) {
      print_perf_entry(perfEntries[i]);
      // do something with it
   }
})

Specifications

Specification
Performance Timeline Level 2 (Performance Timeline 2) # performanceobserverentrylist-interface

Browser compatibility

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