Performance class
The interface provides access to performance-related information
for the current page. It's part of the High Resolution Time API,
but is enhanced by the Performance Timeline API, the Navigation
Timing API, the User Timing API, and the Resource Timing API.
An object of this type can be obtained by calling the
window.performance read-only attribute.
Note: This interface and its members are available in Web
Workers via WorkerGlobalScope.performance , except where
indicated below. Also, note that performance markers and measures
are per context. If you create a mark on the main thread (or
other worker), you cannot see it in a worker thread, and vice
versa.
EventTarget
Performance
- Implemented types
- Available extensions
- Annotations
-
- @JS()
- @staticInterop
Constructors
- Performance()
-
factory
Properties
- eventCounts → EventCounts
-
Available on Performance, provided by the PropsPerformance extension
no setter - hashCode → int
-
The hash code for this object.
no setterinherited
- interactionCounts → InteractionCounts
-
Available on Performance, provided by the PropsPerformance extension
no setter -
Available on Performance, provided by the PropsPerformance extension
no setter -
onresourcetimingbufferfull
↔ EventHandlerNonNull<
Event> ? -
Available on Performance, provided by the PropsPerformance extension
getter/setter pair - runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- timeOrigin → double
-
Available on Performance, provided by the PropsPerformance extension
no setter - timing → PerformanceTiming
-
Available on Performance, provided by the PropsPerformance extension
no setter
Methods
-
addEventListener(
String type, EventListener? callback, [dynamic options]) → void -
Available on EventTarget, provided by the PropsEventTarget extension
-
clearMarks(
[String? markName]) → void -
Available on Performance, provided by the PropsPerformance extension
-
clearMeasures(
[String? measureName]) → void -
Available on Performance, provided by the PropsPerformance extension
-
clearResourceTimings(
) → void -
Available on Performance, provided by the PropsPerformance extension
-
dispatchEvent(
Event event) → bool -
Available on EventTarget, provided by the PropsEventTarget extension
-
getEntries(
) → Iterable< PerformanceEntry> -
Available on Performance, provided by the PropsPerformance extension
-
getEntriesByName(
String name, [String? type]) → Iterable< PerformanceEntry> -
Available on Performance, provided by the PropsPerformance extension
-
getEntriesByType(
String type) → Iterable< PerformanceEntry> -
Available on Performance, provided by the PropsPerformance extension
-
mark(
String markName, [PerformanceMarkOptions? markOptions]) → PerformanceMark -
Available on Performance, provided by the PropsPerformance extension
-
measure(
String measureName, [dynamic startOrMeasureOptions, String? endMark]) → PerformanceMeasure -
Available on Performance, provided by the PropsPerformance extension
-
measureUserAgentSpecificMemory(
) → Future< MemoryMeasurement> -
Available on Performance, provided by the PropsPerformance extension
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
now(
) → double -
Available on Performance, provided by the PropsPerformance extension
-
removeEventListener(
String type, EventListener? callback, [dynamic options]) → void -
Available on EventTarget, provided by the PropsEventTarget extension
-
setResourceTimingBufferSize(
int maxSize) → void -
Available on Performance, provided by the PropsPerformance extension
-
toJSON(
) → dynamic -
Available on Performance, provided by the PropsPerformance extension
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited