Table of Contents

Class PerformanceEntry

Namespace
CSharpToJavaScript.APIs.JS
Assembly
CSharpToJavaScript.dll

The PerformanceEntry object encapsulates a single performance metric that is part of the browser's performance timeline.

[Value("PerformanceEntry")]
public class PerformanceEntry
Inheritance
PerformanceEntry
Derived
Inherited Members

Remarks

The Performance API offers built-in metrics which are specialized subclasses of PerformanceEntry. This includes entries for resource loading, event timing, and more.

A performance entry can also be created by calling the Mark(string, PerformanceMarkOptions) or Measure(string, Union158, string) methods at an explicit point in an application. This allows you to add your own metrics to the performance timeline.

The PerformanceEntry instances will always be one of the following subclasses:

See also on MDN

Constructors

PerformanceEntry() 

public PerformanceEntry()

Properties

Duration

The read-only duration property returns a {{domxref("DOMHighResTimeStamp","timestamp", "", "no-code")}} that is the duration of the {{domxref("PerformanceEntry","performance entry", "", "no-code")}}. The meaning of this property depends on the value of this entry's EntryType.

[Value("duration")]
public Number Duration { get; }

Property Value

Number

A Number representing the duration of the {{domxref("PerformanceEntry","performance entry", "", "no-code")}}. If the duration concept doesn't apply for a particular performance metric, a duration of 0 is returned.The meaning of this property depends on the value of this performance entry's EntryType:For the following entry types, duration is not applicable, and in this case the value is always 0:

Remarks

See also on MDN

EntryType

The read-only entryType property returns a string representing the type of performance metric that this entry represents.

[Value("entryType")]
public string EntryType { get; }

Property Value

string

A string. The return value depends on the subtype of the PerformanceEntry object. Some subtypes have more than one entryType.

Remarks

All supported entryTypes are available using the static property SupportedEntryTypes.

-SupportedEntryTypes
-GetEntriesByType(string)
-GetEntriesByType(string)

See also on MDN

Id 

[Value("id")]
public ulong Id { get; }

Property Value

ulong

Name

The read-only name property of the PerformanceEntry interface is a string representing the name for a performance entry. It acts as an identifier, but it does not have to be unique. The value depends on the subclass.

[Value("name")]
public string Name { get; }

Property Value

string

A string. The value depends on the subclass of the PerformanceEntry object as shown by the table below.

Remarks

-GetEntriesByName(string, string)
-GetEntriesByName(string, string)

See also on MDN

NavigationId 

[Value("navigationId")]
public ulong NavigationId { get; }

Property Value

ulong

StartTime

The read-only startTime property returns the first {{domxref("DOMHighResTimeStamp","timestamp", "", "no-code")}} recorded for this PerformanceEntry. The meaning of this property depends on the value of this entry's EntryType.

[Value("startTime")]
public Number StartTime { get; }

Property Value

Number

A Number representing the first timestamp when the
PerformanceEntry was created.The meaning of this property depends on the value of this performance entry's EntryType:

Remarks

See also on MDN

Methods

ToJSON()

The toJSON() method is a {{Glossary("Serialization","serializer")}}; it returns a JSON representation of the PerformanceEntry object.

[Value("toJSON")]
public Object ToJSON()

Returns

Object

A {{jsxref("JSON")}} object that is the serialization of the PerformanceEntry object.

Remarks

-JSON

See also on MDN

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