Timeline class Null safety

Add to the timeline.

Timeline's methods add synchronous events to the timeline. When generating a timeline in Chrome's tracing format, using Timeline generates "Complete" events. Timeline's startSync and finishSync can be used explicitly, or implicitly by wrapping a closure in timeSync. For example:

Timeline.startSync("Doing Something");
doSomething();
Timeline.finishSync();

Or:

Timeline.timeSync("Doing Something", () {
  doSomething();
});

Constructors

Timeline()

Properties

hashCode → int
The hash code for this object. [...]
read-only, inherited
runtimeType → Type
A representation of the runtime type of the object.
read-only, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
inherited
toString() → String
Returns a string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator. [...]
inherited

Static Properties

now → int
The current time stamp from the clock used by the timeline. Units are microseconds. [...]
read-only

Static Methods

finishSync() → void
Finish the last synchronous operation that was started.
instantSync(String name, {Map? arguments}) → void
Emit an instant event.
startSync(String name, {Map? arguments, Flow? flow}) → void
Start a synchronous operation labeled name. Optionally takes a Map of arguments. This slice may also optionally be associated with a Flow event. This operation must be finished before returning to the event queue.
timeSync<T>(String name, TimelineSyncFunction<T> function, {Map? arguments, Flow? flow}) → T
A utility method to time a synchronous function. Internally calls function bracketed by calls to startSync and finishSync.