startTracing method
- List<
TimelineStream> streams = const <TimelineStream>[TimelineStream.all], - Duration timeout = kUnusuallyLongTimeout,
override
Starts recording performance traces.
The timeout
argument causes a warning to be displayed to the user if the
operation exceeds the specified timeout; it does not actually cancel the
operation.
For WebFlutterDriver, this is only supported for Chrome.
Implementation
@override
Future<void> startTracing({
List<TimelineStream> streams = const <TimelineStream>[TimelineStream.all],
Duration timeout = kUnusuallyLongTimeout,
}) async {
assert(streams.isNotEmpty);
try {
await _warnIfSlow<vms.Success>(
future: _serviceClient.setVMTimelineFlags(
_timelineStreamsToString(streams),
),
timeout: timeout,
message: 'VM is taking an unusually long time to respond to being told to start tracing...',
);
} catch (error, stackTrace) {
throw DriverError(
'Failed to start tracing due to remote error',
error,
stackTrace,
);
}
}