Stop watch in dart

stop_watch.dart

import 'dart:async';

void main() async {
  var stopWatch = Stopwatch();

  stopWatch.start();

  await Future.delayed(const Duration(seconds: 2), () {});

  stopWatch.stop();

  // Retrieve milliseconds from the Duration object
  var elapsedMilliseconds = stopWatch.elapsedMilliseconds;

  print('Elapsed time in milliseconds: $elapsedMilliseconds');
  
  // or just get duration in seconds
  var elapsedSeconds = stopWatch.elapsed.inSeconds;
  print('Elapsed time in seconds: $elapsedSeconds');
  
}