API Reference > bentleyjs-core > Utils > StopWatch StopWatch Class A StopWatch for timing operations. Methods Name Description constructor(description?: string, startImmediately: boolean = false): StopWatch ctor for StopWatch reset(): void Clear the StopWatch start(): void Start the stopwatch. stop(): BeDuration Stop the stopwatch so that the duration can be viewed later. Properties Name Type Description current Accessor ReadOnly BeDuration Get the elapsed time since start() on a running timer. currentSeconds Accessor ReadOnly number Get the elapsed time, in seconds, since start() on a running timer. description ConstructorProperty undefined | string optional string stored with the StopWatch elapsed Accessor ReadOnly BeDuration Get the elapsed time between start() and stop() on this timer. elapsedSeconds Accessor ReadOnly number Get the elapsed time, in seconds, between start() and stop() on this timer. Defined in core/bentley/src/Time.ts Line 136 Last Updated: 15 June, 2021