https://github.com/prooph/pdo-event-store/blob/541fc4dc28f98d6d6d94f4f18d8dd00da4d267cf/src/Projection/GapDetection.php#L39 defines the time to sleep in ms. But when the sleep is actually called, a `usleep` is used. https://github.com/prooph/pdo-event-store/blob/541fc4dc28f98d6d6d94f4f18d8dd00da4d267cf/src/Projection/PdoEventStoreReadModelProjector.php#L519 So this should be multiplied by a factor 1000