# wantsLowLatencyEventDispatch A Boolean value that determines whether the UI update link requests dispatch of low-latency eligible events. ``` var wantsLowLatencyEventDispatch: Bool { get set } ``` ## Discussion By default, the value of this property is , which means dispatch for events that are eligible for low-latency is off. Set the value to to request dispatch of low-latency eligible events. Only pencil events are low-latency eligible, so this behavior is primarily useful for pencil-drawing or writing apps. Low-latency eligible events dispatch in the middle of a UI update. This timing gives an app half the amount of time to handle them as standard events. Check the value of [`completionDeadlineTime`](/documentation/UIKit/UIUpdateInfo/completionDeadlineTime) for the precise completion deadline time. > Important: > If you opt in to this behavior, keep the complexity of the code you use to handle these events to a minimum. When an app requests low-latency event dispatch, but doesn’t optimize event-handling code, frames don’t submit for presentation in time. Dropped frames cause hitches and provide a suboptimal user experience. If you request dispatch of low-latency eligible events, make sure to profile your app thoroughly. For more information, read . --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)