[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Profiler](./puppeteer.protocol.profiler.md) > [PreciseCoverageDeltaUpdateEvent](./puppeteer.protocol.profiler.precisecoveragedeltaupdateevent.md) > [timestamp](./puppeteer.protocol.profiler.precisecoveragedeltaupdateevent.timestamp.md) ## Protocol.Profiler.PreciseCoverageDeltaUpdateEvent.timestamp property Monotonically increasing time (in seconds) when the coverage update was taken in the backend. Signature: ```typescript timestamp: number; ```