[Home](./index.md) > [puppeteer](./puppeteer.md) > [Page](./puppeteer.page.md) > [\_emitMetrics](./puppeteer.page._emitmetrics.md) ## Page.\_emitMetrics() method Signature: ```typescript _emitMetrics(event: Protocol.Performance.metricsPayload): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | event | Protocol.Performance.metricsPayload | | Returns: void