[Home](./index.md) > [puppeteer](./puppeteer.md) > [Metrics](./puppeteer.metrics.md) ## Metrics interface Signature: ```typescript export interface Metrics ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [Documents?](./puppeteer.metrics.documents.md) | number | (Optional) | | [Frames?](./puppeteer.metrics.frames.md) | number | (Optional) | | [JSEventListeners?](./puppeteer.metrics.jseventlisteners.md) | number | (Optional) | | [JSHeapTotalSize?](./puppeteer.metrics.jsheaptotalsize.md) | number | (Optional) | | [JSHeapUsedSize?](./puppeteer.metrics.jsheapusedsize.md) | number | (Optional) | | [LayoutCount?](./puppeteer.metrics.layoutcount.md) | number | (Optional) | | [LayoutDuration?](./puppeteer.metrics.layoutduration.md) | number | (Optional) | | [Nodes?](./puppeteer.metrics.nodes.md) | number | (Optional) | | [RecalcStyleCount?](./puppeteer.metrics.recalcstylecount.md) | number | (Optional) | | [RecalcStyleDuration?](./puppeteer.metrics.recalcstyleduration.md) | number | (Optional) | | [ScriptDuration?](./puppeteer.metrics.scriptduration.md) | number | (Optional) | | [TaskDuration?](./puppeteer.metrics.taskduration.md) | number | (Optional) | | [Timestamp?](./puppeteer.metrics.timestamp.md) | number | (Optional) |