--- sidebar_label: Metrics --- # Metrics interface #### Signature: ```typescript export interface Metrics ``` ## Properties | Property | Modifiers | Type | Description | Default | | ------------------- | --------------------- | ------ | ----------- | ------- | | Documents | <code>optional</code> | number | | | | Frames | <code>optional</code> | number | | | | JSEventListeners | <code>optional</code> | number | | | | JSHeapTotalSize | <code>optional</code> | number | | | | JSHeapUsedSize | <code>optional</code> | number | | | | LayoutCount | <code>optional</code> | number | | | | LayoutDuration | <code>optional</code> | number | | | | Nodes | <code>optional</code> | number | | | | RecalcStyleCount | <code>optional</code> | number | | | | RecalcStyleDuration | <code>optional</code> | number | | | | ScriptDuration | <code>optional</code> | number | | | | TaskDuration | <code>optional</code> | number | | | | Timestamp | <code>optional</code> | number | | |