puppeteer/website/versioned_docs/version-21.3.8/api/puppeteer.page.metrics.md

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Page.metrics

Page.metrics() method

Object containing metrics as key/value pairs.

Signature:

class Page {
  metrics(): Promise<Metrics>;
}

Returns:

Promise<Metrics>

• Timestamp : The timestamp when the metrics sample was taken.

• Documents : Number of documents in the page.

• Frames : Number of frames in the page.

• JSEventListeners : Number of events in the page.

• Nodes : Number of DOM nodes in the page.

• LayoutCount : Total number of full or partial page layout.

• RecalcStyleCount : Total number of page style recalculations.

• LayoutDuration : Combined durations of all page layouts.

• RecalcStyleDuration : Combined duration of all page style recalculations.

• ScriptDuration : Combined duration of JavaScript execution.

• TaskDuration : Combined duration of all tasks performed by the browser.

• JSHeapUsedSize : Used JavaScript heap size.

• JSHeapTotalSize : Total JavaScript heap size.

Remarks

All timestamps are in monotonic time: monotonically increasing time in seconds since an arbitrary point in the past.