Performance.clearResourceTimings()

The clearResourceTimings() method removes all performance entries with an entryType of “resource” from the browser’s performance timeline and sets the size of the performance resource data buffer to zero.

To set the size of the browser’s performance resource data buffer, use the Performance.setResourceTimingBufferSize() method.

To get notified when the browser’s resource timing buffer is full, listen for the resourcetimingbufferfull event.