•Fast response times are less than this - Consider link checking response times that are less than this time (in milliseconds) to be 'fast'. This default is 1000 (1 second).
•Slow response times are greater or equal to this - Consider link checking response times that are greater or equal to this time (in milliseconds) to be 'slow'. If a link check response time is considered slow based on this setting then a notification of the slow response time may be generated in the comment field for that link check. This default is 3000 (3 seconds).
NOTE: Response times are estimates from when the request is initiated to when it is complete. Response times can vary due to many factors including DNS response time, network congestion, server load, number of redirects, SSL overhead (if any), and your computer's load.