XSStrike Metrics: Confidence & Efficiency

This is regarding the xss scanning tool: XSStrike (https://github.com/s0md3v/XSStrike).

The tool produces three elements in a given report:

  1. XSS Payload
  2. Confidence
  3. Efficiency

Does anyone know what the metrics Confidence and Efficiency is measuring? I can hazard a guess that it suggests the likelihood of the payload working however this is not mentioned in the documentation and I wondered someone perhaps had a better understanding.

Unfortunately the answer was not forthcoming on the author’s git repo.