Here are some resources that you might find helpful:
- Efficiency calculation: Formula for calculation of efficiency
- Power factor: How to measure Power Factor of the "Totem-Pole Bridgeless Boost PFC Converter" demo model? - #2 by Bryan_Lieblick
- Total harmonic distortion: There is both a measurement option built in to the PLECS Scope and a library block that will calculate THD for you.
Let me know if you still have any questions after reviewing these posts.