Alignment speed vs accuracy (in terms of number of aligned images)

[jenkinsm]

I was wondering about these attributes that affect alignment. I want to make sure I am using all the best settings to get the highest number of aligned images in a single alignment operation, while still being reasonably fast.

1) Focal Length - Will I get a higher number of correctly aligned photos by entering the 35mm focal length (in my case, 16mm) or by leaving it blank so Metashape can estimate it? And how does this affect speed?

2) Capture distance - Same as above - will I get a higher number of correctly aligned photos by entering the capture distance? And how does this affect speed?

3) Rolling shutter compensation - I know this slows down alignment. But does it affect the number of correctly aligned photos? And/or does it affect the quality of the resulting mesh?

Thanks in advance!