The absolute fastest way to trim splits and cut poles to length is an H-Frame sawbuck. I just loaded mine up last week with some 4-6ft poles for the first time. Within 2-3 minutes of it being loaded, I had dozens of rounds cut to length, ready to stack or split.
I have a video of me trimming splits with it. It is much faster than even a chop saw to process those in batches as well.
That's a lot of prep to make that one run. Cool none the less.