Hello all! I am Betto from Argentina.
I signed up to the forum to reply on this topic as I also noticed a wild difference on the estimate printing time.
Yesterday I printed a knob for my Prusa i3 Hephestos, same stl sliced in Cura 3.4 64bits running in windows 10.
First print was using coarse quality(.4mm height) at 60 mm/s, at 210c for the hotend and 60c the print bed.
I used PLA. ETA in Cura was 15 min. I send it to octoprint from cura(via plugin) and it took 40min to finish the print. I have octoprint setup in a raspberry pi 1 model B.
Next print was on .3mm height, at 40mm/s, same temps and filament. ETA in cura was 27min. It took 33min to finish printing. But this time I saved the gcode in an sdcard and printed directly from the printer with the sdcard.
What could be the issue or explanation of why it took more time to print with octoprint?
I haven't tried with the laptop hooked up.
I will be testing another stl with all same settings, with octoprint, sdcard and laptop.