For example, on this particular print, I set values of 300mm/s for max print speed and 17.5mm^3/s for volumetric and the fastest it's commanded according to Fluidd is 30mm/s, so 1/10th my commanded speed. However, if you enter a non-zero value for Gap Fill, the entire print slows down by a lot. The main issue here is that if you set Gap Fill to 0 with Auto Speed, the print is WAY faster - basically, it seems to obey the maximum limits you set. If we enter a value in for Gap Fill, then Gap Fill is indeed inserted in the print. When using Auto Speed, if Gap Fill is set to 0, it does not print gaps - this may be expected, as mentioned above - setting gap fill to 0 means no gap fill - however this seems weird when we are setting everything else to 0 for Auto Speed. When you are not using Auto Speed, one can set the gap fill speed to 0 in order to not print gap fill, this is a useful option that should not be removed. This appears to mostly work correctly except for gap fill. The tooltip explains, 'when setting other speed settings to 0 PrusaSlicer will autocalculate the optimal speed.' Under 'Print Settings', at the bottom, there's the 'Auto Speed (advanced)' options. I did learn, however, that I guess my printer now has no issue laying down a first layer at 100mm/s.! (Usually I do max 30mm/s for first layer.but anyhow, back to the issue at hand.) I was already curious as to why, for some reason, the Auto-Speed seemed to go much slower than the number I had entered - though I just sped it up during print anyway - but then I tried printing the one without Gap Fill and was suddenly surprised to see it lay down my first layer at a full100mm/s and then continue at almost 300mm/s (which is what I indeed asked it to do, but up until Gap Fill was disabled it had not achieved these speeds) - surprised me that suddenly after my purge it was going way faster than I had expected. I was doing some testing to try and print my fastest Benchy, in doing so, I was trying the Auto Speed (which, other than this issue, seems to work pretty great for me - seems more consistent than simply scaling up the default speeds for each extrusion type) in order to 'go fast,' of course, one of my ideas to save some time was to disable Gap Fill. OS Version: 0 N/A Build 21390 3D printer brand / version + firmware version (if known) Version 2.3.3+win64 Operating system type + version

Super slicer gap fill