Cura 3.1 ironing issue

[eldrick 65]

I'm trying out Ironing in 3.1, and have an issue with it. The print is a solid 4"x8"x1/8" piece with a pattern on top. Printing at conservative speeds, it takes just over 3hrs.5min., while Cura 3.1 estimates 2:50. 

When I make just one change, turning on Ironing with Only Top Layer set, Cura's estimate goes to 4:10, and I'm betting on at least 4:30. The whole print has slowed - everything that was printing at 35mm/sec appears to be running around 20mm/sec. It's all moving veeeerrrry sloooowwwwly through the whole print.

I went back and turned Ironing off again, and the estimate is back down to 2:50 again.

 

Whaaaaat?

[neotko 1,417]

Unhide Ironing speed option and ramp up the speed for it.