KiCad version 5 slow to open a project

And this current https://bugs.launchpad.net/kicad/+bug/593962/comments/19 one is another reason cannot use 5.x version yet. The Ratsnet - It lose the ability to allow user to select only a set of nets that are currently interesting while doing the component placement. 5.x change the feature to component base no longer PADs/NET base that struggle me.