Love this tool. I've sent numerous tickets to support that go unanswered. I've added suggestions to the forums. I am not the only one. Some others experiencing this slow down have gave up waiting for a fix. As I have. Finally making the move after a year. It saddens me.
I used Papaly. It was very good web app, actually still very good. But Papaly has not updated for a long time, and no recent sharing their social accounts. Probably, developer team burned the project.
I used papaly for such a long time and it's a great bookmarking platform. If it had the ability to view the layout in cards and more customization options in general I would still use it but it is still top 5 i've ever used.