Posibility to use the OSM API instead of Overpass
Currently Relatify can take 15 or more seconds to load a relation. This is quite annoying, especially when you have to make minor changes to a few lines (like a new stop/removed stop along the way). I assume that the slow part is because Relatify is using an Overpass instance for fetching the data. Is it possible to instead use directly the OSM API?
Example relations which take a long time to load:
https://www.openstreetmap.org/relation/17554928 https://www.openstreetmap.org/relation/16908459 https://www.openstreetmap.org/relation/16129657
I don't think it's feasible and I don't think it would make any(if) noticeable change. OSM API 0.6 doesn't offer necessary filtering options which would require higher data downloads -- it's all area data or nothing. Not speaking about API 0.6 download rate limitations. I believe OSM-NG and its' API 0.7 will enable necessary filtering capabilities to make such transition beneficial. Let's wait for it.