So I've been a faithful clementine user since 2013 because it's FOSS with out of the box flac support, works on both windows and linux, and has a android remote.
As my library has bloated with more and more EDM FLAC,. I've noticed the app becoming less responsive, especially when searching. I have a Ryzen 7 and an NVME SSD, and my RAM usage never went above 60% so I don't think it's a hardware limitation.
I vowed never to muck about with processor priority after breaking things once before.
Can someone recommend an app that has snappy search even with 300gb+ libraries loaded in its search function?
So is your issue that the search within the app itself is whats getting slow?
If so it may sound counterintuitive but I wonder if a search indexing software would help at all? Maybe something like Everything from VOID tools or Listary.
I believe both of those apps can be set to limit searches by specific file types and then you could just start typing the name of the song, or artist and entries should instantly start popping up.
Then would double clicking the song title from the search app play it in your desired music app?
I know you mentioned needing Linux and Android so this would really only be a solution for Windows OS.