Selfhosted

Hello, I'm looking for a good tool to selfhost some kind of location history similar to Google's one. To have some data I can test the tools with, I merged every of my bicylce and hiking tours to one GPX file containing 7000km worth of travel. Then I tried this tool, but it really lags with so much data and every move and every zoom takes some seconds to load. Next I tried the "Phonetrack" app on my nextcloud instance, but this as well lags and I have to activate every track manually and they are color coded. I really like the connection between the phonetrack app on my Android and the nextcloud app, but I am afraid that I'll eventually run into the same performance problem when I gathered enough data. I've seen that theres OwnTracks, but it seems you have to set up your own server and I don't want to pay extra next to my nextcloud subscription. Do you know of any kind of location history tool I can use that can handle big amounts of data?

EDIT: I now found a solution I'm very happy with: I still use the Phonetrack app with my Nextcloud and komoot to track my biking/hiking tours. I found a python program that downloads all my komoot tours (https://github.com/ThePBone/KomootGPX) in a folder on my Linux Desktop. I also mounted my nextcloud to my Linux filesystem, so I'd have access to the Phonetrack exports. I wrote a Java program that takes all the gpx files and converts them to a JSON file similar to the original Google Location History JSon file. That all happens automatically once in a week with an anacronjob. Finally I use this tool (https://github.com/theopolisme/location-history-visualizer) to visualize all the data. I've not run into performance issues with this unlike with the other apps I tried. I plan to change this program so I don't have to got through the steps with selecting the file, etc. but this is my current implementation that I'm very happy with. Just leave me a message if you need my Java file to achieve the same :)