Spine runtimes page shows 4.1.2 as latest supported, but 4.1.3 is out. Might address that performance regression showcased in that one other thread.
Support for 4.1.3
Doubt it will do anything re:performance. Just pushed a quick fix to the GitHub workflow to build 4.1.3:
EsotericSoftware/spine-runtimes094d3cb
You can watch this build:
EsotericSoftware/spine-runtimesactions/runs/6878947037
Once it's completed successfully, you can find the latest binaries here:
https://esotericsoftware.com/spine-godot#Installation