done by mid function hooking a function in steamclient.dll
the function appears to be setting the appId of the new controller bindings
inject/hook right after the target launched
switch focus -> binding gets changed to shortcut bindings -> hook function grabs appid
hook function replaces desktop-config appid with the one grabbed everytime steam tries to active desktop-config
glosc_gamelauncher unloads dll when the target closes; unloading dll patches steamclient.dll back to original
this significantly reduces input-lag while keeping cpu usage at a minimum
also removed any of the vsync / framerate options as we now always render the overlay with 60fps
this reduces cpu usage and unnecessary overhead if playing with the default option of vsync on high refresh rate displays
