For some reason I tried to load myhouse.pk3/house.wad with dsda-doom. After removing the "Multiple polyobjs in a single subsector" error, dsda-doom was able to load the level. It is completely broken, but who cares. The problem is that it takes about 90 seconds to load.
Quick checked GZDoom and tried "KnownPolySides" optimization from there and loading time reduced from 90 to 3 seconds
For some reason I tried to load myhouse.pk3/house.wad with dsda-doom. After removing the "Multiple polyobjs in a single subsector" error, dsda-doom was able to load the level. It is completely broken, but who cares. The problem is that it takes about 90 seconds to load.
Quick checked GZDoom and tried "KnownPolySides" optimization from there and loading time reduced from 90 to 3 seconds
https://www.doomworld.com/forum/topic/134292-myhousewad/
https://github.com/andrey-budko/dsda-doom/commit/1fd4beaf096c668ecb060d66f27a0a045f158f8b
dsda-doom house.wad -warp 1 -vidmode 8 -quiet