Switching back to EXA makes it work, but with the same old performance problems. Still it's possible to make it go faster with a
- Option "MigrationHeuristic" "greedy"
The exa manual page says this about the option:
- Option "MigrationHeuristic" "anystr"
- Chooses an alternate pixmap migration heuristic, for debugging purposes. The default is intended to be the best performing one for general use, though others may help with specific use cases. Available options include "always", "greedy", and "smart". Default: always.