http://j4dhkkxfcsvzvh3p5djkmuehhgd6t6l7wmzih6b4ss744hegwkiae7ad.onion/en/blog/lacre-test-cancelled
Last weekend, we have unofficially run Lacre on Disroot server. Since all email traffic passes through Lacre regardless whether user uploaded their public key or not, we could observe how Lacre would perform. We were very happy with the results, both under normal everyday "plain text" load as well as when stress-testing with generated encrypted traffic, Lacre performs superb and we are confident it will have minimal impact on server performance.