btw, @-autocompletion is uber laggy in current /develop (chromium 65.0.3325.181). The whole tab freezes for several minutes(!) each time I type a character after @.

https://matrix.to/#/!cURbafjkfsMDVwdRDQ:matrix.org/$1522093844183mGHKc:intelfx.name

I've also reproduced this to the point of chrome giving me the sad folder of OOM.