1.1.3 is nice, compile time with JRebel reduced from 10 seconds to around 3.5 seconds which is a huge improvement!

janvladimirmostert: Wonder if Kobalt can match that level of build performance.

Keen to try out Kobalt at some point, just haven't had the time to do do. Also not sure how JRebel will be affected when switching build systems.

If Kobalt provides very short build times as the owner has claimed then there won't be any need for JRebel.

There still is if your application does a gazillion things at startup like setting up test data, dropping and recreating its test database, etc I've got some legacy java + spring project which takes around a minute to startup, so I'll keep Jrebel around even if it's just for that.