[draven]

I work on Scala projects. Adding a log means stopping the service, recompiling and restarting. For projects using Play (the biggest one is one of them) that means waiting for the hot-reload to complete. In both cases it easily takes at least 30s on the smallest projects, with a fast machine. With my previous machine Play's hot reload on our biggest app could take 1 to 3mn.

I use the debugger in Intellij, using breakpoints which only log some context and do not stop the current thread. I can add / remove them without recompiling. There's no interruption in my flow (thus no excuse to check HN because "compiling...")

When I show this to colleagues they think it's really cool. Then they go back to using print statements anyway /shrug

[norir]

This reminds me why I abandoned scala. That being said, even a small sbt project can cold boot in under 10 seconds on a six year old laptop. I shudder to think of the bloat in play if 30 seconds is the norm for a hot reload.