More than year ago we implemented first version of Scala Worksheet. It had convenient interface, but it was possible to make coffee, while worksheet would finish evaluation, so it was almost unusable.
Now, in Scala plugin of versions 0.30.383 and 0.32.550, Scala Worksheet supports almost instant evaluation (don’t forget to use Ctrl + Alt + W shortcut):
Additionally your evaluation results will be saved even on the IDE restart until you will clean it or re-evaluate.
We are also planning to add highlighting for the output, so any suggestion are welcome as it’s not obvious how to do it.