Typing is slow when worksheet contains huge mixin composition

[Blaisorblade]

Typing in the worksheet (with Scala-IDE 3.0.3) is painfully slow for me — as in, slower than typing over SSH. It was not like this, but I can't pin down when this changed.
Might be related to #112, but I can't really tell.

[Blaisorblade]

Aaah, figured it out!
The worksheet in question contains a line composing almost all mixins for my whole project together.

Moving that line to a method in a separate trait (EDIT: done in inc-lc/ilc-scala@10beab8) makes things much faster — both typing and evaluation of subsequent lines.

It seems more plausible that #112 is involved.

[dragos]

This is most likely a performance problem in the type-checker, and your workaround is a good solution. Another few options:

• add an explicit type to val v =. I believe the type-checker builds a complicated refinement type for that val, every time you type
• upgrade to Scala 2.11.1+, where we have several improvements to the type-checker.