I'm running the class scala.tools.nsc.MainGenericRunner (better known as the scala console) under scala version 2.10.4
The -help flag outputs the following:
On the web I sporadically see another option -Yrepl-sync. Is this option still valid? What does it do? Why is it not listed with the rest of the -help content?
Best How To :
That setting is no longer used. It looks like 2.10.4 still uses it to init the compiler while you wait.
REPL always tries to initialize the compiler on a separate thread so you don't twiddle your thumbs.
Here is the copious "illusion of snappiness" comment: