Scala

To use drip with Scala, first you need to download Scala:

curl http://www.scala-lang.org/downloads/distrib/files/scala-2.9.2.tgz > scala-2.9.2.tgz
tar xzf scala-2.9.2.tgz
cd scala-2.9.2

Then set the JAVACMD environment variable:

export JAVACMD=drip

Now you can run code like this:

bin/scala -e 'println(4 * 5 * 6 * 9)'

Or start a repl:

bin/scala

Performance

Drip cuts the startup time of Scala roughly in half. Not bad, but there is likely more optimization that can be done here. A better default value for DRIP_INIT may help.

$ drip kill
$ time bin/scala -e 'println(4 * 5 * 6 * 9)' # 1080
real    0m1.091s
user    0m0.666s
sys     0m0.085s
$ time bin/scala -e 'println(4 * 5 * 6 * 9)' # 1080
real    0m0.498s
user    0m0.059s
sys     0m0.064s