How to reduce Scala (/ Java) startup overhead?

Question

I\'m pretty ignorant of the Java world (I do mostly C / Python) but Scala looked interesting enough to pull me in. One problem I\'m having with it is the enormous startup ov

Answer 1

What sort of computer are you using it on? Obviously there is a JVM startup overhead but this is even greater if the JVM detects you are running on a server-class machine.

In the J2SE platform version 5.0 a class of machine referred to as a server-class machine has been defined as a machine with:

• 2 or more physical processors
• 2 or more Gbytes of physical memory

You can put the JVM in client mode by using the -client option. The client mode is tuned for fast startup time.

There is also the move to modularize the JVM (project Jigsaw) which will improve startup times even more - this has started with JDK 1.6.0_10.