How to speed up grails test execution

Question

While developing a Grails 1.0.5 app I\'m appalled at how slow the grails test-app command is. Even though the actual tests take just ~10 seconds, the whole exec

Answer 1

Increasing the java memory/JVM options can definitely speed things up. The amount of memory you can give depends on your equipment.

If you are running grails from the command line, set the GRAILS_OPTS environment variable. Add something like this to ~/.bash_profile

export GRAILS_OPTS="-Xms3000M -Xmx3000M -XX:PermSize=256m -XX:MaxPermSize=512m"

If you use GGTS(Eclipse) you'll need to add this to the VM arguments of the run configuration.

There are also a few JVM settings that can be modified to increase the speed:

-XX:+UseCodeCacheFlushing 
-XX:MaxInlineLevel=15  
-noverify  (turns off class validation)