IntelliJ IDEA probably is still your best option. There are some optimisations for large projects like setting your usual -Xmx, -Xms and MaxPermSize JVM paramet

IntelliJ IDEA probably is still your best option. There are some optimisations for large projects like setting your usual -Xmx, -Xms and MaxPermSize JVM parameters: https://crankingcode.wordpress.com/2009/10/13/handling-large-projects-with-maven-and-intellij-idea/ https://crankingcode.wordpress.com/2009/10/13/handling-large... Additionally, idea.jars.nocopy=true can be useful to reduce the number of files that are written to the disk.