IntelliJ 15 Works Slow and eats 1GB of RAM

Question

I just have installed intelliJ IDEA 15 but it's somehow laggy and uses a lot of RAM. Sometimes more than 1GB on my 4GB-RAM laptop. Are previous versions of intelliJ better in performance? How can i make it faster? And another problem I have is with Auto completion and correction. Where are these two settings? Cause it doesn't seem as good as Eclipse.

Solution

Usually if you have performance problems, the first place I would advice is to look at the plugins which are activated, perhaps you don't need those plugins.

File -> Settings -> Plugins

Secondly, intelliJ indexes your files so that all its wonderful searches and short cuts, so, if you have a huge project, the first indexing will take some time.

For tips on auto-completion etc. Take a look at the official docs. https://www.jetbrains.com/idea/help/auto-completing-code.html

Extra Tips
When I started using IntelliJ, I found lot of videos on youtube about how to use it, these tips have helped me get more productive. I don't want to start a debate on Eclipse vs IntelliJ vs Netbeans etc., but each IDE has a vision and a way it was intended to be used, so moving from one to another does need a ramp up time.