What of $HOME/.IntelliJIdea14 is worth backing up?

As a habit, I backup many configuration files in $HOME.  $HOME/.IntelliJIdea14 boasts hundreds of megabytes.  I wonder if it's a good idea to back up the entire $HOME/.IntelliJIdea14 or could it be better to only back up parts of it.  The main use for this is that if I need to reconsutrct an identical installation, backup of configuration files in $HOME/ sometimes make it easier.

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the directory .IntelliJIdea14/system/index take a lot of megabytes, i think you don't need to backup it, idea will index your project again when you start it.

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You can backup only config and plugins if needed, system folder backup is not needed.

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