Excessive memory usage when indexing large directories (.devenv)

[rferrandop]

Hi! I am using jdtls with Neovim via the nvim-jdtls plugin. I also use Nix with devenv, which creates a .devenv folder in the project root containing many symlinked files. This causes jdtls to consume excessive memory and significantly increases project indexing time.

Is there a way to exclude specific folders from being processed by jdtls? I imagine this same issue affects projects with large node_modules/ directories or other dependency folders that shouldn't be indexed.

[rferrandop]

I found a solution that works but still needs manual intervention on each project.
Basically in the .project file of the project, I added a new filter on <filteredResources>:

<filter>
	<id>1</id>
	<name></name>
	<type>30</type>
	<matcher>
		<id>org.eclipse.core.resources.regexFilterMatcher</id>
		<arguments>\.devenv</arguments>
	</matcher>
</filter>