Java -> Rust thoughts

I was wondering if there's been any talk at Elastic about migrating some of the codebase for Elasticsearch to a language other than Java. In my opinion, Rust would be a perfect language to use for something like Elasticsearch and would give many performance / cost / safety benefits to it.

There's been a lot of progress with the Rust language and there is already a Lucene competitor written in Rust that looks pretty popular. It would be awesome to think about being able to install Elasticsearch without Java and ran as a simple Rust binary with all the performance benefits!

I know that's a pipe dream at the moment, but what about beginning to replace certain parts of it with Rust?

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