I really like your idea, one simple feature I would like is just a button or else to simply display a language at random. And out of curiosity, in which language did you code this site ? The filters by paradigm are a good idea. I agree the benchmarks are difficult to find and also sometimes kinda biased, so I think they may be not a good idea to add.

Maybe another feature could be to add a link to google trends.

Anyway, good idea, keep up !