Comment by bflesch

Good explanation. That's most likely the reason for it.

At the same time it's what I don't like with most modern search functions: they won't allow you to search for exact words or sentences. It doesn't work on google, last time I played around with elasticsearch it didn't work, and it happens in many other places.

Obviously if you want performance you need to group common words and ignore punctuation. But if you're doing code search for actual strings (like on github) it's a totally different problem.

Would be nice to have a google-like search index that you can query with regexp.