Performance of "exists" query

[cweiske]

@nik9000

If you added the documents routing on the URL then you could add the same routing on the query and only hit a single shard. That is fairly similar in concept to using the URL as the document's ID but doesn't have problems with very very long urls.

I tried the routing, but that does not make a difference. I'm also testing on a fairly tiny ES database with 200 documents.

I did not try multisearch yet, but have the feeling that maybe the HTTP request handling (albeit to 127.0.0.1) add most of the query time.
Using keep-alive might solve the problems here.