From discussion: https://github.com/infinispan/infinispan/pull/13156#discussion_r1833476251

With a delete query, it would be nice to send the remove operations concurrently, like two or four at a time. It may help improve performance in a cross-site deployment where the removals are slower than usual (due to site latency).

The proposed solution is adding a new method CompletionStages#performConcurrently that accepts a collector.