If it's tor like, then it'll be slow in the same way tor is slow, not due to the small network but due to the anonymisation logic, the multi hop obfuscation, that is inherintly slow.
I feel the issue with a multi location search function being built into a client makes said client a defacto pirating tool, this a target for take down orders, whereas a torrential client without that feature can be used for genuine uses and thus can't be subject to take downs in the same way.
Years ago I used a client that had the search in, but it disappeared long ago... Talking 15+ years ago though