Once installed on a remote server (same power class) the sync starts fast but then the speed drops until it (nearly) stops. Interestingly the server is not working much.
Server: Debian (wheezy) with couchbase 3.0.1 & own build sync server.
Client: IOS 8.3
We’d need some more details on the nature of the testing you’re doing to understand what might be going on - including what type of replication you’re doing, what your data looks like, and how you’re measuring sync speed.
Also - does ‘own build sync server’ mean you’re building Sync Gateway from the latest on the master branch?
What version of couchbase lite do you use? I had recently a similar problem and finally I’ve found that current stable release was slow because of the SQLite version (iOS >= 8.2 uses 3.8.5 version of SQLite, read more about issue: https://github.com/couchbase/couchbase-lite-ios/issues/487). Updating couchbase to version from repository fixed the problem.