TimesTen does not provide a single replication throughput metric. The best way to get a feeling for this is as follows:
While your test workload is running:
1. Monitor the rate of transaction log data generation by running repeated 'ls -l' commands against the transaction log files for the database. With a bit of scripting you could create a script to report this in MB/s.
2. By using the ttRepAdmin -bookmark command (or the ttBookmark builtin procedure) and/or the ttLogHolds procedure you can see if replication is lagging. If it is not then you know that replication throughput is >= log generation rate. If replication is lagging then replication throughput is < log generation rate.