Hi,

We are running Firebird Performance tests everyday (using oltp-emulation test), for 2.5 SC and 3.0 SS respectively:
http://ib-aid.com/en/logs-2-5/
http://ib-aid.com/en/logs-3-0/

These tests are running to catch fluctuations from one build to another, but they also show that 3.0 SS is 20-25% better than 2.5 SC.

Keep in mind that test is designed to simulate parallel write load.

Regards,
Alexey Kovyazin
IBSurgeon
www.ib-aid.com