Sean, the difference may also arise from the difference it the test methodology.
We've tried to test a real-world case, so we ran the tests over LAN like a client-server application (as we know the use of the network interface has also slowed down). Otherwise the test logic is simple: - we have a databases filled up some test data - at every test we - start one or two (e.g. lock test) transaction(s) - prepare some test data if needed (insert new data, update the existing one, or sometimes delete, or leave the database as is) - run the business logic (insert/update data (sometimes over views) or run stored procedures) - check the expected result (compare table lines, or sp's resultset) - end at the and the test system DOES ROLLBACK (this is a very stange point, not a "normal" usage, but we count on the starting database at next time...) I'm 100% sure this is not a general test procedure, which maybe was run on PostgreSQL. András -----Original Message----- From: Leyne, Sean [mailto:s...@broadviewsoftware.com] Sent: Wednesday, January 10, 2018 4:26 PM To: For discussion among Firebird Developers <firebird-devel@lists.sourceforge.net> Subject: Re: [Firebird-devel] Meltdown and Spectre András, > -----Original Message----- > From: Omacht András [mailto:aoma...@mve.hu] > Sent: Wednesday, January 10, 2018 9:08 AM > finally we choose the easiest way, backup the system and update it to > Debian SID. > > # uname -a > Linux firebirdtest 4.14.0-3-amd64 #1 SMP Debian 4.14.12-2 (2018-01-06) > x86_64 GNU/Linux > > Average running time: 641 secs (10 mins 41 secs) > > Average running time on 4.9.0-4: 466 secs (7 mins 46 secs) Average > > running time on 4.9.0-5: 635 secs (10 mins 35 secs) Thanks for re-running your tests. It is most interesting that FB's post-patch numbers show a much larger impact (~36% slower) than the Postgres results (~24%). Sean ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel __________ Information from ESET Mail Security, version of virus signature database 16713 (20180110) __________ The message was checked by ESET Mail Security. http://www.eset.com __________ Information from ESET Mail Security, version of virus signature database 16714 (20180110) __________ The message was checked by ESET Mail Security. http://www.eset.com ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel