pgbench -i -s 50 test Two runs of "pgbench -c 10 -M prepared -T 600 test" with 1 sync standby - server configs etc were mailed upthread.
- performance as of commit e148443ddd95cd29edf4cc1de6188eb9cee029c5
1158 and 1306 (avg 1232)
- performance as of current git master
1181 and 1280 (avg 1230,5)
- performance as of current git master with sync-standbys-defined-rearrangement applied
1152 and 1269 (avg 1210,5)
IMO what these tests have shown is that there is no 20% performance difference between the different versions. To determine if there are differences, n should be a lot higher, or perhaps a single one with a very large duration.
pgbench -T 3600:
sync-standbys-defined-rearrangement 1270 tps current git master 1306 tps