Dimitri KRAVTCHUK nous démontre, avec une batterie de tests, les évolutions en matière de performance apportées par MySQL 5.4:

• Huge performance improvement on InnoDB engine!
• MySQL 5.4.0 /Perf Version seems to be the most performant InnoDB implementation for the moment! (only except on the Read-Only workload @8cores where InnoDB plugin-1.0.3 is leading!)
• MySQL is outperforming PostgreSQL on my tests now!
• Regarding scalability, get a look at 8 vs 16 cores graphs, and you’ll see it’s the big step forward – no performance degradation on 16 cores is a very positive sign! and there is only 3 months distance between tests!
• LOCK_open needs a fix ASAP!
• Analyzing my test results, it’s too early to say …