I've done some benchmarking today with eZ publish CMS and MySQL running a process inserting articles (objects) into the CMS system. I ran the test on both the standard GCC compiled version of MySQL and the Intel ICC compiled version. The total process was 11.9% faster and the MySQL part was 20.2% faster. So atleast on heavy write operations the ICC compiled version of MySQL is running faster with eZ publish. This is good news for people running write intensive eZ publish sites. When testing with read queries I did not see that much of a difference, I will do more tests on heavy read intensive operations to find where we can gain performance also here.