[Monetdb-developers] confused by Timer/QueryHistory/CallHistory

Hi, Sorry for bothering you again... I am confused by the time shown in Timer/queryHistory/callHistory. In queryHistory, there are two time: parse time and optimization time. In callHistory, there are two important time: xtime and rtime. These times should not overlap each other. but when I sum up these times, the number is different from the one returned by Timer. I wonder which time should I use for performance test. Thank you very much. -- Thanks, Mo