[ http://issues.apache.org/jira/browse/DERBY-2050?page=comments#action_12447836 ] Knut Anders Hatlen commented on DERBY-2050: -------------------------------------------
I don't think this should affect memory usage much since the JVM seems to allocate multiples of 8 bytes. I used DTrace to compare the object sizes for one class with 2 ints and one object reference (like CachedItem), and one class with one int, six booleans and one object reference. Both object types used 24 bytes. > Manipulating CachedItems could be more efficient > ------------------------------------------------ > > Key: DERBY-2050 > URL: http://issues.apache.org/jira/browse/DERBY-2050 > Project: Derby > Issue Type: Improvement > Components: Performance > Affects Versions: 10.2.1.6 > Reporter: Dyre Tjeldvoll > Priority: Trivial > Fix For: 10.3.0.0 > > > CachedItem's state is currently recorded in bit fields of an integer > variable. Changing this to 6 boolean member variables reduces cpu usage. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
