It wasn't Bill that added this. It was first added in 1.2 and then expanded in 1.8, more copying added in 1.10, etc. This whole thing started to create an idiot proof key, which cannot be done. Instead we have a big fat expensive key that is killing performance. Let the user live and die by their ability to code an entity key class.
xxxxxxxxxxxxxxxxxxxxxxxx Scott Stark Chief Technology Officer JBoss Group, LLC xxxxxxxxxxxxxxxxxxxxxxxx ----- Original Message ----- From: "marc fleury" <[EMAIL PROTECTED]> To: "Jboss-Development@Lists. Sourceforge. Net" <[EMAIL PROTECTED]> Sent: Tuesday, November 13, 2001 3:11 PM Subject: [JBoss-dev] CacheKey copy semantics and speed > I am reading the CMR 2.0 code and I see that it makes intensive use of the > CacheKey creation (which I guess is normal). > > In cachekey, the change introduced by Bill, i.e. to enforce copy semantics > is a very slow operation. It involves a full serialization. This has > negative effects. > > 1- it slows the finders > 2- it slows the cmr stuff > 3- thank god it doesn't affect the "normal operation" speed which is the > optimized lookup > > One of the points of the cachekey is to be fast, uber fast by precompiling > the key hashcode to be used and the equals. I understand the problem that > bill was trying to solve with the serialization but it is just too > expensive. > > I want to turn this behavior off by default, Bill if you feel strongly we > could put an optional field so that these keys are copied but by default it > is a killer. > > It must be a property of the cache and I intend to expose more of them > through the JMX interface. In any case it would be a jboss.xml thingy. > > Just being a good boy and following Scott's demand for "tracking" changes, I > fully agree. > > marcf > > > > xxxxxxxxxxxxxxxx > Marc Fleury > President > JBoss Group, LLC > xxxxxxxxxxxxxxxx > > > _______________________________________________ > Jboss-development mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/jboss-development > _______________________________________________ Jboss-development mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/jboss-development
