| Re: [eclipse-incubator-e4-dev] Interesting article on modelling with prototype-based leanings |
Hi Markus, > I once did some calculations for a simple Hashmap implementation versus > just using instance variables. See my old blog > at http://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5163 interesting post. EMF is something in between. If you use generated classes (fixed properties), the overhead is 4 additional object attributes. In case of dynamic EMF you are much better than using HashMaps, because the attributes are stored in an array and the key (IStructuralFeature) has an index into that array (I am sure Ed can give some numbers here). So, with EMF you have the choice between dynamic and fixed properties and you can mix both approaches..... Unfortunately EMF is not good at delegating non existing properties to another instance. Just two weeks ago I worked with a colleague on an extension of EMF that allows this (in fact it adds a kind of aspects (AOP) to EMF that allows interception of the set/get methods). > http://steve-yegge.blogspot.com/2008/10/universal-design-pattern.html Pretty interesting article but quite long -- I started reading but after 30 min I decided to "fast read" the rest... Michael
Hi all,I agree that's an interesting post. But Steve IMHO doesn't point out that the main problem with this approach is that it can have a high memory overhead. I once did some calculations for a simple Hashmap implementation versus just using instance variables. See my old blog at http://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/5163Regards, MarkusOn Mon, Oct 20, 2008 at 5:44 PM, Simon Kaegi <Simon_Kaegi@xxxxxxxxxx <mailto:Simon_Kaegi@xxxxxxxxxx>> wrote:http://steve-yegge.blogspot.com/2008/10/universal-design-pattern.html _______________________________________________ eclipse-incubator-e4-dev mailing list eclipse-incubator-e4-dev@xxxxxxxxxxx <mailto:eclipse-incubator-e4-dev@xxxxxxxxxxx> https://dev.eclipse.org/mailman/listinfo/eclipse-incubator-e4-dev ------------------------------------------------------------------------ _______________________________________________ eclipse-incubator-e4-dev mailing list eclipse-incubator-e4-dev@xxxxxxxxxxx https://dev.eclipse.org/mailman/listinfo/eclipse-incubator-e4-dev