Downcast comic how to#

Anyway and in any case you must profile our code first and then try to optimize and fiddle with caching etc. In that case my advice about keeping objects in containers by value might not be that useful or straightforward to implement. UPDATE: as you mentioned below, you probably need to keep the objects in a tree structure for some algorithmic reasons. except for performance (as in your case) there is nothing wrong about storing pointers in STL containers. This is the typical scenario so I assume this is also your case.ītw. And probably only after that you should start with some algorithm fine-tuning. This will give you most speed you can achieve. In your case you will probably need to keep separated your Nodes and Spatials in separated vectors and not by reference or pointer to IEntity but by value (use vector and vector instead of vector) and then traverse it linearly or in a predictable/regular order (to benefit pro data prefetch). This is often implemented using something called 'entity component system', typically in computer games.

Downcast comic how to#

How to do that? Google for 'data driven design' or 'data oriented programming'. You should also try to utilize memory caching as much as possible because memory access to non-cached data is usually the bottleneck of most performance critical code. Secondly, if you aim for performance, you should abandon OOP in the performance critical code. When a Gallery Owner uses to market the artwork they have for sale - and sells a piece of artwork to another collector or site visitor. To fix it in the OOP domain, instead of downcasting you should call a certain virtual function for each your IEntity object which then would do something different for Node and something different for Spatial. It was during Lawrences childhood that comic strips took off as a. Firstly, having to downcast in such a situation is a clear sign of bad design breaking the Liskov principle. closed mouths and a horizontal slash signals downcast eyes and a furrowed brow.