iphone - Whats more efficent Core Data Fetch or manipulate/create arrays? -
I have a core data application and I would like to get results from DB based on some parameters. For example, if I only want to catch the events that took place in the last week and the events that took place in the last month. Is it better to fetch it for the whole unit, and then work with that result array, it is better to create arrays out of each position, or to use better predictions, and to fetch more?
The answer depends on many factors. I want to describe the description of the documentation. If you use the SQLite store type, for example, it is more efficient to use the date range and to bring only those people in the given category. On the contrary, it is said that you use a non-standard feature such as looking for a substring in the encrypted string - you have to draw everything, decrypt the strings, do your searching, and have to note the matches.
At the end of the spectrum, you have a binary store type, which means that the whole thing will always be dragged into memory, regardless of which type of feta you can be.