There are three main ways to access the contents of objects in AS3: the dot (.) operator, the index ([]) operator, and the in operator. The first two are well known and functionally-equivalent because obj.property evaluates to the same value as obj["property"]. The in operator is different as I’ve described before: it returns a Boolean indicating whether or not the object has the given property. There are a lot of cases—error checking, for example—where we only care if an object has a property and not what that property is. So, can we improve performance by using the is operator rather than the index or dot operators? (UPDATE: hasOwnProperty results added)
Posts Tagged array
Accessing Objects
Oct 18
String Conversion
Apr 30
It struck me recently that there are a lot of ways to convert variables of many types to a the String type. The ease of doing this is one of AS3′s strengths over languages where it’s error-prone, possibly insecure, and just plain difficult. The C language is the most obvious example of this and, since then, seemingly every language has enshrined string conversion in ways ranging from global String() functions (AS3) that take any variable to adding toString() to the base Object type (Java, AS3, others). AS3 seems to have chosen “all of the above” and there are now many ways to convert to a string. Below I’ll look at them from a performance standpoint and see if the everyday, run-of-the-mill boring string conversion can be improved by choosing one option over another.
The Size of Empty
Apr 20
I was reminded about the flash.sampler API by Grant Skinner’s recent post about it. While only available in the debug player, it can still tell us some valuable information about what goes on in the release player. Today I’m using the getSize function to find out how much memory overhead various classes impose, even when they are empty.
Array vs. Vector Part II
Mar 23
Today’s article is in response to some interesting comments on the previous article comparing Array‘s performance to that of Vector. Today I’ll test different types of Vectors and the performance of deleting elements.
Array vs. Vector
Mar 18
Amazingly, I’ve never done a straight shootout between Vector and Array on this site. It’s a simple test, so read right on to see what kind of added performance you can get by using Flash 10′s Vector.
