Posts Tagged object

How Big Is That Class?

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When you instantiate one of your classes, how much memory does it use? Today’s article tries out a lot of combinations and counts the bytes used. The conclusion is easy to remember and will give you a solid understanding of how much memory your app is using.

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Four Ways to Clean Master Strings

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When I first wrote about master strings I proposed a function that would help to trim them down and potentially save a lot of memory. However, that method still resulted in a string with a master string one longer than it. Ideally, we’d have no master string at all. Since then, three astute readers chimed in with alternate solutions to the problem. Today I put try all three out to see which method does the best job of cleaning master strings.

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Int Keys: Object vs. Dictionary vs. Array vs. Vector

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Given that Object and Dictionary can have int keys and that int keys are faster than String keys, a natural performance test follows: which class is fastest at reading from and writing to those int keys? Is there a difference between the four Vector classes? Today’s article performs just that test and comes up with the answers.

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String Keys vs. Int Keys

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Now that we know you can use int keys with Object, it’s time to test whether or not this is any faster than String keys. Today’s article does just that and also tests int and String keys with Dictionary.

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Using Non-String Keys with Object

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Pop quiz: what’s the difference between an Object and a Dictionary? If you said “Dictionary can have non-String keys”, you bought into a common myth. Today’s article shows the cases where the lowly Object class will use non-String keys whether you like it or not. Read on for the details.

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The Four Vector Classes

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There are four Vector classes in AS3. It seems like there is only one—Vector—and that it supports generics, but that is only an illusion. Today’s article will do some tests to reveal the implications to your app’s correctness and efficiency.

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If-Else Trees vs. Array and Vector

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We’ve seen that if-else trees are way faster than Object, Dictionary, and even switch at key-value mapping, but how do they stack up against Array and Vector? Today’s article puts them to the test and uncovers some unexpected results.

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450x Speed Up Copying Between Collections

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Programming in AS3 invariably involves choosing between various collections: Array, Vector, Dictionary, Object, ByteArray, and so on. What if you need to quickly copy between them? Your choice of collection could result in a 450x slowdown in your app… or a 450x speedup!

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If-Else Trees vs. Objects and Dictionaries

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If-else trees have some of the best performance of any conditional code, including if-else ladders, the ternary (? :) operator, and the switch statement. But how do they stack up against the O(1) lookups that Object and Dictionary offer us AS3 programmers? Today’s article finds out!

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Loop Speed Redux

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AS3 has three kinds of loops—for, for-in, and for-each—but which is fastest? I attempted to answer that question about three years ago, but the article is in dire need of a followup as many version of Flash Player have been released since then and the question is core to our everyday lives as AS3 programmers. So which type of loop is fastest in 2012?

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