Posts Tagged loops

From AS3 to C#, Part 15: Loops, Casts, and Operators

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As with types and variables, there is a lot of subtlety in the differences between AS3 and C# when it comes to loops, casts, and operators. As core parts of the language, it’s important that we know all the little details of our most fundamental tools. Read on to learn what they have in common, what new operators C# offers, and what operators C# doesn’t have.

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Bytecode Analysis: Why do-while Is so Slow

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The do-while loop is slower than the for and while loops… at least in Flash. Why? Today’s article digs into the bytecode the compiler generates for a variety of these loops to find out why.

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Amazing Lookups Optimization

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Today’s article is about an unintuitive-yet-simple optimization you can use to hugely increase the speed of reading from Array, Vector, Dictionary, Object, and dynamic classes. Need I say more? Read on for this amazing speedup!

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Loops With int and uint

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AS3 has two integer types: int and uint. In my experience, most AS3 programmers just use int everywhere and ignore uint. This is usually acceptable as the need for unsigned integers is rare compared to their signed counterparts. However, there are significant performance differences between the two. Read on for the impact of uint on your loops. The original version of this article’s performance test contained a small-but-critical error that led to a lot of incorrect analysis and results. This version of the article has been corrected.

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For Vs. While Revisited

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I wrote an article last November titled For Vs. While that needs a bit of updating an expanding today. While I updated the performance figures in my series on Flash 10.1 performance, I continue to get questions in the comments section of the original article that explore new areas. So today we’ll look at the ubiquitous for and while loops a little more.

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For Vs. While

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I’ve recently been seeing more and more usage of while loops by those who I presume are interested in performance. I’ve always assumed that these was not faster than for loops, but today I am finding out.

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Loop Speed

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AS3 gives you a good number of potential ways you can loop over collections. When Flash Player 10 first came out, I went ahead and tested out the new Vector class in a variety of ways. One of them was to pit it against the collections available in Flash Player 9: Array, Object, Dictionary, ByteArray, and even BitmapData. Below I’ll show you my test and discuss its results.

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Changing Arrays Midstream

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I often wonder about language features that I know have a lot going on behind the scenes. In AS3, this commonly has me wondering about the for-in and for-each loops, which I use frequently. This article is about what happens to those loops when you change the array you’re iterating over during the iteration.

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Flexible Loop Syntax

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First things first: this might be a bug in MXMLC. It sure did cause a bug in my program though! Read on for the stupid mistake that had me scratching my head.

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Loop Safety

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This is a curiosity I’ve had for far too long. Why didn’t I make these simple tests years ago when I was first learning AS3? I’m not sure, but judging by a lot of other people’s AS3 that I’ve read, many people don’t seem to understand it.

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