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Loop Performance: Part 4

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Today’s article takes a break from the iterator series to investigate an interesting anomaly with the List.ForEach function: it’s surprisingly fast! So fast that it’s actually competitive with regular old for, foreach, and while functions. How can it be so fast when it has to call a delegate that you pass it for every single loop iteration? Read on for to find out!

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Loop Performance: For vs. Foreach vs. While

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Today’s article expands on the previous loop test article to find out which kind of loop is truly fastest. Read on to find out!

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For vs. Foreach

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foreach loops are really convenient, but are for loops faster? It’s a simple question, but one that has really wide implications in almost any codebase. Today’s article tests them out to see which is faster for looping over arrays and Lists. Read on to see which is quicker!

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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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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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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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