Posts Tagged int

String-Sortable Integers

Tags: , , ,

Strings and integers sort differently. Unfortunately, this became a problem for me during some recent experiments with Starling. It could be a problem for you too in a variety of situations. Today we’ll look at a workaround I’ve developed to solve this problem, which isn’t nearly as straightforward as you might think.

Read the rest of this article »

7 Comments

Maps With Int Keys: Array vs. Dictionary

Tags: , , , , , ,

Behind the scenes Array holds its values in two ways: a densely-packed array at the beginning and a sparsely-packed map after that. This means it can be used as a map where the keys are indexes and not take up a huge amount of wasted space. Dictionary can also have int keys. Which is faster? Today we’ll find out!

Read the rest of this article »

7 Comments

Converting Numbers to Ints

Tags: , , , , , ,

This is an extremely common task: converting a Number to an int. There are a lot of ways to do it, but which is fastest in AS3? Today we’ll look at a performance test app that attempts to find the fastest way to accomplish this. The answer just may surprise you!

Read the rest of this article »

14 Comments

Faster Math.abs

Tags: , , ,

Math.abs is a commonly-used utility function for taking the absolute value of a Number. However, there’s no special-case version for taking the absolute value of an int. Of course Math.abs will work for int values, but we can do it faster. Read on for a couple of ways.

Read the rest of this article »

18 Comments

Vector vs. ByteArray

Tags: , , , , , ,

Which is the fastest way to store data: Vector or ByteArray? Given that you can upload both types to Stage3D in Flash Player 11, this question has never been more relevant. So which should you use to maximize your app’s speed? Read on for the performance testing.

Read the rest of this article »

14 Comments

What is an int?

Tags: , , , ,

If you’re thinking “I know what an int is”, you need to take this little quiz to find out for sure!

Read the rest of this article »

6 Comments

Faster Logic With Bitwise Operators

Tags: , , , , ,

Logical operators are necessary in every app, so it’s unfortunate that they are so slow in AS3. That’s why I was happy to see a potential alternative in a recent comment by Skyboy. Today’s article shows you how to do logic faster by avoiding logical operators (e.g. &&) and using their bitwise (e.g. &) operator counterparts instead.

Read the rest of this article »

25 Comments

Loops With int and uint

Tags: , , , , , , , , ,

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.

Read the rest of this article »

8 Comments

Explicit Type Conversion

Tags: , , , , , , ,

Five months ago I said I’d talked about explicit type conversion. I hadn’t, really. What I talked about before was type casts. A cast changes the type, not the data. Today, I’m actually going to talk about type conversion and show you the costs of converting between all of your favorite types: int, uint, Number, Boolean, String, and even XML.

Read the rest of this article »

4 Comments

Implicit Type Conversion

Tags: , , , , , ,

I’ve talked before about explicit type conversion and used the function-call style (Type(obj)) and the as keyword to accomplish the task. Today, I’m going to talk about implicit type conversion and use—as implicit would imply—no operators at all!

Read the rest of this article »

6 Comments