Posts Tagged burst

LINQ-Style Generic Algorithms for Burst

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We’ve seen how to create powerful, Burst-compatible generic algorithms already, but today we’ll take another approach to generic algorithms and implement them in the style of C#’s LINQ. Along the way, we’ll tackle a new challenge by implementing a generic algorithm that allocates a new collection.

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Type-Agnostic Generic Algorithms

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We looked at some generic algorithm examples in the previous article, but they weren’t very generic in one respect: they all required a NativeArray<T>. What if we wanted to make them more generic so they could work on any type of collection? Today’s article shows two ways to do just that!

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How SharedStatic Works

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Burst 1.2 comes with a new feature: SharedStatic<T>. This allows us to write to static variables from within Burst-compiled code like jobs and function pointers. Today we’ll look at how this is implemented by Burst and IL2CPP. We’ll also put them to a performance test to see how fast they are.

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Burst Function Pointers vs. Jobs

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Function pointers aren’t the only way to express a unit of work. Unity’s own job system does just this, albeit in a different way. Today we’ll compare the performance of Burst’s function pointers against jobs themselves!

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Burst Function Pointers vs. Switch Statements

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A couple weeks ago we took a look at the performance of function pointers in Burst. In doing so, we left out an alternative: good old switch statements. Today we’ll put those to the test to see how they stack up next to Burst’s newfangled function pointers!

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DIY Virtual Functions in Burst

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Now that we’ve seen how function pointers work and perform in Burst, let’s use them to build a higher-level feature: virtual functions!

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Burst Function Pointers Performance

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Last week we took a look at function pointers in Burst 1.2 and Unity 2019.3. Today we’ll continue looking into them by analyzing their performance.

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Function Pointers in Burst

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Unity 2019.3 and Burst 1.2 bring us support for function pointers! Behind the scenes, these power everyday C# functionality like virtual and abstract functions, delegates, and interfaces. Today we’ll look at how to use them and what Burst compiles them to.

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Sharing IDisposables

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IDisposable is becoming more and more prevalent in Unity. Previously, it was typically only used for I/O types like FileStream. Now it’s used for in-memory types like NativeArray<T> to avoid the garbage collector. Needing to call Dispose manually means we’re explicitly managing memory, just like we’d do in lower-level languages like C++. That comes with some challenges, especially with shared ownership, which we’ll deal with today.

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NativeArray2D

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Unity provides exactly one collection: NativeArray<T>. Compared to managed arrays in C#, these must be one-dimensional. So today we’re building a two-dimensional version of it: NativeArray<T>. We’ll add this to the NativeCollections GitHub repository for easy inclusion into any project. Read on to learn more about the collection!

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