# Implementation Details *Unity glTFast* uses [JsonUtility](https://docs.unity3d.com/ScriptReference/JsonUtility.html) for parsing, which has little overhead, is fast and memory-efficient (See ). It also uses fast low-level memory copy methods, the [C# Job System](https://docs.unity3d.com/Manual/JobSystem.html), [Mathematics](https://docs.unity3d.com/Packages/com.unity.mathematics@1.0/manual/index.html), the [Burst compiler](https://docs.unity3d.com/Packages/com.unity.burst@1.6/manual/index.html) and the [Advanced Mesh API](https://docs.unity3d.com/ScriptReference/Mesh.html). ## Trademarks *Unity®* is a registered trademark of [Unity Technologies][unity]. *Khronos®* is a registered trademark and *glTF™* is a trademark of [The Khronos Group Inc][khronos]. [khronos]: https://www.khronos.org [unity]: https://unity.com