Updated release notes

Docs/APIChanges.md

@@ -6,6 +6,7 @@ Changes that make some state saved through SaveBinaryState from a prior version
 
 ## Changes between v5.0.0 and latest
 
+* 20240517 - *SBS* - Combined a number of allocations into 1 for HeightFieldShape. This changes the binary serialization format for this class. (bd32df12bb8ab77b37eeedc226f368268c32ae17)
 * 20240514 - Added macro JPH_OBJECT_STREAM that controls if ObjectStream is compiled or not. By default this is turned on, so you should not see a change, but if you compile without cmake you may need to define JPH_OBJECT_STREAM. (dc3ea787223d45855987e32b8bef7f9a59f6fcd2)
 * 20240504 - Replaced std::vector with a custom Array class. It can be turned off by enabling the JPH_USE_STD_VECTOR define (or the USE_STD_VECTOR cmake option). (bdc1695a643457db86b72119b1393ae69b9a182e)
 * 20240504 - Added a Reallocate function that needs to be implemented when you override the memory allocators and a reallocate function that you need to implement if you have a custom array allocator. The behavior is the same as the C realloc function. It is used to reallocate a block of memory for simple types instead of always going through a alloc, copy, free cycle. (bdc1695a643457db86b72119b1393ae69b9a182e)

Docs/ReleaseNotes.md

@@ -16,7 +16,7 @@ For breaking API changes see [this document](https://github.com/jrouwe/JoltPhysi
 
 #### HeightField Shape
 
-* Sped up deserialization of HeightFieldShape/MeshShape classes by optimizing reading a vector of data in StreamIn and by switching std::vector out for a custom Array class.
+* Sped up deserialization of HeightFieldShape/MeshShape classes by optimizing reading a vector of data in StreamIn, by switching std::vector out for a custom Array class and by combining a number of allocations into one.
 * Added HeightFieldShape::GetMinHeightValue/GetMaxHeightValue that can be used to know which range of heights are accepted by SetHeights.
 * Allowing negative stride when getting/setting height field shape heights or materials. This improves performance if your data happens to be layed out the wrong way around.
 
@@ -26,6 +26,8 @@ For breaking API changes see [this document](https://github.com/jrouwe/JoltPhysi
 
 #### Various
 
+* Replaced std::vector with a custom Array class. std::vector initializes memory to zero which causes an undesired performance overhead.
+* Added macro JPH_OBJECT_STREAM that controls if ObjectStream and serialized attributes are compiled into the library or not. This can reduce the size of the library if you're not using this feature.
 * Added option to get a callback when a JobSystemThreadPool thread starts/stops. This allows you to e.g. set application specific thread locals.
 * Added cmake option USE_ASSERTS to turn on asserts in builds other than the Debug build.
 * Switch from using _DEBUG to NDEBUG to detect debug mode. NDEBUG is defined in the standard while _DEBUG is Visual Studio specific.