Alex Hoppen d0cb7ad624 [libSyntax] Eliminate loop in RawSyntax constructor ...

Currently, when creating a `RawSyntax` layout node, the `RawSyntax` constructor needs to iterate over all child nodes to
a) sum up their sub node count
b) add their arena as a child arena of the new node's arena

But we are already iterating over all child nodes in every place that calls these constructors. So instead of looping twice, we can perform the above operations in the loop that already exists and pass the parameters to the `RawSyntax` constructor, which spees up `RawSyntax` node creation.

To ensure the integrity of the `RawSyntax` tree, the passed in values are still validated in release builds.

2021-03-26 18:30:46 +01:00

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