r.\\n\\nA new module, [Array.Builder](https://packages.gren-lang.org/package/gren-lang/core/version/5.1.0/module/Array.Builder), has been added to further improve performance of building large `Array`s. It uses mutation under the hood, but it isn't observable outside of a debugger.\\n\\nIn summary, you should see noticeable improvements in performance with the latest compiler and core packages.\\n\\n## Improved debugging\\n\\nThe changes to the compiler also improves debugging by cleaning up the call stack.