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5c19a48b95
Previously, to get the globally available declarations in a document (including declarations from headers), we would have to recursively walk the #include tree and get the declarations of each included document. To improve upon this, we now store a HashTable of globally available declaration from included header files in each document, and populate it when we first process the document. Before this, invoking simple autocomplete actions in code documents that had a very large #include tree (e.g when <LibGUI/Widget.h> was included) hang the CppLanguageServer process and used 100% CPU until the process ran out of memory. Now, the autocomplete request in that situation returns immediately :^)