Andreas Kling 88d715fc68 LibJS: Eliminate HashMap operations in SFID by caching parser data ...

Cache necessary data during parsing to eliminate HashMap operations
in SharedFunctionInstanceData construction.

Before: 2 HashMap copies + N HashMap insertions with hash computations
After: Direct vector iteration with no hashing

Build FunctionScopeData for function scopes in the parser containing:
- functions_to_initialize: deduplicated var-scoped function decls
- vars_to_initialize: var decls with is_parameter/is_function_name
- var_names: HashTable for AnnexB extension checks
- Pre-computed counts for environment size calculation
- Flags for "arguments" handling

Add ScopeNode::ensure_function_scope_data() to compute the data
on-demand for edge cases that don't go through normal parser flow
(synthetic class constructors, static initializers, module wrappers).

Use this cached data directly in SFID with zero HashMap operations.

2026-01-25 23:08:36 +01:00

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