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Malte Ubl
6ee5463186
A source module binding whose one write in the program is an unconditional statement of the guarded synchronous initializer holds that value for every later read, like a const; early reads already carry the frontend's init flag, TDZ sentinel or undefined-admitting type. Marking it immutable hands it to constant folding, borrowed reads and constant tables, so top-level `let N = 1024` no longer keeps index math in doubles behind global loads.