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Teach the asm PutByValue path to materialize in-bounds holey array elements directly when the receiver is a normal extensible Array with the default prototype chain and no indexed interference. This avoids bouncing through generic property setting while preserving the lazy holey length model. Keep the fast path narrow so inherited setters, inherited non-writable properties, and non-extensible arrays still fall back to the generic semantics. Add regression coverage for those cases alongside the large holey array stress tests.