Andreas Kling fb3d1c2754 LibJS: Reuse the internal iterator object across a for..in iteration ...

Instead of creating a new iterator result Object for every step of
for..in iteration, we can create a single object up front and reuse it
for every step. This avoids generating a bunch of garbage that isn't
observable by author code anyway.

We can also reuse the existing premade shape for these objects.

2025-03-20 12:51:21 -05:00

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