Andreas Kling a0864dbb26 LibJS: Make mapped arguments objects way less allocation-happy ...

By following the spec to the letter, our mapped arguments objects ended
up with many extra GC allocations:

- 1 extra Object for the internal [[ParameterMap]].
- 2 extra NativeFunctions for each mapped parameter accessor.
- 1 extra Accessor to hold the aforementioned NativeFunctions.

This patch removes all those allocations and lets ArgumentsObject model
the desired behavior in custom C++ instead of using script primitives.

1.06x speedup on Speedometer's TodoMVC-jQuery.

2025-05-11 14:00:40 +02:00

92 KiB

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