Joshua Wong 97005678c3 reduce Box::default stack copies in debug mode ...

The `Box::new(T::default())` implementation of `Box::default` only
had two stack copies in debug mode, compared to the current version,
which has four. By avoiding creating any `MaybeUninit<T>`'s and just writing
`T` directly to the `Box` pointer, the stack usage in debug mode remains
the same as the old version.

2025-01-26 03:48:27 -05:00

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