`OtherInlineBufferCapacity <= InlineBufferCapacity` implies
`size <= InlineBufferCapacity` and can be done at compile time.
So if that is true already (as it commonly is), the `else` branch
is not necessary. This can improve performance in theory, although
I couldn't measure that in practice.
Additionally, this change also reduces the binary size (because of the
omitted else branch). Since this code is inlined fairly often, the impact
is measurable: the binary size is reduced by 50kb.
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