docs: Rationalize wsjson buffer pooling and explain tradeoffs
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- Go
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Description
I see that this library is using `sync.Pool` to pool buffers for wsjon sub-package. `sync.Pool` is suitable only for pooling objects of same size. If they are of different size, you have a problem: those buffers will just grow and grow never to shrink.
See https://github.com/golang/go/issues/23199 for more background.
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