TIL you can use "http://Object.prototype.toString.call (obj) === '[object Uint8Array]'" as a performant alternative to Buffer.isBuffer() - can, not should
Drawback is that it doesn't work in older node versions, less readable, also allows raw Uint8Arrays - but if you control the env it can be 
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older then which one?
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the latest - you'd need to BYO V8 for it to be faster rn
End of conversation
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