Possible unnecessary data copying from remotefile/blobfile

[cmdcolin]

The interface requires pre-allocation of a buffer and then copies results from something like a fetch which can involve large amounts of data. If there is some way to fix this it would be desirable

CC @jrobinso

[rbuels]

Based on discussion just now, we are proposing adding an allocAndRead method with an API that does not take a passed-in buffer. Draft signature:

Promise<buffer> allocAndRead(offset, length, position)

[cmdcolin]

Likely offset will not be implemented. Offset is rarely used anyways, it is the "offset into the pre-allocated buffer that you write the returned data into"

[rbuels]

Oh right.

so that would be
Promise<buffer> allocAndRead(length, position)

[cmdcolin]

Yap