The BlobstoreService has two method using which one can fetch data.

The first one being fetchData(blobKey, start, end) => which fetches
the subset for a blob.
The second being serve(blobKey)

Is there a reason why the "serve" method, does not maintain the same
contract as that of fetchData(...) ? What if i wanted to serve a part
of the blob ? Should i be using the fetchData(...) instead?

My second question is, that if i was fetching partial blobs, what
would be more optimal ?
a. large number of smaller fetchData requests or one large fetchData
request ?

Thanks,
Rahul

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