title: Writing in memory buffer to S3 object directly via GO SDK for AWS
body: <p>I have a buffer that say when reaches 'X' number of records, it writes a file to disk. I can do a <code>PutObject</code> and send this to S3 and the object will exist this way. Is there a better more optimized way where I flush the in-memory buffer without writing to local disk directly to an S3 object?</p>