message: Avoid creating a new std::stringstream and copying data into it every time S3RandomAccessFile::Read() is called. Fixes
diff: @@ -187,9 +187,7 @@ class S3RandomAccessFile : public RandomAccessFile {
  return Status(error::OUT_OF_RANGE, "Read less bytes than requested");
  }
  n = getObjectOutcome.GetResult().GetContentLength();
  - std::stringstream ss;
  - ss << getObjectOutcome.GetResult().GetBody().rdbuf();
  - ss.read(scratch, n);
  + getObjectOutcome.GetResult().GetBody().read(scratch, n);
  *result = StringPiece(scratch, n);
  return Status::OK();
  