Remi Dettai created ARROW-8875: ---------------------------------- Summary: [C++] use AWS SDK SetResponseStreamFactory to avoid a copy of bytes Key: ARROW-8875 URL: https://issues.apache.org/jira/browse/ARROW-8875 Project: Apache Arrow Issue Type: Improvement Components: C++ Reporter: Remi Dettai
Currently, in `GetObjectRange` of f3fs the `GetObjectRequest` has no `ResponseStreamFactory` assigned. This means that the bytes returned by the S3 API are first sent to a `std::basic_stringbuf`. To my understanding this has two performance impacts: * `std::basic_stringbuf` uses a growing array to buffer the response, so lots of allocations here * on top of that, you have a copy operation from the `std::basic_stringbuf` when data is read into the Arrow buffer. This seems to be a bit costly. With `ResponseStreamFactory`, we might manage to get the data directly into the Arrow buffer. I can take a try at it, but I would need some advice. Is there an existing utility to stream data into an Arrow buffer (if it exists, it is well hidden!) ? or should I stream the data into a plain array and then transfer ownership to Arrow ? -- This message was sent by Atlassian Jira (v8.3.4#803005)