// Starting with an 8k buffer, double the size of each successive buffer. Smaller buffers
    // quadruple in size until they reach 8k, to minimize the number of small reads for longer
    // streams. Buffers are retained in a deque so that there's no copying between buffers while
    // reading and so all of the bytes in each new allocated buffer are available for reading from
    // the stream.
    for (int bufSize = initialBufferSize;

* ✨ Add support for `deque` objects and children in `jsonable_encoder`. PR [#9433](https://github.com/tiangolo/fastapi/pull/9433) by [@cranium](https://github.com/cranium).

### Docs