"gRPC Python, C Extensions, and AsyncIO EuroPython 2020 - Talk - 2020-07-24 - Microsoft Online By Lidi Zheng, Pau Freixes Goal - Encourage Python developers to understand C extensions by sharing gRPC Python’s practice, and advocate the adoption of AsyncIO. Prerequisite - Understand thread vs. process; - Interested in asynchronous programming. gRPC Brief - What’s gRPC Core? And what is gRPC Python? Cython To The Rescue - Why we picked Cython among all other available tools (e.g., pybind11, ctypes) - Debuggability: pdb & gdb The GIL Friction - How to delegate work to C extension - How to make multithreading work AsyncIO Topic - Not blocking the loop, the main headache. - Non-blocking I/O solution 1: replacing C libraries’ I/O operations - Non-blocking I/O solution 2: dedicated background poller thread - Performance improvement (10k - 20k for client, 4k - 16k for server) Migration to AsyncIO - Tolerate multithreading and AsyncIO in the same application - Make both API co-existable in the same application License: This video is licensed under the CC BY-NC-SA 3.0 license: https://creativecommons.org/licenses/by-nc-sa/3.0/ Please see our speaker release agreement for details: https://ep2020.europython.eu/events/speaker-release-agreement/ "