Tasks

Control asyncio Task Startup with eager_start

Creating an asyncio task usually feels like a clean scheduling boundary: call asyncio.create_task(), keep the returned task, and let the event loop run the coroutine soon. Python also supports eager task execution, where a coroutine can begin running immediately during task creation. Python 3.14 makes that choice directly available through the eager_start keyword on asyncio.create_task() and through task-group task creation. That can remove scheduling overhead for coroutines that often complete without blocking. It can also change program ordering in ways that matter much more than the performance gain.