Issue 33530: Implement Happy Eyeball in asyncio (original) (raw)

Add a Happy Eyeballs implementation to asyncio, based on work in https://github.com/twisteroidambassador/async_stagger .

Current plans:

• Add 2 keyword arguments to loop.create_connection and asyncio.open_connection.

  • delay: Optional[float] = None. None disables happy eyeballs. A number >= 0 means the delay between starting new connections.

  • interleave: int = 1. Controls reordering of resolved IP addresses by address family.

• Optionally, expose the happy eyeballs scheduling helper function.

  • It's currently called "staggered_race()". Suggestions for a better name welcome.

  • Should it belong to base_events.py, some other existing file or a new file?