[boost] [asio] inefficiency in the polling

Subject: [boost] [asio] inefficiency in the polling
From: Tatsuyuki Ishi (ishitatsuyuki_at_[hidden])
Date: 2016-09-27 11:10:16

The current run/poll_one does polling regardless if there's task in the
queue.

If there's task in the queue, polling is just a waste of system call, since
there's already a job to do.

Also, my common use case is "wait and consume all work", which is not
covered efficiently by current design. (run_one+poll takes two system calls)

Side note: on Windows asio performs even worse, it only retrieve one event
per syscall... Not sure if it's intended.

Friendly note: please use "Reply to All" when replying to me.