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Subject: Re: [Boost-users] boost asio synchronous vs asynchronous operations performance
From: Gavin Lambert (gavinl_at_[hidden])
Date: 2014-03-28 01:17:08

On 28/03/2014 00:09, quoth Bjorn Reese:
> Looking at the new numbers for the optimized build, the main difference
> between the synchronous and asynchronous case is due to the internals
> of the asio::io_service queue (primarily locking.)

FWIW, that matches my own testing results.

I had a case (with serial ports) where this locking latency was
sufficiently high to be bothersome. I wrote an experimental lock-free
reactor engine which appears to outperform Asio (at least on Windows) --
but it's also much more limited and doesn't provide some of the same

For normal (particularly socket) usage it's probably not worth the hassle.

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