Am 11.07.19 um 23:34 schrieb Sean DiZazzo:
Klein and Crossbar.io seem relevant as well
https://crossbario.com/blog/Going-Asynchronous-from-Flask-to-Twisted-Klein/
yeah, klein is neat! fwiw, this might also be of interest, as it allows to scale-up twisted web (and hence also klein) on multi-core (on linux) https://github.com/crossbario/crossbar-examples/tree/master/benchmark/web combining SO_REUSEPORT with Klein results in a concurrent, async (threadless) server parallelized via processes ..
On Thu, Jul 11, 2019 at 1:46 AM Scott, Barry <barry.scott@forcepoint.com <mailto:barry.scott@forcepoint.com>> wrote:
On Tuesday, 9 July 2019 22:04:11 BST Tom Most wrote:
...snip...
> The reactor's own thread pool is really for DNS > resolution.
Is that still true in the default case? We are use the twisted code that talks to DNS servers as the threaded resolver adds too much latency.
> You risk deadlocks in a system that > ThreadPoolThreadPoolThreadPool > > 3. The specifics of what long_computation are also important. If it doesn't > release the GIL you won't get real parallelism (this is a Python thing, not > a Twisted thing). See this recent thread on the topic > <https://twistedmatrix.com/pipermail/twisted-python/2019-June/032371.html>.
We pass out the computational work to other processes over unix-domain-sockets to avoid the GIL issues.
> > Though the mechanisms differ athis thread on the topicny of the above would > cause the response time to increase as you add load. > > Good luck, > Tom
Barry
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