If you want or need to block in a go-block then you should use the
`thread` macro instead of the `go` macro. A thread macro block will be
ran in a cached thread pool as you seem to be wanting:
https://github.com/clojure/core.async/blob/master/src/main/clojure/clojure/core/async.clj#L379
Just note that you will need to use the blocking CSP operator variants,
e.g. <!! instead of <!, while inside of `thread`.
-Ben
On 3/27/14, 9:24 AM, icamts wrote:
Thank you Ben.
Can we speculate on a go-off macro? Like in agents send / send-off to
have go-off blocks executed by a cached thread pool executor?
Luca
Il giorno giovedì 27 marzo 2014 16:01:16 UTC+1, Ben Mabey ha scritto:
I asked Timothy Baldridge about this on IRC when the change was
made that added 42 and this was the reply I got:
we're trying to strike a balance there, we don't want people to
do IO inside a go block, but if they have to we'd don't want it to
totally stall out.
Here is the full conversation:
http://clojure-log.n01se.net/date/2013-08-29.html#15:45a
<http://clojure-log.n01se.net/date/2013-08-29.html#15:45a>
-Ben
On 3/27/14, 8:55 AM, icamts wrote:
Hi all,
quite a funny question. Thread pool size in core.async is twice
the number of processors plus 42.
https://github.com/clojure/core.async/blob/master/src/main/clojure/clojure/core/async/impl/exec/threadpool.clj
<https://github.com/clojure/core.async/blob/master/src/main/clojure/clojure/core/async/impl/exec/threadpool.clj>
42? The question is:
1) should it be 4 or 2?
2) 42 is the response to life, universe and everything
3) for some technical reason 42 is also a good minimum number for
a thread pool
Luca
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