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
-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
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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