[scikit-learn] Estimator.predict() thread safety

[Gael Varoquaux]

No, the inner loop won't be run parallel.

G

On Fri, Jun 17, 2016 at 11:46:59AM -0400, Philip Tully wrote:
> Gotcha - so perhaps I should ensure FeatureUnion[n_jobs] + GirdSearch[n_jobs] <
> # cores?

> On Fri, Jun 17, 2016 at 11:21 AM, Gael Varoquaux <gael.varoquaux at normalesup.org
> > wrote:

>     > I am typically careful with this, e.g., if my machine has 16 cores, I’d
>     > set feature union to n_jobs=3 and the gridsearch_cv to n_jobs=4 or so.
>     > Curious to hear what the scikit devs think about nesting calls
>     > n_jobs=-1; am I too conservative?

>     Nested parallelism doesn't work. It's a limitation of multiprocessing.
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    Gael Varoquaux
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