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Subject: Re: Ivy slow resolution
From: =?iso-8859-1?Q?Nicolas_Lalev=E9e?= <nicolas.lalevee@hibnet.org>
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Date: Mon, 28 Apr 2014 16:13:46 +0200
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To: "Ant Developers List" <dev@ant.apache.org>


Le 28 avr. 2014 =E0 13:59, Josh Suereth <joshua.suereth@gmail.com> a =
=E9crit :

> On a whim, I implemented parallel download of artifacts by hooking the
> downloadArtifacts
> method of Resolve engine.  While this can potentially speed up =
download
> performance, the resolution times (getDepedencies) still dominates (of
> course).  Parallel downloads is an often requested feature of sbt, so =
we
> may still release this hook for our users, as they request it, but I =
think
> the *really* just want faster resolution times.
>=20
> We may be doing some investigation into improving the performance of
> getDependencies (and most importantly fetchDependencies).  I was =
curious if
> anyone else in the Ivy community has attempted this before and what =
sorts
> of guidance they could offer before we dig in.

This has been discussed, but AFAIR nothing has been done other than =
discussing the potential issues to tackle.

Things which would require some attention would be to find a way to =
properly report the progress of the parallel download: in the console =
when it's done via Ant or via the listeners for IvyDE.
A thing that is worrying me, is that Ivy is quite sensitive to which =
thread is actually working on the resolve, see IvyContext's thread =
local. So a parallelization may not be a very upper level than the =
artifact downloading.

Nicolas


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