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Re: [Guile-commits] GNU Guile branch, stable-2.0, updated. v2.0.1-92-gf4

From: Ludovic Courtès
Subject: Re: [Guile-commits] GNU Guile branch, stable-2.0, updated. v2.0.1-92-gf4e45e9
Date: Wed, 08 Jun 2011 23:05:03 +0200
User-agent: Gnus/5.110017 (No Gnus v0.17) Emacs/24.0.50 (gnu/linux)

Hello Andy!

"Andy Wingo" <address@hidden> skribis:

> commit f4e45e91f265429ad1c42d3905dd3c05a0bc0924
> Author: Andy Wingo <address@hidden>
> Date:   Thu May 26 18:14:32 2011 +0200
>     lazily init futures worker pool
>     * module/ice-9/futures.scm (%workers, %create-workers!)
>       (create-workers!): Define a mechanism to spawn off the future threads
>       only when the first future is created.
>       (make-future): Call create-workers! here.


>    "Return a new future for THUNK.  Execution may start at any point
>  concurrently, or it can start at the time when the returned future is
>  touched."
> +  (create-workers!)

Wouldn't it be more efficient to instead do:

  (if (null? %workers)

Once the workers are created, that would leave 0 function calls.


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