From: Tony Arcieri <tony.arcieri@...>
Date: 2012-07-06T01:34:13+09:00
Subject: Re: Green threads in 1.9.* ?

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On Thu, Jul 5, 2012 at 6:38 AM, rex goxman <lists@ruby-forum.com> wrote:

> This is a crappy example, but say you need to do some
> calculation which might fail or even crash, but you don't want (or need)
> to check the inputs to the calculation, or wrap the thing up in an error
> catching mechanism, or anything of this nature.  You just want to
> calculate it, and if it works, fine, and if it doesn't (or even crashes)
> - fine, your main program continues to run.  So spawn a green thread to
> run the calculation.  If it works, great.  If it crashes, who cares?
>

You want threads as a way to silently swallow exceptions? o_O I'm going to
go out on a limb and say that's a terrible application for threads...

You might say "do that with a kernel thread."  But what if I want to
> spawn this thread over and over again in a tight loop?  I don't want or
> need the monstrous overhead of a kernel thread here.  I just want a
> green thread.
>

If the time it takes to spawn a thread is really too much, use a thread
pool.

-- 
Tony Arcieri

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<div class=3D"gmail_quote">On Thu, Jul 5, 2012 at 6:38 AM, rex goxman <span=
 dir=3D"ltr">&lt;<a href=3D"mailto:lists@ruby-forum.com" target=3D"_blank">=
lists@ruby-forum.com</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_qu=
ote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex=
">

<div class=3D"im">This is a crappy example, but say you need to do some</di=
v>
calculation which might fail or even crash, but you don&#39;t want (or need=
)<br>
to check the inputs to the calculation, or wrap the thing up in an error<br=
>
catching mechanism, or anything of this nature. =A0You just want to<br>
calculate it, and if it works, fine, and if it doesn&#39;t (or even crashes=
)<br>
- fine, your main program continues to run. =A0So spawn a green thread to<b=
r>
run the calculation. =A0If it works, great. =A0If it crashes, who cares?<br=
></blockquote><div><br></div><div>You want threads as a way to silently swa=
llow exceptions? o_O I&#39;m going to go out on a limb and say that&#39;s a=
 terrible application for threads...</div>

<div><br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex=
;border-left:1px #ccc solid;padding-left:1ex">
You might say &quot;do that with a kernel thread.&quot; =A0But what if I wa=
nt to<br>
spawn this thread over and over again in a tight loop? =A0I don&#39;t want =
or<br>
need the monstrous overhead of a kernel thread here. =A0I just want a<br>
green thread.<br></blockquote><div><br></div><div>If the time it takes to s=
pawn a thread is really too much, use a thread pool.</div><div><br></div></=
div>-- <br>Tony Arcieri<br><br>

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