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Re: Issue with c++11 header random.h

From: David Edelsohn <dje dot gcc at gmail dot com>
To: "Nolen, Steven D" <drnuke at lanl dot gov>
Cc: "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Mon, 3 Dec 2012 11:25:33 -0500
Subject: Re: Issue with c++11 header random.h
References: <5D6BECD55E4F8C4EAAC696AF20664946339DE349@ECS-EXG-P-MB03.win.lanl.gov>

On Mon, Dec 3, 2012 at 10:54 AM, Nolen, Steven D <drnuke@lanl.gov> wrote:
> In the c++11 headers for the random number generation (random.h), the function "discard" for the linear_congruential has been implemented in a very inefficient manner.  Many modern Monte Carlo codes require this function to work efficiently across large strides through the random number stream.  A direct approach is available through the Boost headers and has been documented in the literature.  I would request that this function be reimplemented before more users discover it on accident as they transition from the boost headers to the c++11 ones you provide.

This probably should be opened as a libstdc++ enhancement request in
GCC Bugzilla.

Can LANL write and contribute a better implementation or contract
someone to do so?

Thanks, David

References:
- Issue with c++11 header random.h
  - From: Nolen, Steven D

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