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<p>Xavier,</p>
<p> The impetus for the move from 32 to 64 bit really came down to
the Trnsys link with Matlab. Matlab stopped distributing a 32-bit
version so if we wanted the link to continue (and there was no
question that we did) we had to make a 64-bit version of Trnsys. I
don't think that you'll see any great change in precision or
performance by migrating your components to 64-bit. We don't have
any specific plan to discontinue the 32-bit version of Trnsys18
but the "standard" version is the 64-bit version and the 32-bit
version will eventually become obsolete and will get dropped.</p>
<p> The main issue that we had in migrating Trnsys is that the
64-bit compilers seem to be a lot less tolerant of divisions by
zero. Those will trip up the 64-bit version of Trnsys where they
somehow did not in the 32-bit version. On the whole, though, I am
glad that the 64-bit compiler is picky; I'd rather catch and fix
those errors rather than have a division by zero result somehow
carried along through later calculations.</p>
<p>kind regards,</p>
<p> David</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 02/17/2022 02:09, Jobard Xavier via
TRNSYS-users wrote:<br>
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<p class="MsoNormal"><span lang="EN-US">Hi to the community, <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">We are currently
assessing if it makes sense to port some custom models that
we have compiled in 32bit to the 64bit version. We saw that
it could be tricky with the new compilers that is less
forgiven as older versions. Therefore we would like to know
if someone has actually benchmarked the gain that one would
have to merge to the 64bit version of TRNSYS18 ?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Looking forward,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<pre class="moz-quote-pre" wrap="">_______________________________________________
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<a class="moz-txt-link-freetext" href="http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org">http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org</a>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI 53703 USA
P:+1.608.274.2577
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.tess-inc.com">http://www.tess-inc.com</a>
<a class="moz-txt-link-freetext" href="http://www.trnsys.com">http://www.trnsys.com</a></pre>
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