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<div class="moz-cite-prefix"> Erwan<br>
If you have a QP problem, your hessian is constant and Ipopt have
the "hessian_constant" option that will save you some time.<br>
You can check this option here:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.coin-or.org/Ipopt/documentation/node43.html#SECTION000114090000000000000">http://www.coin-or.org/Ipopt/documentation/node43.html#SECTION000114090000000000000</a><br>
<br>
Repeated below:<br>
<br>
<h4>hessian_constant:
</h4>
Indicates whether the problem is a quadratic problem <br>
Activating this option will cause Ipopt to ask for the Hessian of
the Lagrangian function only once from the NLP and reuse this
information later. The default value for this string option is
"no".
<br>
Possible values:
<ul>
<li>no: Assume that Hessian changes
</li>
<li>yes: Assume that Hessian is constant
</li>
</ul>
<br>
I hope this could help.<br>
<br>
</div>
Edson Valle<br>
<br>
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