Re: [Quantlib-dev] qlxl dependencies and object updates

[Ferdinando A. <na...@am...>]

Hi Peter

> In fact there may be a problem. I attach an example sheet. [...] During this I
> observe that more and more memory is used by excel.exe. Escaping the
> loop, the number of objects is 5 (seems ok). If I delete the yield curve
> object (by computing cell b12) the memory allocated before is released.
>
> I am aware that one should not recompute the yield curve object if quotes
> are updated, but rather rely on the implemented observer pattern. However
> the behaviour above should not be as it is, should it?

yes, I think you've found a genuine memory leak. Eric ?

> However, if I recompute e.g. cell a2 (the first rate helper) and a9
> afterwards, I see the same effect, i.e. the yield curve object seems to
> have received a notification from the recomputed rate helper object?

would you elaborate a little more here. I mean there might be a lot
going on under the surface (and undocumented :-), but before
discovering my cards I would need to understand what exactly do you do
in this second case. Namely before recomputing a2 do you setValue ?
What do you mean by "the yield curve object seems to have received a
notification from the recomputed rate helper object"

later

ciao -- Nando