hi all,
Iam trying to investigate some serious memory problems and ways to
optimize them in our web application.

some of the information i collected using the performance monitor, is
that number of assemblies loaded per appdomain is large,
we have a lot of pages which are using number of user controls,
some of the documentation i read in this respect was that when asp.net
will compile the page ( first time it is accessed) it will create an
assembly for each page , and if that page references user controls,
assemblies would be created for each user control too

I dont know how much iam correct on this

this would load a large amount of assemblies and assemblies would not be
unloaded untill the appdomain gets unlaoded from asp.net wp

some articles on monitoring and performance also say that avoid using
<%@reference .. > , <@%import ... > or <@%register > directives as these
would create parse time dependencies, and use LoadControl instead, in
all the examples online to use usercontrols, even though we can use
loadcontrol, we still need to <@%register > directive to strong type
casting

can anyone throw more light on this, and may be tell me if my
investigation is going in right direction or not,

any help/pointers would be appreciated

Regards
-ashish

Hi Ashish,

This is not exactly correct. Whenever possible, ASP.NET will batch compile
multiple pages and user controls together, hence creating a smaller number
of assemblies that need to be loaded. Note that this does not happen if
the page/uc has a debug=true attribute. Maybe that is whay you are seeing
this?

As for the suggestion about avoiding <%@reference .. > , <@%import ... > or
<@%register >, it is not quite correct, except for one case: if you have
<%@ import src="somefile.cs" %> that file is always compiled by itself.
But for loading user control, it makes no difference whether you use
@register or LoadControl when it comes to the number of assemblies that get
loaded.

Hope this helps,
David;

[quoted text, click to view]
Thanks David,
after so many days i thought no one would reply,
i was also wondering that if some controls were conditional on the page
i.e if there was a control which is embedded inside another control, and
the container control is being haevily used, but embedded conntrol is
used only in 10 % of the sitiuations, would conditional loading help
reducing amount of objects being created ?

TIA
-ashish

Yes, absolutely. If you conditionally load some controls, then you will
indeed reduce the number of objects in the tree for requests where those
conditional controls are not needed.

David;

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