Yes they're C++ objects. The problem with trying to read the memory is that libxml has several different structs it uses for different node types. And I can't tell through the pointer what type it is. Plus I don't know enough about libxml yet. I don't know what struct properties to also include in the allocation count. I don't want to count child nodes and such. I'm sure it can be done with a lot of research and a lot of checking, but an easier solution would be preferable.
Yes, I would rather let v8 handle things. The reason this is an issue in my instance, is that my users want to be able to allocate huge node trees over and over again in tight loops. So the memory stacks up fast and v8 doesn't know about it so you chew through your memory before the GC has a chance to run. I know it can be solved with a good hint system for the GC. In tests, we were able alleviate the problem by invoking the GC manually at certain intervals. So the destructors are good, they're just not being called often enough. I'm probably going to end up with a combination of this cheap hint solution plus Anton's awesome memory checker from Chromium. Thanks all :Marco On Fri, May 7, 2010 at 9:58 AM, Stephan Beal <[email protected]> wrote: > On Fri, May 7, 2010 at 3:54 PM, Stephan Beal <[email protected]>wrote: > >> elements themselves are destroyed. If your elements are C++ bound classes >> then that probably isn't much work, whereas if they are plain JS objects it >> would be problematic to capture the destruction for purposes of decrementing >> the memory use. >> > > OTOH, if the elements are "pure JS" then v8 already knows how much memory > is used by them. You would only need to track the memory for any native > libxml components which you keep around for the life of the parser. > > But if it becomes too much of a pain, just keep in mind that this level of > management isn't technically necessary - it's just a way to allow v8 to help > enforce any hard memory limit by making it aware of external allocation > sizes. > > -- > ----- stephan beal > http://wanderinghorse.net/home/stephan/ > > -- > v8-users mailing list > [email protected] > http://groups.google.com/group/v8-users > -- Marco Rogers [email protected] Life is ten percent what happens to you and ninety percent how you respond to it. - Lou Holtz -- v8-users mailing list [email protected] http://groups.google.com/group/v8-users
