Thanks for the tips. I a couple questions about your comments. - question regarding number 3,5... is there a deconstructor in ActionScript that I can place cleanup code?
- number 6 what do you mean by activation object? Do you mean RemoteObject? if so, could you please explain how to clean it up properly, as I need to use it, and there was no documentation on how to clean it up. Thanks! --- In [email protected], "JesterXL" <[EMAIL PROTECTED]> wrote: > > 6 rules of thumb: > > 1. never trust an alpha for benchmarking > > 2. never trust a beta for benchmarking > > 3. if it's a member variable, delete it: > > delete myVar; > > 4. if it's a local variable, null it at the end of the function: > > function cow() > { > var a:String = ""; > a += "one"; > a += "two"; > a = null; > } > > 5. remove your event listeners before destroying the objects you registered > with > > 6. do not use the activation object unless you know how to clear it later > (most people I've seen in AS2 never do, so try not to use it period). > Example is xml.onLoad where the xml is created as a local variable in a > function. It'll live on even though it's a local variable. > > ----- Original Message ----- > From: "thunderstumpgesatwork" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Saturday, February 18, 2006 7:02 PM > Subject: [flexcoders] Object cleanup and memory usage "Best Practices" > (2.0b1) > > > Hi all, > > I've been coding in Flex now for a few months (basically since the 2.0 > Alpha came out) and I've been having a heck of a problem with memory > leaks. > > I was curious if there's any kind of rules or best practices to use > for cleaning up AS objects (destructors? finalize()? or other?) This > is especially pertinent because I am using lists/hash's, charts, and > RPC Services. > > I couldn't really find any documentation regarding clean-up and memory > leaks. Does anyone out there have any experiences/knowledge to share? > > Below, I'll outline my architecture, and note that I have no > cleanup/de-construction code right now at all, other than setting > variable references to new objects or null. Sorry it's pretty long, so > if you want to stop reading here and provide any ideas you have, feel > free =) > > thanks, > Thunder > _____________ > > > Basically I am running dynamic DB queries through a singleton > RemoteObject called by a "ChartResults" class that holds the results > (e4x XML) of the query and metadata info related to it. I have > employed the "Asynchronous Completion Token" documented approach to > allow the ChartResults classes to pick out only their calls from the > singleton R.O. > Is this detrimental to performance if there are anywhere from 4-10 SQL > calls possibly going through the one RemoteObject? (note - that's an > upper limit during initial startup only) > > The ChartResults class caches information as it is retrieved from the > results (often after performing filtering/sorting, etc). > > When a new query result comes in, the I clear all the cache > items by setting the hash objects or Array to null or new Object/Array > respectively. > > 1 - Does setting a property referencing a Collection to null also > release the source Array held in it? > > 2 - Do I also need to set each item in the Array to null? > > 3 - If a hash Object had many different XMLList properties cached, > do I need to iterate and null all these properties using introspection? > > Also, on the Chart side, I have been deleting the series array and > creating a new one when re-populating the chart (if it is showing > entirely new/different data). > > 4 - Do I need to do any cleanup of the series items maybe? > > 5 - Are the Series getting cleaned up and releasing their dataProvider > objects? > > Somewhere I am leaking memory badly as the number of chart queries > goes up and up... > > Thanks again! > Thunder > > > > > > > -- > Flexcoders Mailing List > FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt > Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com > Yahoo! Groups Links > -- Flexcoders Mailing List FAQ: http://groups.yahoo.com/group/flexcoders/files/flexcodersFAQ.txt Search Archives: http://www.mail-archive.com/flexcoders%40yahoogroups.com Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/flexcoders/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
