On 20 Dec 2007 at 13:01, David kerber wrote: > Thanks for all the suggestions! Thanks to you guys and gals, a > report > that had been taking 4 to 5 minutes to process is now taking less > than > 10 seconds to generate! >
Hi, What was the basic overall solution you ended up with? -Steve O. > D > > > David kerber wrote: > > I'm running this app in a tomcat 5.5.x container,I am trying to > figure > > out which form of a list is the best for what I need to do here: > > > > I need to have some kind of list or collection that I can search > > quickly for a specific entry, and then start stepping through the > list > > item by item from that point. The items in the list are all of > the > > same user-defined class (not primitives or pre-defined java > classes). > > My current implementation just uses an iterator starting at the > > beginning, and just walking through until I find the item I want, > and > > continuing to walk from there, but I'm running into performance > issues > > with this. > > > > The individual lists aren't particularly big: single-digits to at > > most a couple hundred items, but I do this processing in a big > outer > > loop which will need to scale up to a few thousand iterations of > > different instances of these lists. What these actually are is > > individual stores' inventory data, with each list being a list of > > their inventory data for a month or so, and I will eventually need > to > > iterate over a couple thousand stores for reporting. > > > > If it seems like I'll never get reasonable speed this way, I could > > switch to calling all the stores' data from the database at once, > > making the lists huge, but only needing to load them once. > However, > > this makes speed in searching the lists much more of an issue, and > I > > don't know which way is going to give me the best overall > performance > > for this report generation. > > > > Any suggestions are welcome, including suggestions for reworking > the > > basic design... > > > > D > > > > -------------------------------------------------------------------- > - > To start a new topic, e-mail: users@tomcat.apache.org > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
