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
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