Improving memory use [Was: [jira] Created: (CAY-999) Scaling paginated list]

From: Andrus Adamchik (andru..bjectstyle.org)
Date: Wed Mar 05 2008 - 08:44:02 EST

  • Next message: Kevin Menard (JIRA): "[jira] Assigned: (CAY-1000) Duplicate items in list."

    On Mar 5, 2008, at 2:43 PM, Andrus Adamchik (JIRA) wrote:

    > a. DataRow - 120 bytes,
    > b. HashMap - 104 bytes,
    > c. Object[] - 32 bytes,
    > d java.lang.Integer - 16 bytes

    This got me thinking about DataRow memory/creation efficiency
    throughout the framework. We are wasting lots of space on repeating
    information. Essentially a DataRow for each entity has a well defined
    set of keys, so ideally we can normalize the storage of DataRows
    internally, saving an Object[] of values with a reference to a shared
    "decode map", one per entity. Such a shared map would have DbAttribute
    names for the keys and array positions for the values. What we'll lose
    is the ability to serialize DataRows (e.g. for remote notifications),
    but maybe we can work around it somehow.

    Just thinking out loud ...

    Andrus

    This archive was generated by hypermail 2.0.0 : Wed Mar 05 2008 - 08:44:34 EST