[jira] [Commented] (FLEX-34012) Slow performance when trying to null Array after copy & paste large data

["Maurice Amsellem (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLEX-34012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13856025#comment-13856025 ] 

Maurice Amsellem commented on FLEX-34012:
-----------------------------------------

1) I have looked quickly at the code. It's not exactly what you describe in the steps.
The data has 100 colums but it also has *25000 rows*!

2) When you say "application would be halted for 30 secon", what are you talking about?  which step? 
because delArr() does not have any effect, as it's only nulling the array, not the ArrayCollection, / dataProvider

3) Also, I don't understand the goal of your test.
Are you testing deletion of all rows in a datagrid ?  or deletion of user-selected rows in the worst case (that is, when user selects all rows) ?

4) Did you run your code in the profile, or using Adobe Scout to see what is taking so much time ?

I suggest your clarify a bit the description of the issue, and your goals so that we can help you.

> Slow performance when trying to null Array after copy & paste large data
> ------------------------------------------------------------------------
>
>                 Key: FLEX-34012
>                 URL: https://issues.apache.org/jira/browse/FLEX-34012
>             Project: Apache Flex
>          Issue Type: Bug
>    Affects Versions: Adobe Flex SDK 4.6 (Release)
>            Reporter: Abhishek Dwevedi
>              Labels: easytest
>         Attachments: Main.mxml
>
>
> STEPS TO REPRODUCE:
> ===================
> 1. Run the attached Main.mxml
> 2. Click "Make Data (101 columns)"
> 3. Select all rows then click "Copy" 
> 4. Select all rows then click "Delete"
> 5. Click "Paste" 
> 6. Click "Delete Array"
> RESULT:
> =======
> Application would be halted for approximately 30 seconds.
> EXPECTED:
> =========
> Nulling Array should not take so much time. If you make data for 100 columns in the above steps, the issue won't occur.
> WORKAROUND:
> ===========
> Not found yet.
> [Researched]
> ============
> * Using callLater() for nulling Array didn't help.
> * array = null is not helping
> * array.length = 0 is also not helpful.



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