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https://issues.apache.org/jira/browse/FLEX-34012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13856276#comment-13856276
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Maurice Amsellem commented on FLEX-34012:
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Thanks Justin. That could explain why I didn't notice slow-down as I tested
with 4.12
> 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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