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https://issues.apache.org/jira/browse/LUCENE-1653?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12713552#action_12713552
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Mark Miller commented on LUCENE-1653:
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Looks like a good change to me. Only downside I see is that round was not
synced before, but now it is. Seems the benefits outweigh though - doesn't have
to make the cal each time, and avoids double cal creation that happened when
other methods called round. Anyone else have a comment before I commit?
> Change DateTools to not create a Calendar in every call to dateToString or
> timeToString
> ---------------------------------------------------------------------------------------
>
> Key: LUCENE-1653
> URL: https://issues.apache.org/jira/browse/LUCENE-1653
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Other
> Reporter: Shai Erera
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1653.patch
>
>
> DateTools creates a Calendar instance on every call to dateToString and
> timeToString. Specifically:
> # timeToString calls Calendar.getInstance on every call.
> # dateToString calls timeToString(date.getTime()), which then instantiates a
> new Date(). I think we should change the order of the calls, or not have each
> call the other.
> # round(), which is called from timeToString (after creating a Calendar
> instance) creates another (!) Calendar instance ...
> Seems that if we synchronize the methods and create the Calendar instance
> once (static), it should solve it.
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