[jira] Resolved: (LUCENE-1653) Change DateTools to not create a Calendar in every call to dateToString or timeToString

> Change DateTools to not create a Calendar in every call to dateToString or timeToString
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>                 Key: LUCENE-1653
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1653
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Other
>            Reporter: Shai Erera
>            Assignee: Mark Miller
>            Priority: Minor
>             Fix For: 2.9
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>         Attachments: LUCENE-1653.patch, LUCENE-1653.patch
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> 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.