[jira] [Created] (LUCENE-7014) Use TimeUnit.TARGETUNIT.convert() to convert between time units

["Ahmet Arslan (JIRA)" <ji...@apache.org>]

Ahmet Arslan created LUCENE-7014:
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             Summary: Use TimeUnit.TARGETUNIT.convert() to convert between time units
                 Key: LUCENE-7014
                 URL: https://issues.apache.org/jira/browse/LUCENE-7014
             Project: Lucene - Core
          Issue Type: Improvement
    Affects Versions: 5.4.1, master
            Reporter: Ahmet Arslan
            Priority: Minor
             Fix For: 5.5, master, 6.0


Re-phrased from [~steve_rowe]'s [comment|https://issues.apache.org/jira/browse/LUCENE-6823?focusedCommentId=14941283&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14941283] :

System.nanoTime(), which is guaranteed to be monotonic, is now used to recored elapsed times. In several places, conversion from nano seconds to some target unit (e.g. seconds, milli seconds) is performed using hard-coded conversion constants, which is prone to mistakes. 

It would be nice to use {{TimeUnit.TARGETUNIT.convert(sourceDuration, TimeUnit.SOURCEUNIT)}} instead.



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