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https://issues.apache.org/jira/browse/HBASE-5628?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13238721#comment-13238721
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Jonathan Hsieh commented on HBASE-5628:
---------------------------------------

Minor optimization: 

in HBaseFsck#loadHdfsRegionInfos we could consolidate.

{code}
if (modTInfo = null) {
 ...
}
..
tablesInfo.put(tableNAme, modTInfo);
{code}

to be 


{code}
if (modTInfo = null) {
  ...
  tablesInfo.put(tableNAme, modTInfo);
}
..
{code}
                
> Improve performance of uberhbck
> -------------------------------
>
>                 Key: HBASE-5628
>                 URL: https://issues.apache.org/jira/browse/HBASE-5628
>             Project: HBase
>          Issue Type: Improvement
>          Components: hbck
>    Affects Versions: 0.90.7, 0.92.2, 0.94.0, 0.96.0
>            Reporter: Jonathan Hsieh
>
> During reviews of HBASE-5128 there are several opportunities investigate for 
> improving the performance of the tool.
> - Change regionInfoMap and tablesInfo from TreeMap to HashMap.
> - Change some full region set reloads to be incremental to require fewer 
> passes.
> - Cache meta for subsequent calls of closeRegionSileneglyAndWait

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