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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12615) Document GC conserving guidelines for contributors
Date Tue, 02 Dec 2014 20:25:12 GMT
Andrew Purtell created HBASE-12615:

             Summary: Document GC conserving guidelines for contributors
                 Key: HBASE-12615
                 URL: https://issues.apache.org/jira/browse/HBASE-12615
             Project: HBase
          Issue Type: Bug
          Components: documentation
            Reporter: Andrew Purtell

LinkedIn put up a blog post with a nice concise list of GC conserving techniques we should
document for contributors. Additionally, when we're at a point our build supports custom error-prone
plugins, we can develop warnings for some of them. 

Source: http://engineering.linkedin.com/performance/linkedin-feed-faster-less-jvm-garbage

- Be careful with Iterators
- Estimate the size of a collection when initializing
- Defer expression evaluation
- Compile the regex patterns in advance
- Cache it if you can
- String Interns are useful but dangerous

All good advice and practice that I know we aim for. 

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