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https://issues.apache.org/jira/browse/ORC-175?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16119622#comment-16119622
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Gopal V commented on ORC-175:
-----------------------------

igzip is not testing the same codepath as ORC, because ORC does use a mix of 
LZ77 widths and tries to use faster decode loops, at lower compression levels 
(it uses different zlib combinations for different column types).

https://github.com/apache/orc/blob/master/java/core/src/java/org/apache/orc/impl/ZlibCodec.java#L138

Does ISA-L offer any meaningful speedups for those combinations of 
Zlib-compatible algorithms?

> ZLIB performance
> ----------------
>
>                 Key: ORC-175
>                 URL: https://issues.apache.org/jira/browse/ORC-175
>             Project: ORC
>          Issue Type: Improvement
>          Components: Java
>            Reporter: iamhumanbeing
>            Assignee: iamhumanbeing
>              Labels: performance
>   Original Estimate: 336h
>  Remaining Estimate: 336h
>




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