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https://issues.apache.org/jira/browse/HBASE-4012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13057709#comment-13057709
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Eric Charles commented on HBASE-4012:
-------------------------------------
sun.msc.Unsafe is still in jdk7
(http://hg.openjdk.java.net/jdk7/jdk7/jdk/file/tip/src/share/classes/sun/misc/Unsafe.java)
I tried to build hbase trunk with JDK build 1.7.0-ea-b143, and it's OK.
There's always a risk it will be renamed one day "oracle.msc.Unsafe"...
I also remember my surprise going from JDK1.4 to JDK1.5 and having a sun class
related to encoding simply being removed, although I had been warned.
Are there any metric tests that give indication on performance gain?
> Further optimize byte comparison methods
> ----------------------------------------
>
> Key: HBASE-4012
> URL: https://issues.apache.org/jira/browse/HBASE-4012
> Project: HBase
> Issue Type: Improvement
> Components: util
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Ted Yu
> Priority: Minor
> Labels: noob
> Fix For: 0.92.0
>
> Attachments: 4012-v2.txt, 4012.txt
>
>
> Guava uses some clever tricks with sun.misc.Unsafe to compare byte arrays
> about 100% faster than the naive byte-by-byte implementation:
> http://guava-libraries.googlecode.com/svn/trunk/guava/src/com/google/common/primitives/UnsignedBytes.java
> We should borrow this [Apache 2 licensed] code.
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