Anoop Sam John created HBASE-14202:
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Summary: Reduce garbage we create
Key: HBASE-14202
URL: https://issues.apache.org/jira/browse/HBASE-14202
Project: HBase
Issue Type: Sub-task
Affects Versions: 2.0.0
Reporter: Anoop Sam John
Assignee: Anoop Sam John
Fix For: 2.0.0
2 optimizations wrt no# short living objects we create
1. IOEngine#read call to read from L2 cache is always creating a Pair object to
return the BB and MemoryType. We can avoid this by making the read API to
return a Cacheable. Pass the CacheableDeserializer, to be used, also to the
read API. Setter for MemoryType is already there in Cacheable interface.
2. ByteBuff#asSubByteBuffer(int, int, Pair) avoids Pair object creation every
time as we pass the shared Pair object. Still as pair can take only Objects,
the primitive int has to be boxed into an Integer object every time. This can
be avoided by creating a new Pair type which is a pair of an Object and a
primitive int.
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