chunhui shen created HBASE-8452:
-----------------------------------
Summary: Reduce byte copy in PrefixTreeSeeker
Key: HBASE-8452
URL: https://issues.apache.org/jira/browse/HBASE-8452
Project: HBase
Issue Type: Improvement
Components: regionserver
Affects Versions: 0.95.0
Reporter: chunhui shen
Assignee: chunhui shen
In PrefixTreeSeeker, I think we could do two improvement for deep copy of byte.
1.
{code}
PrefixTreeSeeker#getKeyValue(){
KeyValueUtil.copyToNewKeyValue(ptSearcher.current());
}
{code}
This method will be called frequently when reading. e.g. Scanner#peek(),
Scanner comparison in KeyValueHeap
2.
{code}
PrefixTreeSeeker#seekToOrBeforeUsingPositionAtOrBefore(){
KeyValue.createKeyValueFromKey(keyOnlyBytes, offset, length);
}
PrefixTreeSeeker#seekToOrBeforeUsingPositionAtOrAfter(){
KeyValue.createKeyValueFromKey(keyOnlyBytes, offset, length);
}
{code}
Solution:
1.Using a cache for seeker's current keyvalue.
2.Importing new KeyOnlyCell class without coping bytes.
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