huaxiang sun created HBASE-17245:
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Summary: Optimize HTableDescriptor#htd.getColumnFamilies().length
Key: HBASE-17245
URL: https://issues.apache.org/jira/browse/HBASE-17245
Project: HBase
Issue Type: Improvement
Affects Versions: 2.0.0
Reporter: huaxiang sun
Assignee: huaxiang sun
Priority: Minor
Found quite a few places doing something like
{code}
if (htd.getColumnFamilies().length == 0) {
{code}
HTableDescriptor#htd.getColumnFamilies() does a few memory allocations. The
purpose is to get the family number, it can be replaced with
{code}
+ public int getColumnFamilyCount() {
+ return families.size();
+ }
{code}
in HTableDescriptor which does not need these memory allocations.
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