Shaofeng SHI created KYLIN-4063:
-----------------------------------
Summary: Avoid repeatedly calling "string.toLowerCase" in
TimedJsonStreamParser#parse
Key: KYLIN-4063
URL: https://issues.apache.org/jira/browse/KYLIN-4063
Project: Kylin
Issue Type: Improvement
Components: NRT Streaming
Reporter: Shaofeng SHI
In TimedJsonStreamParser#parse, it has this:
{code:java}
for (TblColRef column : allColumns) {
final String columnName = column.getName().toLowerCase(Locale.ROOT);
if (populateDerivedTimeColumns(columnName, result, t) == false) {
result.add(getValueByKey(column, root));
}
}
{code}
As this method will be invoked for each message, and then for each column it
will have a "toLowerCase(Locale.ROOT)", which is unnecessary, because the
"allColumns" won't change.
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