ArvinZheng opened a new issue #9849:
URL: https://github.com/apache/druid/issues/9849
```
public Comparator getComparator(List<AggregatorFactory> aggregatorSpecs,
List<PostAggregator> postAggregatorSpecs)
{
Comparator comp = null;
for (AggregatorFactory factory : aggregatorSpecs) {
if (metric.equals(factory.getName())) {
comp = factory.getComparator();
break;
}
}
for (PostAggregator pf : postAggregatorSpecs) {
if (metric.equals(pf.getName())) {
comp = pf.getComparator();
break;
}
}
return comp;
}
```
as per the above code, if there is a `PostAggregator` which name equals to
the metric name, we always use the `Comparator from this PostAggregator`,
change the order of these 2 for loop and return at the break, we can avoid
unnecessary iteration on `aggregatorSpecs`.
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