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The following commit(s) were added to refs/heads/master by this push:
new 267a6cc low hanging fruit - presize hash map for DruidSegmentReader
(#9836)
267a6cc is described below
commit 267a6cc175736dccb16e8e43abd2772c0f44f611
Author: Clint Wylie <[email protected]>
AuthorDate: Thu May 7 12:39:14 2020 -0700
low hanging fruit - presize hash map for DruidSegmentReader (#9836)
---
.../java/org/apache/druid/indexing/input/DruidSegmentReader.java | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git
a/indexing-service/src/main/java/org/apache/druid/indexing/input/DruidSegmentReader.java
b/indexing-service/src/main/java/org/apache/druid/indexing/input/DruidSegmentReader.java
index f2ce056..6460ae4 100644
---
a/indexing-service/src/main/java/org/apache/druid/indexing/input/DruidSegmentReader.java
+++
b/indexing-service/src/main/java/org/apache/druid/indexing/input/DruidSegmentReader.java
@@ -21,7 +21,6 @@ package org.apache.druid.indexing.input;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Preconditions;
-import com.google.common.collect.Maps;
import org.apache.druid.data.input.InputEntity;
import org.apache.druid.data.input.InputEntity.CleanableFile;
import org.apache.druid.data.input.InputRow;
@@ -49,6 +48,7 @@ import org.apache.druid.segment.column.ColumnHolder;
import org.apache.druid.segment.data.IndexedInts;
import org.apache.druid.segment.filter.Filters;
import org.apache.druid.segment.realtime.firehose.WindowedStorageAdapter;
+import org.apache.druid.utils.CollectionUtils;
import org.joda.time.DateTime;
import java.io.File;
@@ -245,7 +245,8 @@ public class DruidSegmentReader extends
IntermediateRowParsingReader<Map<String,
if (!hasNext()) {
throw new NoSuchElementException();
}
- final Map<String, Object> theEvent = Maps.newLinkedHashMap();
+ final Map<String, Object> theEvent =
+ CollectionUtils.newLinkedHashMapWithExpectedSize(dimSelectors.size()
+ metSelectors.size() + 1);
for (Entry<String, DimensionSelector> dimSelector :
dimSelectors.entrySet()) {
final String dim = dimSelector.getKey();
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