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Avoid Needless Set Instantiation in InboundMessage (#44318) (#44329) 

* Avoid Needless Set Instantiation in InboundMessage

* When `features` is empty (when there's no xpack) we constantly and needless instantiated a few objects here for the empty set on every message
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Armin Braun 2019-07-15 10:59:51 +02:00 committed by GitHub
parent 0cc94a457d
commit 7f5d40d235
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1 changed files with 6 additions and 1 deletions
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7
server/src/main/java/org/elasticsearch/transport/InboundMessage.java
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@ -101,7 +101,12 @@ public abstract class InboundMessage extends NetworkMessage implements Closeable
if (TransportStatus.isRequest(status)) {
final Set<String> features;
if (remoteVersion.onOrAfter(Version.V_6_3_0)) {
features = Collections.unmodifiableSet(new TreeSet<>(Arrays.asList(streamInput.readStringArray())));
final String[] featuresFound = streamInput.readStringArray();
if (featuresFound.length == 0) {
features = Collections.emptySet();
} else {
features = Collections.unmodifiableSet(new TreeSet<>(Arrays.asList(featuresFound)));
}
} else {
features = Collections.emptySet();
}