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https://issues.apache.org/jira/browse/CAMEL-20809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18047659#comment-18047659
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Claus Ibsen commented on CAMEL-20809:
-------------------------------------
These components will lazy populate headers
camel-irc/src/main/java/org/apache/camel/component/irc/IrcMessage.java:
protected void populateInitialHeaders(Map<String, Object> map) {
camel-jms/src/main/java/org/apache/camel/component/jms/JmsMessage.java:
protected void populateInitialHeaders(Map<String, Object> map) {
camel-mail/src/main/java/org/apache/camel/component/mail/MailMessage.java:
protected void populateInitialHeaders(Map<String, Object> map) {
camel-quartz/src/main/java/org/apache/camel/component/quartz/QuartzMessage.java:
protected void populateInitialHeaders(Map<String, Object> map) {
camel-sjms/src/main/java/org/apache/camel/component/sjms/SjmsMessage.java:
protected void populateInitialHeaders(Map<String, Object> map) {
camel-xmpp/src/main/java/org/apache/camel/component/xmpp/XmppMessage.java:
protected void populateInitialHeaders(Map<String, Object> map) {
> camel-core: potential to reduce allocations
> -------------------------------------------
>
> Key: CAMEL-20809
> URL: https://issues.apache.org/jira/browse/CAMEL-20809
> Project: Camel
> Issue Type: Task
> Components: camel-core
> Affects Versions: 4.7.0
> Reporter: Otavio Rodolfo Piske
> Assignee: Otavio Rodolfo Piske
> Priority: Minor
> Fix For: 4.x
>
>
> There's a chance we could reduce or delay unnecessary allocations by not
> creating message headers [when the intention is just to check if headers are
> present|https://github.com/apache/camel/blob/main/core/camel-support/src/main/java/org/apache/camel/support/DefaultMessage.java#L288-L291].
>
>
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