[rocketmq] branch develop updated: [ISSUE 3585] [Part H] Avoid unnecessary StringBuilder resizing on critical path (#3612)

[huangli]

This is an automated email from the ASF dual-hosted git repository.

huangli pushed a commit to branch develop
in repository https://gitbox.apache.org/repos/asf/rocketmq.git


The following commit(s) were added to refs/heads/develop by this push:
     new 38b20fb  [ISSUE 3585] [Part H] Avoid unnecessary StringBuilder 
resizing on critical path (#3612)
38b20fb is described below

commit 38b20fb6a1a984ddee9b69161e1a2710c404fc08
Author: coding <zanglei.z...@qq.com>
AuthorDate: Fri Dec 10 10:06:40 2021 +0800

    [ISSUE 3585] [Part H] Avoid unnecessary StringBuilder resizing on critical 
path (#3612)
    
    Co-authored-by: zanglei <zang...@kuaishou.com>
---
 .../org/apache/rocketmq/broker/longpolling/PullRequestHoldService.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git 
a/broker/src/main/java/org/apache/rocketmq/broker/longpolling/PullRequestHoldService.java
 
b/broker/src/main/java/org/apache/rocketmq/broker/longpolling/PullRequestHoldService.java
index 417ec0d..866f357 100644
--- 
a/broker/src/main/java/org/apache/rocketmq/broker/longpolling/PullRequestHoldService.java
+++ 
b/broker/src/main/java/org/apache/rocketmq/broker/longpolling/PullRequestHoldService.java
@@ -56,7 +56,7 @@ public class PullRequestHoldService extends ServiceThread {
     }
 
     private String buildKey(final String topic, final int queueId) {
-        StringBuilder sb = new StringBuilder();
+        StringBuilder sb = new StringBuilder(topic.length() + 5);
         sb.append(topic);
         sb.append(TOPIC_QUEUEID_SEPARATOR);
         sb.append(queueId);