[dubbo] branch 3.0 updated: perf: Improve the performance for generating random numbers (#8167)

[albumenj]

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

albumenj pushed a commit to branch 3.0
in repository https://gitbox.apache.org/repos/asf/dubbo.git


The following commit(s) were added to refs/heads/3.0 by this push:
     new 9279c78  perf: Improve the performance for generating random numbers 
(#8167)
9279c78 is described below

commit 9279c786b16bddc28111532b5d7ebeed67a9874b
Author: Xiong, Pin <pinxion...@foxmail.com>
AuthorDate: Tue Jun 29 22:15:19 2021 -0500

    perf: Improve the performance for generating random numbers (#8167)
---
 .../apache/dubbo/rpc/cluster/router/mesh/route/MeshRuleRouter.java  | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git 
a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/mesh/route/MeshRuleRouter.java
 
b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/mesh/route/MeshRuleRouter.java
index 9a87c7a..2395d9d 100644
--- 
a/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/mesh/route/MeshRuleRouter.java
+++ 
b/dubbo-cluster/src/main/java/org/apache/dubbo/rpc/cluster/router/mesh/route/MeshRuleRouter.java
@@ -42,7 +42,7 @@ import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
-import java.util.Random;
+import java.util.concurrent.ThreadLocalRandom;
 
 
 public class MeshRuleRouter implements Router, VsDestinationGroupRuleListener {
@@ -79,9 +79,7 @@ public class MeshRuleRouter implements Router, 
VsDestinationGroupRuleListener {
         if (routeDestination == null) {
             return invokers;
         } else {
-            Random random = new Random();
-            int index = random.nextInt(routeDestination.size());
-            DubboRouteDestination dubboRouteDestination = 
routeDestination.get(index);
+            DubboRouteDestination dubboRouteDestination = 
routeDestination.get(ThreadLocalRandom.current().nextInt(routeDestination.size()));
 
             DubboDestination dubboDestination = 
dubboRouteDestination.getDestination();