tju-yxq opened a new pull request, #1600:
URL: https://github.com/apache/rocketmq-dashboard/pull/1600

   ## What is the purpose of the change
   
   Fixes #1599
   
   `TencentInstanceProvider.countTopics()` fetched all topics via API (up to 
10,000) just to return `.size()`. This caused extreme latency on the instance 
list page.
   
   ## Brief changelog
   
   - **`TencentInstanceProvider.java`**: Changed `countTopics` to fetch only 1 
item (limit=1) and use the `TotalCount` field from the API response. Falls back 
to full scan only if `TotalCount` is null.
   
   ## Verifying this change
   
   1. Configure a Tencent instance with 500+ topics.
   2. Open instance list page.
   3. Before fix: takes 5+ seconds (5+ API calls).
   4. After fix: instant (1 API call returning count).
   
   - [x] Make sure there is a Github issue filed for the change.
   - [x] Format the pull request title like `[ISSUE #1599] ...`.
   - [x] Write a pull request description that is detailed enough.
   - [x] Write necessary unit-test.
   - [x] Run `mvn -B clean apache-rat:check findbugs:findbugs 
checkstyle:checkstyle`.
   - [ ] If this contribution is large, please file an Apache Individual 
Contributor License Agreement.


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