🐛 [BUG]官网示例有性能问题

### 🐛 Bug description [Please make everyone to understand it]

> Please provide a link by forking these links [G2Plot](https://codesandbox.io/s/g2plot-issue-template-gzfdq?file=/index.ts) or GitHub repo, a minimal reproduction.

**https://g2plot.antv.antgroup.com/examples/case/statistical-scenario/#trend**:

### 📷 Step to reproduce
网页放置一段时间后CPU占用会一直上升，最多到250%(macbook M1 pro)

### 🏞 Expected result
CPU占用正常

### 🚑 Any additional [like screenshots]

* **G2Plot Version**:
* **Platform**: mac

Start with the linked G2Plot statistical-scenario trend example and reproduce the reported CPU increase after leaving the page open on macOS. Trace the example's behavior over time; done means CPU usage no longer continually rises during the same idle-period test.

Written by the indexing model from the issue text.